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Dr. Remigio Paradelo
Departamento de Edafoloxía e Química Agrícola, Universidade de Santiago de Compostela, Spain

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0 Compost
0 Soil
0 Waste Management
0 trace elements
0 soil contamination

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trace elements
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soil remediation

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Journal article
Published: 12 June 2021 in Journal of Environmental Management
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Research on biosorption of organic dyes is an important subject for the development of clean technologies for the treatment of textile wastewater. In this work, the process of sorption of four textile dyes of different natures, namely Basic Violet 10 (BV10), Acid Red 27 (AR27), Direct Blue 151 (DB151) and Reactive Violet 4 (RV4) onto two composts, pine bark compost and municipal solid waste compost, has been studied. For this, sorption kinetics and equilibrium sorption at different solution pH values (3.0–7.0) and salinity (0–1.0 M KCl) conditions have been assessed in batch experiments. Sorption rates were relatively slow for BV10, reaching equilibrium only after 24 h, and faster for the rest: around 5–6 h for RV4 and AR27 and 2 h for DB151. Kinetics of dye sorption followed a pseudo-first order model, except that of DB151, which was better described by a pseudo-second order model. The sequence of adsorption capacity for both composts was as follows: BV10 > DB151 > RV4 > AR27. In general, dye sorption at the equilibrium was adequately described by the Langmuir model, what allows to estimate maximum retention capacities for each dye by the composts. At the best removal conditions, pine bark compost presented maximum sorption capacities of 204 mg g−1 for BV10, 54 mg g−1 for DB151, 23 mg g−1 for RV4, and 4.1 mg g−1 for AR27, whereas municipal solid waste compost showed maximum sorption of 74 mg g−1 for DB151, 38 mg g−1 for RV4, 36 mg g−1 for BV10, and 1.6 mg g−1 for AR27. Sorption increased at acid pH in all cases, likely because of modification of charges of the dyes and higher electrostatic attraction, whereas increasing salinity also had a positive effect on sorption, attributed to a solute-aggregation mechanism in solution. In conclusion, organic waste-derived products, like composts, can be applied in the removal of colorants from wastewater, although they would be more effective for the removal of basic cationic dyes than other types, due to electrostatic interaction with mostly negatively-charged composts.

ACS Style

Khaled Al-Zawahreh; María Teresa Barral; Yahya Al-Degs; Remigio Paradelo. Comparison of the sorption capacity of basic, acid, direct and reactive dyes by compost in batch conditions. Journal of Environmental Management 2021, 294, 113005 .

AMA Style

Khaled Al-Zawahreh, María Teresa Barral, Yahya Al-Degs, Remigio Paradelo. Comparison of the sorption capacity of basic, acid, direct and reactive dyes by compost in batch conditions. Journal of Environmental Management. 2021; 294 ():113005.

Chicago/Turabian Style

Khaled Al-Zawahreh; María Teresa Barral; Yahya Al-Degs; Remigio Paradelo. 2021. "Comparison of the sorption capacity of basic, acid, direct and reactive dyes by compost in batch conditions." Journal of Environmental Management 294, no. : 113005.

Journal article
Published: 06 May 2021 in Applied Sciences
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With the objective of increasing information inorganic pollutants in urban soils in Spain, we studied the presence of Cu, Pb, Zn, Ni, Cr, and As in 55 soils in the city of Santiago de Compostela (northwestern Spain). The soils were developed over diverse parent materials (granites, gneiss, schists, and amphibolites) and present different land uses, urban grasslands, urban forests, urban allotment gardens, and peri-urban agricultural soils. Total trace element concentrations, analyzed by XRF of ground samples, were correlated to physicochemical properties of the soils, and the influence of land use, lithology, and location on the degree of pollution was explored. In most soils, trace element concentrations followed the sequence Zn (55–484 mg kg−1) > Pb (20–566 mg kg−1) > Cr (17–277 mg kg−1) > Cu (17–188 mg kg−1) > As (13–205 mg kg−1) > Ni (11–91 mg kg−1). The concentrations were overall higher than regional backgrounds, but not high enough to class the soils as contaminated according to the Spanish regulation. Accordingly, the geoaccumulation index values indicate that most soils present low to moderate pollution levels. Among the elements studied, Cu, Pb, and Zn were correlated between them, with their highest concentrations happening in soils of the green areas in the city center; Cr and Ni concentrations were related to lithology of the parent material, with the highest concentrations in soils developed over amphibolite; finally, As concentrations are higher in two precise points without a clear connection to a known source of pollution.

ACS Style

Cecilia Herbón; María Barral; Remigio Paradelo. Potentially Toxic Trace Elements in the Urban Soils of Santiago de Compostela (Northwestern Spain). Applied Sciences 2021, 11, 4211 .

AMA Style

Cecilia Herbón, María Barral, Remigio Paradelo. Potentially Toxic Trace Elements in the Urban Soils of Santiago de Compostela (Northwestern Spain). Applied Sciences. 2021; 11 (9):4211.

Chicago/Turabian Style

Cecilia Herbón; María Barral; Remigio Paradelo. 2021. "Potentially Toxic Trace Elements in the Urban Soils of Santiago de Compostela (Northwestern Spain)." Applied Sciences 11, no. 9: 4211.

Review article
Published: 16 April 2021 in Geoderma Regional
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Being critical to achieving Sustainable Development Goals (SDGs) of the United Nations, strengthening understanding of the properties and processes of soil at national and regional scales is imperative. The necessity to realize SDGs by 2030 also inspires a greater sense of responsibility and care for soils. Sustainable management of soil health is important to achieving several SDGs. Pertinent SDGs intricately connected with soil health include SDG 1 (End Poverty), 2 (Zero Hunger), 3 (Good Health and Wellbeing), 5 (Gender Equality), 6 (Clean Water and Sanitation), 7 (Affordable and Clean Energy), 9 (Industry Innovation and Infrastructure), 11 (Sustainable Cities and Communities), 12 (Responsible Consumption and Production), 13 (Climate Action), and 15 (Life on Land). Some of these SDGs rely considerably on plant production and others depend on soil processes. Pertinent among soil processes are water movement, heat transfer, sorption and physical filtration, ion exchange, and biochemical and biophysical transformations. In terms of specific accomplishments, 130 countries have aligned with the Zero Hunger Challenge, the globally available fresh water has decreased to 71% of needs, Technosols (soils whose formation is influenced by anthropogenic based materials) are used in urban ecosystems, food wastes are composted, specific targets of Land Degradation Neutrality have been signed by several countries, and soil C sequestration targets are widely implemented through initiatives such as the 4 Per Thousand (4P1000) initiative, Platform on Climate Action in Americas (PLACA), Adapting African Agriculture (AAA), Living Soils of the Americas (LiSAM), etc. In addition, policy and regulatory frameworks being widely promoted by several U.N. agencies (e.g., U.N. SDGs,limiting global warming to 1.5°C or 2 °C) can be supported by innovations in soil science including forensic soil science, remote sensing and other innovations. Soil health is becoming a central element of the research and innovation program of the EU, aiming to reach a 75% of healthy soils by 2030. In addition, the importance of soil health to human health and environmental issues is being widely promoted through educational books on soil science and secondary schools, as well as the revision of curricula. With continuous progress in movement into the digital world, transfer and communication of knowledge of the soil sciences can improve for the end users, policymakers, and the general public but additional efforts are needed. Soil science knowledge and research forms a significant contribution to specific aspects of food and nutritional security, human wellbeing, nature conservancy, and global peace and harmony. Achieving critical SDGs by 2030 can be facilitated by soil restoration and sustainable management.

ACS Style

Rattan Lal; Johan Bouma; Eric Brevik; Lorna Dawson; Damien J. Field; Bruno Glaser; Ryusuke Hatano; Alfred E. Hartemink; Takashi Kosaki; Bruce Lascelles; Curtis Monger; Cristine Muggler; Georges Martial Ndzana; Stefan Norra; Xicai Pan; Remigio Paradelo; Laura Bertha Reyes-Sánchez; Taru Sandén; Bal Ram Singh; Heide Spiegel; Junta Yanai; Jiabao Zhang. Soils and sustainable development goals of the United Nations: An International Union of Soil Sciences perspective. Geoderma Regional 2021, 25, e00398 .

AMA Style

Rattan Lal, Johan Bouma, Eric Brevik, Lorna Dawson, Damien J. Field, Bruno Glaser, Ryusuke Hatano, Alfred E. Hartemink, Takashi Kosaki, Bruce Lascelles, Curtis Monger, Cristine Muggler, Georges Martial Ndzana, Stefan Norra, Xicai Pan, Remigio Paradelo, Laura Bertha Reyes-Sánchez, Taru Sandén, Bal Ram Singh, Heide Spiegel, Junta Yanai, Jiabao Zhang. Soils and sustainable development goals of the United Nations: An International Union of Soil Sciences perspective. Geoderma Regional. 2021; 25 ():e00398.

Chicago/Turabian Style

Rattan Lal; Johan Bouma; Eric Brevik; Lorna Dawson; Damien J. Field; Bruno Glaser; Ryusuke Hatano; Alfred E. Hartemink; Takashi Kosaki; Bruce Lascelles; Curtis Monger; Cristine Muggler; Georges Martial Ndzana; Stefan Norra; Xicai Pan; Remigio Paradelo; Laura Bertha Reyes-Sánchez; Taru Sandén; Bal Ram Singh; Heide Spiegel; Junta Yanai; Jiabao Zhang. 2021. "Soils and sustainable development goals of the United Nations: An International Union of Soil Sciences perspective." Geoderma Regional 25, no. : e00398.

Special section
Published: 15 May 2020 in Journal of Environmental Quality
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Urban soils are still insufficiently known in many cities, despite the relevance of their functions in the urban environment. The city of Santiago de Compostela (NW Spain) offers interesting opportunities for the study of urban soils, because of its geological diversity and the variety of land use and vegetation. With the objective of increasing information about urban soils in Spain, in this work we have studied samples from 56 urban soils (0‐20 cm) in this city, developed over different parent materials (granites, gneiss, schists and amphibolites) and under several land uses (lawn areas, forested areas, urban allotment gardens, periurban agricultural soils, and a green roof). The main physico‐chemical properties of the soils were analyzed, including bulk density, texture, pH, organic matter, cation exchange capacity, available P and compounds of Fe and Al. The soils are coarse‐textured (dominant texture is sandy loam), acid (pH in water from 4.7 to 6.9), with moderate to high in organic matter contents (13‐137 g OC kg−1). Cation exchange capacity ranges from 9 to 36 cmolc kg−1, with Ca as the most abundant exchangeable cation in most soils and Al in the rest. Overall, the soils do not show several of the common features of other urban soils, such as alkalinity, high bulk density or large amounts of artifacts, and their composition is very similar to their natural counterparts in the region. The conservation of these soils with low degree of artificialization is essential because they are able to provide a wide range of ecosystem services. The city of Santiago de Compostela has acid, organic matter‐rich, sandy‐loam soils. Soils do not present the most typical features of very anthropized urban soils. They are more similar to nearby natural/agricultural soils than to other urban soils. This article is protected by copyright. All rights reserved

ACS Style

Remigio Paradelo; Cecilia Herbón; María Teresa Barral. Composition and chemical properties of the soils of the city of Santiago de Compostela, northwestern Spain. Journal of Environmental Quality 2020, 50, 7 -21.

AMA Style

Remigio Paradelo, Cecilia Herbón, María Teresa Barral. Composition and chemical properties of the soils of the city of Santiago de Compostela, northwestern Spain. Journal of Environmental Quality. 2020; 50 (1):7-21.

Chicago/Turabian Style

Remigio Paradelo; Cecilia Herbón; María Teresa Barral. 2020. "Composition and chemical properties of the soils of the city of Santiago de Compostela, northwestern Spain." Journal of Environmental Quality 50, no. 1: 7-21.

Journal article
Published: 09 May 2020 in Materials
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Utilization of composts as low-cost adsorbents is an important application in the field of environmental remediation, but these materials have not yet been extensively used for dye removal. In this work, we have studied the characteristics of adsorption of methylene blue onto two composts (a municipal solid waste compost and a pine bark compost). Kinetics and equilibrium batch experiments testing the influence of adsorbent particle size, solution pH and ionic strength were performed. Both composts have a high adsorption capacity for methylene blue, similar to other low-cost adsorbents. Kinetics of adsorption followed a pseudo-first-order model, with maximum adsorption reached after a contact time of two hours. Equilibrium adsorption followed a Langmuir model in general. Reduction of particle size only increased adsorption slightly for composted pine bark. Increase in ionic strength had no effect on adsorption by municipal solid waste compost, but increased adsorption by composted pine bark. Modification of pH between 5 and 7 did not influence adsorption in any case. Overall, the results suggest that electrostatic interaction between the cationic dye and the anionic functional groups in the composts is not the only mechanism involved in adsorption. In conclusion, the use of composts for dye removal is a likely application, in particular for those composts presenting limitations for agricultural use.

ACS Style

Remigio Paradelo; Khaled Al-Zawahreh; María Teresa Barral. Utilization of Composts for Adsorption of Methylene Blue from Aqueous Solutions: Kinetics and Equilibrium Studies. Materials 2020, 13, 2179 .

AMA Style

Remigio Paradelo, Khaled Al-Zawahreh, María Teresa Barral. Utilization of Composts for Adsorption of Methylene Blue from Aqueous Solutions: Kinetics and Equilibrium Studies. Materials. 2020; 13 (9):2179.

Chicago/Turabian Style

Remigio Paradelo; Khaled Al-Zawahreh; María Teresa Barral. 2020. "Utilization of Composts for Adsorption of Methylene Blue from Aqueous Solutions: Kinetics and Equilibrium Studies." Materials 13, no. 9: 2179.

Journal article
Published: 22 April 2020 in International Journal of Environmental Research and Public Health
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Interest in using urban waste composts as amendments in urban agriculture is growing nowadays. However, concerns about the potential transference of pollutants present in urban waste to the food chain are very relevant when they are recycled for food or animal feed production. Thus, for the safe use of urban waste composts, it has to be assured that no risk of metal transference to plants from compost exists. In this work, the transference of heavy metals from urban waste composts to plants has been studied in an experiment with lettuce and Italian ryegrass, grown in substrates based on five metal-rich composts and a manure vermicompost (included for comparison). A two-month pot experiment was performed under controlled light and temperature conditions, and plant growth and uptake of Cu, Pb, Cd and Zn were analyzed. For both species, the concentration of metals in plant tissue followed the sequence Zn > Cu >> Pb ≈ Cd, the same as the metal concentrations in four out of the five composts. Plant concentrations of Zn, Cu and Cd increased with their concentrations in compost, whereas this relation was not observed for Pb. The ratio between element concentration in plant and compost were much higher for Zn, Cd and Cu than for Pb, showing the lower bioavailability of Pb with respect to other metals.

ACS Style

Remigio Paradelo; Antía Villada; María Teresa Barral. Heavy Metal Uptake of Lettuce and Ryegrass from Urban Waste Composts. International Journal of Environmental Research and Public Health 2020, 17, 2887 .

AMA Style

Remigio Paradelo, Antía Villada, María Teresa Barral. Heavy Metal Uptake of Lettuce and Ryegrass from Urban Waste Composts. International Journal of Environmental Research and Public Health. 2020; 17 (8):2887.

Chicago/Turabian Style

Remigio Paradelo; Antía Villada; María Teresa Barral. 2020. "Heavy Metal Uptake of Lettuce and Ryegrass from Urban Waste Composts." International Journal of Environmental Research and Public Health 17, no. 8: 2887.

Review article
Published: 24 May 2019 in Environmental Science and Pollution Research
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The use of composts and vermicomposts as adsorbents is an important topic of study in the field of environmental remediation. These materials are rich in organic matter and have functional groups that can interact with organic and inorganic compounds. They also contain microorganisms that can promote biodegradation of organic substances. Composts that cannot be used for agronomic purposes (owing to e.g. low nutrient levels or phytotoxicity) may be valuable for soil remediation or pollutant removal. In this review, we discuss papers on this topic, with the objective of drawing attention to the potential use of composts/vermicomposts and to recommend further investigation on this subject. Few published studies have investigated the use of composts/vermicomposts to remove dyes and other coloured compounds. However, preliminary results show that these materials are potentially good adsorbents, at least comparable to other low-cost adsorbents, and that, in general, basic dyes are more efficiently removed than direct, reactive or acid dyes. The results of the works reviewed also show that dye removal takes place by adsorption mechanisms, in most studies following a Langmuir model, and that the kinetics of removal are fast and follow a pseudo-second order model. However, there remain several uncertainties regarding this application. For example, very few dyes have been studied so far, and little is known about the influence of the properties of composts/vermicomposts on the dye removal process. Moreover, the possible use of compost/vermicompost to enhance biodegradation processes has not been explored. All these questions should be addressed in future research.

ACS Style

Remigio Paradelo; Xanel Vecino; Ana Belén Moldes; María Teresa Barral. Potential use of composts and vermicomposts as low-cost adsorbents for dye removal: an overlooked application. Environmental Science and Pollution Research 2019, 26, 21085 -21097.

AMA Style

Remigio Paradelo, Xanel Vecino, Ana Belén Moldes, María Teresa Barral. Potential use of composts and vermicomposts as low-cost adsorbents for dye removal: an overlooked application. Environmental Science and Pollution Research. 2019; 26 (21):21085-21097.

Chicago/Turabian Style

Remigio Paradelo; Xanel Vecino; Ana Belén Moldes; María Teresa Barral. 2019. "Potential use of composts and vermicomposts as low-cost adsorbents for dye removal: an overlooked application." Environmental Science and Pollution Research 26, no. 21: 21085-21097.

Journal article
Published: 17 April 2019 in Soil and Tillage Research
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Recycling composted organic residues in agriculture can reduce the need for mineral fertilizers and improve the physicochemical and biological properties of cultivated soils. However, more studies dealing with soil physical properties after compost amendment are still needed. The objective of this study was to investigate the impact of long-term compost amendment on soil physical properties in a silt loam Luvisol under a maize-wheat rotation in the Paris Basin. Since 1998, three composts and one manure were applied every second year after wheat harvest, at a rate of ca. 4 Mg C ha−1. Bulk density, organic carbon concentration on a mass basis, water holding capacity, gas transport properties and Atterberg limits were measured on topsoil samples taken 15 years after the beginning of the experiment. Soil moisture was monitored in the field down to a depth of 160 cm during two years with different climatic conditions: a year with a dry summer (2010) and a year with a wet summer (2012). Compost and manure amendments reduced bulk density and increased organic carbon concentrations, which improved apparent air permeability and gas diffusivity, but only one of the amendments (a green waste-sewage sludge compost) increased water-holding capacity. The amendments also increased the water contents at the Atterberg limits and overall produced better soil conditions for tillage and other agricultural operations, in particular in wet years. However, field moisture measurements showed that in general, soil water contents were not higher in the amended soils than in the control at any of the periods considered.

ACS Style

Remigio Paradelo; Marie Eden; Ingrid Martínez; Thomas Keller; Sabine Houot. Soil physical properties of a Luvisol developed on loess after 15 years of amendment with compost. Soil and Tillage Research 2019, 191, 207 -215.

AMA Style

Remigio Paradelo, Marie Eden, Ingrid Martínez, Thomas Keller, Sabine Houot. Soil physical properties of a Luvisol developed on loess after 15 years of amendment with compost. Soil and Tillage Research. 2019; 191 ():207-215.

Chicago/Turabian Style

Remigio Paradelo; Marie Eden; Ingrid Martínez; Thomas Keller; Sabine Houot. 2019. "Soil physical properties of a Luvisol developed on loess after 15 years of amendment with compost." Soil and Tillage Research 191, no. : 207-215.

Original research
Published: 12 February 2019 in International Journal of Recycling of Organic Waste in Agriculture
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A field trial was conducted on a silty-loam soil under potato culture in NW Spain, to assess the effect of municipal solid waste (MSW) compost in a heavily fertilized acid soil. Three doses of compost (0, 30 and 60 Mg compost ha−1 soil) or inorganic fertilization (~ 140 N: 120 P2O5: 240 K2O kg ha−1 soil) were assayed. The effects of compost on soil physical, chemical (nutrient status and potentially toxic trace elements) and biochemical properties were evaluated after 1 and 5 months. Compost addition at the highest dose decreased bulk density and increased soil porosity and soil stability against water erosion. Soil pH, total organic C and N, cation exchange capacity and available P, Ca, Mg and K were also higher in compost-amended soils, whereas no effect on NH4+-N and NO3−-N was observed. Compost significantly increased soil microbial biomass and dehydrogenase activity. Due to the high nutrient status in the control soil, potato yield was not increased by compost or inorganic fertilization. A negative consequence of compost addition was the increased extractability of trace metals such as Zn, Cu, Pb and Ni, although their total concentrations in soil or in potato tubers did not increase with respect to the control. Overall, results show that positive effects of MSW compost can be expected even in rich soils that do not need fertilization for maintaining their productive function in the short-term. These positive effects prove the benefits of recycling urban wastes in agricultural soils as a sustainable way of waste management.

ACS Style

Marta Domínguez; Remigio Paradelo Núñez; Juan Piñeiro; María Teresa Barral. Physicochemical and biochemical properties of an acid soil under potato culture amended with municipal solid waste compost. International Journal of Recycling of Organic Waste in Agriculture 2019, 8, 171 -178.

AMA Style

Marta Domínguez, Remigio Paradelo Núñez, Juan Piñeiro, María Teresa Barral. Physicochemical and biochemical properties of an acid soil under potato culture amended with municipal solid waste compost. International Journal of Recycling of Organic Waste in Agriculture. 2019; 8 (2):171-178.

Chicago/Turabian Style

Marta Domínguez; Remigio Paradelo Núñez; Juan Piñeiro; María Teresa Barral. 2019. "Physicochemical and biochemical properties of an acid soil under potato culture amended with municipal solid waste compost." International Journal of Recycling of Organic Waste in Agriculture 8, no. 2: 171-178.

Journal article
Published: 09 October 2018 in Science of The Total Environment
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Recycling organic residues in agrosystems presents several benefits but faces the question of contaminants, among them a few trace metals which eventually accumulate in soils following regular applications of organic waste products (OWP) and represent an ecological risk. The increase of total trace metal contents in amended topsoils can be predicted by a mass balance approach, but the evolution of their available fractions is a more intricate issue. We aimed at modelling this evolution by using the dataset of a long-term field experiment of OWP applications (manure and three urban waste composts). Two operationally-defined fractions of 6 trace metals have been quantified in the OWP and amended topsoils between 2002 and 2015: the soluble and potentially available metals, extracted in 0.01 M CaCl2 and 0.05 M EDTA solutions, respectively. The potentially available metals have progressively increased in amended topsoils, at rates depending on elements and types of OWP. For Zn, these increases corresponded in average to inputs of potentially available Zn from OWP. But the soil stocks of potentially available Cu increased faster than from the inputs of EDTA-extractable Cu, showing linear regression slopes between 1.4 and 2.5, depending on OWP type. The influence of OWP has been provisionally interpreted in the light of their efficiency to increase soil organic matter and their inputs of reactive oxides. Soluble copper has increased with repeated amendments. But soluble cadmium, nickel and zinc have generally decreased, as they are influenced by changing soil variables such as pH and organic matter. Statistic models were used to unravel the relationships between soluble and EDTA-extractable metals and other soil variables. For Cu, the most satisfactory models just relate soluble and potentially available Cu. Developing such models could contribute to predict the long-term effects of a precise scenario of agricultural OWP recycling upon available trace metals in soils.

ACS Style

Philippe Cambier; Aurélia Michaud; Remigio Paradelo; Myriam Germain; Vincent Mercier; Annie Guérin-Lebourg; Agathe Revallier; Sabine Houot. Trace metal availability in soil horizons amended with various urban waste composts during 17 years – Monitoring and modelling. Science of The Total Environment 2018, 651, 2961 -2974.

AMA Style

Philippe Cambier, Aurélia Michaud, Remigio Paradelo, Myriam Germain, Vincent Mercier, Annie Guérin-Lebourg, Agathe Revallier, Sabine Houot. Trace metal availability in soil horizons amended with various urban waste composts during 17 years – Monitoring and modelling. Science of The Total Environment. 2018; 651 ():2961-2974.

Chicago/Turabian Style

Philippe Cambier; Aurélia Michaud; Remigio Paradelo; Myriam Germain; Vincent Mercier; Annie Guérin-Lebourg; Agathe Revallier; Sabine Houot. 2018. "Trace metal availability in soil horizons amended with various urban waste composts during 17 years – Monitoring and modelling." Science of The Total Environment 651, no. : 2961-2974.

Short communication
Published: 01 September 2018 in Scientia Horticulturae
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Humectant agents are used to improve seed germination and survival in hard environments through their effect on water-holding capacity. In this work, we have evaluated the combined effect of substrate composition and humectant agents on the water-holding capacity and growth of Lolium multiflorum in different mixtures based on municipal solid waste composts. A commercial polyacrylamide, bentonite or guar gum have been added to mixtures of two municipal solid waste composts with either manure vermicompost or pine bark compost. Water-holding capacity of the substrates and plant production after five weeks in the greenhouse were evaluated. Only bentonite increased water retention of the substrates, likely because the compost-based substrates already presented high water retention. None of the humectant agents had significant effects on the growth of Lolium multiflorum. The use of bentonite can be recommended for increasing water-holding capacity of organic substrates in this case, but given the overall small effects of the humectant agents, an adequate choice of the organic materials could suffice for the formulation of adequate plant substrates in this case.

ACS Style

R. Paradelo; R. Basanta; Maria Teresa Barral. Water-holding capacity and plant growth in compost-based substrates modified with polyacrylamide, guar gum or bentonite. Scientia Horticulturae 2018, 243, 344 -349.

AMA Style

R. Paradelo, R. Basanta, Maria Teresa Barral. Water-holding capacity and plant growth in compost-based substrates modified with polyacrylamide, guar gum or bentonite. Scientia Horticulturae. 2018; 243 ():344-349.

Chicago/Turabian Style

R. Paradelo; R. Basanta; Maria Teresa Barral. 2018. "Water-holding capacity and plant growth in compost-based substrates modified with polyacrylamide, guar gum or bentonite." Scientia Horticulturae 243, no. : 344-349.

Journal article
Published: 19 April 2018 in Soil Systems
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Long-term bare fallow (LTBF) experiments with historical sample archives offer unique opportunities to study long-term impacts of anthropogenic activities on mineral soil fractions. In natural agro- and ecosystems, such impacts are often masked by organic matter due to its buffering action and rapid turnover. The 42-plot LTBF trial of INRA (Institut National de la Recherche Agronomique) started in Versailles (France) in 1928 to assess the impacts of prolonged application of fertilizers and amendments on the composition and properties of loamy soils. Here, we established geochemical budgets of major and trace elements on surface samples from 1929 and 2014 for four groups of treatments relevant for developed soil processes. We considered accompanying effects of soil compaction or decompaction due to changing physicochemical conditions over 85 years. Element losses from the surface horizon were quantified via fertilization-induced or -amplified soil processes: clay leaching favored by Na- or K-based fertilization, and lixiviation of major and trace elements in acidic or alkaline soil conditions. Enhanced mineral weathering was shown for acidified and nonamended plots. Conclusions on trace metal migration were confirmed by selected analyses on subsurface horizons. Additional information was provided on specific element inputs via fertilizers and/or diffuse inputs via atmospheric deposition.

ACS Style

Folkert Van Oort; Remigio Paradelo; Nicolas Proix; Ghislaine Delarue; Denis Baize; Fabrice Monna. Centennial Fertilization-Induced Soil Processes Control Trace Metal Dynamics. Lessons from a Long-Term Bare Fallow Experiment. Soil Systems 2018, 2, 23 .

AMA Style

Folkert Van Oort, Remigio Paradelo, Nicolas Proix, Ghislaine Delarue, Denis Baize, Fabrice Monna. Centennial Fertilization-Induced Soil Processes Control Trace Metal Dynamics. Lessons from a Long-Term Bare Fallow Experiment. Soil Systems. 2018; 2 (2):23.

Chicago/Turabian Style

Folkert Van Oort; Remigio Paradelo; Nicolas Proix; Ghislaine Delarue; Denis Baize; Fabrice Monna. 2018. "Centennial Fertilization-Induced Soil Processes Control Trace Metal Dynamics. Lessons from a Long-Term Bare Fallow Experiment." Soil Systems 2, no. 2: 23.

Journal article
Published: 01 February 2018 in Ecotoxicology and Environmental Safety
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Interaction with soil components is one of the key processes governing the fate of agrochemicals in the environment. In this work, we studied the adsorption / desorption and transport of mecoprop (methylchlorophenoxypropionic acid or MCPP) in four acid sandy-loam soils with different organic matter contents. Kinetics of adsorption and adsorption/desorption at equilibrium were studied in batch experiments, whereas transport was studied in laboratory columns. Adsorption and desorption were found to be linear or nearly-linear. The kinetics of mecoprop adsorption were relatively fast in all cases (less than 24h). Adsorption and desorption were adequately described by the linear and Freundlich models, with KF values that ranged from 0.7 to 8.8L(n) µmol(1-n)kg(-1) and KD values from 0.3 to 3.6Lkg(-1). The results of the transport experiments showed that the retention of mecoprop by soil was very low (less than 6.2%). The retention of mecoprop by the soils in all experiments increased with organic matter content. Overall, it was observed that mecoprop was weakly adsorbed by the soils, what would result in a high risk of leaching of this compound in the environment.

ACS Style

R. Paradelo; M. Conde-Cid; Elodie Martin Abad; Juan Carlos Nóvoa-Muñoz; D. Fernández-Calviño; M. Arias-Estévez. Retention and transport of mecoprop on acid sandy-loam soils. Ecotoxicology and Environmental Safety 2018, 148, 82 -88.

AMA Style

R. Paradelo, M. Conde-Cid, Elodie Martin Abad, Juan Carlos Nóvoa-Muñoz, D. Fernández-Calviño, M. Arias-Estévez. Retention and transport of mecoprop on acid sandy-loam soils. Ecotoxicology and Environmental Safety. 2018; 148 ():82-88.

Chicago/Turabian Style

R. Paradelo; M. Conde-Cid; Elodie Martin Abad; Juan Carlos Nóvoa-Muñoz; D. Fernández-Calviño; M. Arias-Estévez. 2018. "Retention and transport of mecoprop on acid sandy-loam soils." Ecotoxicology and Environmental Safety 148, no. : 82-88.

Journal article
Published: 01 May 2017 in Geoderma
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ACS Style

M. Conde-Cid; Remigio Paradelo; D. Fernández-Calviño; C. Pérez-Novo; J.C. Nóvoa-Múñoz; M. Arias-Estévez. Retention of quaternary ammonium herbicides by acid vineyard soils with different organic matter and Cu contents. Geoderma 2017, 293, 26 -33.

AMA Style

M. Conde-Cid, Remigio Paradelo, D. Fernández-Calviño, C. Pérez-Novo, J.C. Nóvoa-Múñoz, M. Arias-Estévez. Retention of quaternary ammonium herbicides by acid vineyard soils with different organic matter and Cu contents. Geoderma. 2017; 293 ():26-33.

Chicago/Turabian Style

M. Conde-Cid; Remigio Paradelo; D. Fernández-Calviño; C. Pérez-Novo; J.C. Nóvoa-Múñoz; M. Arias-Estévez. 2017. "Retention of quaternary ammonium herbicides by acid vineyard soils with different organic matter and Cu contents." Geoderma 293, no. : 26-33.

Journal article
Published: 01 May 2017 in Journal of Environmental Management
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The European Community Bureau of Reference method (BCR) was used for evaluating the effects of pine bark amendment (0, 24 and 48 g kg) and ageing (1 and 30 days) on Cd, Cu, Ni, Pb and Zn fractionation, on samples from an acid mine soil. In addition, the stirred flow chamber technique was applied for analyzing heavy metals desorption from the unamended and pine bark amended mine soil. When the unamended soil were not subjected to ageing, the added heavy metals were mainly accumulated as soluble fraction (>90% for Cd, Ni and Zn; 71% for Cu; and 45% for Pb). Pine bark amendment and ageing had little effect on Cd, Ni and Zn fractionation, whereas important changes were detected for Cu and Pb in response to both pine bark amendment and ageing (decrease in the soluble fractions, and increase in less mobile fractions). Desorption experiments showed that both pine bark amendment and ageing decreased heavy metals release from the mine soil. The results of this study indicate that pine bark amendment could be used to increase heavy metals retention (especially in the case of Cu and Pb) in acid mine soils, thus reducing the risks of metal transfer to uncontaminated environmental zones.

ACS Style

David Fernández-Calviño; Laura Cutillas-Barreiro; Remigio Paradelo-Núñez; Juan Carlos Nóvoa-Muñoz; María J. Fernández-Sanjurjo; Esperanza Álvarez-Rodríguez; Avelino Núñez-Delgado; Manuel Arias-Estévez. Heavy metals fractionation and desorption in pine bark amended mine soils. Journal of Environmental Management 2017, 192, 79 -88.

AMA Style

David Fernández-Calviño, Laura Cutillas-Barreiro, Remigio Paradelo-Núñez, Juan Carlos Nóvoa-Muñoz, María J. Fernández-Sanjurjo, Esperanza Álvarez-Rodríguez, Avelino Núñez-Delgado, Manuel Arias-Estévez. Heavy metals fractionation and desorption in pine bark amended mine soils. Journal of Environmental Management. 2017; 192 ():79-88.

Chicago/Turabian Style

David Fernández-Calviño; Laura Cutillas-Barreiro; Remigio Paradelo-Núñez; Juan Carlos Nóvoa-Muñoz; María J. Fernández-Sanjurjo; Esperanza Álvarez-Rodríguez; Avelino Núñez-Delgado; Manuel Arias-Estévez. 2017. "Heavy metals fractionation and desorption in pine bark amended mine soils." Journal of Environmental Management 192, no. : 79-88.

Original paper
Published: 11 April 2017 in Waste and Biomass Valorization
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The high concentrations of metals naturally present in soils developed on mafic and ultramafic rocks such as amphibolite could be mobilized in response to modification of soil physicochemical properties after compost amendment. However, so far, research with this type of soils is insufficient. With the objective of understanding the potential risk associated to trace elements in this case, we have studied the chemical distribution of trace metals in an amphibolite agricultural soil amended with several composts and incubated during 3 months in the laboratory. An agricultural acid soil developed on amphibolites was amended with 5% (dry weight) of five commercial composts (produced mainly from municipal solid wastes) and incubated in the laboratory during 90 days. Trace element potential mobility and bioavailability in the soils were studied by means of chemical analyses: extraction of immediately available trace elements with 0.01 N CaCl2 and the normalized BCR sequential extraction procedure. High concentrations of 0.01 N CaCl2 soluble metals occurred in the non-amended soil (especially Zn and Ni), that decreased after compost addition for Pb, Zn, Ni and Cd, with no effect on Cu and Cr. In general, composts had little effect on the BCR fractionation of the trace elements, because of their high native concentrations in the studied soil. Even so, the addition of the composts with the highest metal contents increased the oxidizable (organic matter-bound) and reducible (iron oxides-bound) fractions of soil Cu and the soluble and reducible fractions of soil Zn and Ni. None of the composts modified Pb fractionation, which was mostly found in the reducible fraction, nor that of Cr, present in more than 80% in the residual non-extractable fraction. This study showed that, in soils developed over metal-rich parent materials such as amphibolites, chemical fractionation of metals after compost amendment is more influenced by the nature of the metals previously present in soil than by the composition of the composts.

ACS Style

Remigio Paradelo; Antía Villada; Maria Teresa Barral. Chemical Fractionation of Trace Elements in a Metal-Rich Amphibolite Soil Amended with Municipal Solid Waste Composts. Waste and Biomass Valorization 2017, 9, 1935 -1943.

AMA Style

Remigio Paradelo, Antía Villada, Maria Teresa Barral. Chemical Fractionation of Trace Elements in a Metal-Rich Amphibolite Soil Amended with Municipal Solid Waste Composts. Waste and Biomass Valorization. 2017; 9 (10):1935-1943.

Chicago/Turabian Style

Remigio Paradelo; Antía Villada; Maria Teresa Barral. 2017. "Chemical Fractionation of Trace Elements in a Metal-Rich Amphibolite Soil Amended with Municipal Solid Waste Composts." Waste and Biomass Valorization 9, no. 10: 1935-1943.

Journal article
Published: 01 January 2017 in Chemosphere
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The use of organic biosorbents for anion removal from water has been less studied than for cationic compounds. In this work, the removal capacity of pine bark for potential anionic pollutants (fluoride, phosphate, arsenate and dichromate) was assessed in column experiments, designed to study the process of transport. The results showed that pine bark has a very low retention capacity for phosphate, arsenate or fluoride, and in turn, very high for dichromate, with retention values close to 100% and less than 2% desorption of the adsorbed dichromate. The large differences observed between anions suggest that differences in the retention mechanism of each anion exist. In the case of phosphate and arsenate, electrostatic interactions with the mostly negatively charged functional groups of the pine bark determine the low retention capacity. Dichromate retention might proceed through reduction of chromium (VI) to chromium (III), what improves the efficiency of the removal.

ACS Style

R. Paradelo; Manuel Conde; M. Arias-Estévez; Juan Carlos Nóvoa-Muñoz; Esperanza Álvarez; María J. Fernández-Sanjurjo; Avelino Núñez-Delgado. Removal of anionic pollutants by pine bark is influenced by the mechanism of retention. Chemosphere 2017, 167, 139 -145.

AMA Style

R. Paradelo, Manuel Conde, M. Arias-Estévez, Juan Carlos Nóvoa-Muñoz, Esperanza Álvarez, María J. Fernández-Sanjurjo, Avelino Núñez-Delgado. Removal of anionic pollutants by pine bark is influenced by the mechanism of retention. Chemosphere. 2017; 167 ():139-145.

Chicago/Turabian Style

R. Paradelo; Manuel Conde; M. Arias-Estévez; Juan Carlos Nóvoa-Muñoz; Esperanza Álvarez; María J. Fernández-Sanjurjo; Avelino Núñez-Delgado. 2017. "Removal of anionic pollutants by pine bark is influenced by the mechanism of retention." Chemosphere 167, no. : 139-145.

Journal article
Published: 01 December 2016 in Ecological Engineering
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Remigio Paradelo; Manuel Conde; L. Cutillas-Barreiro; M. Arias-Estévez; Juan Carlos Nóvoa-Muñoz; Esperanza Álvarez; María J. Fernández-Sanjurjo; Avelino Núñez-Delgado. Phosphorus removal from wastewater using mussel shell: Investigation on retention mechanisms. Ecological Engineering 2016, 97, 558 -566.

AMA Style

Remigio Paradelo, Manuel Conde, L. Cutillas-Barreiro, M. Arias-Estévez, Juan Carlos Nóvoa-Muñoz, Esperanza Álvarez, María J. Fernández-Sanjurjo, Avelino Núñez-Delgado. Phosphorus removal from wastewater using mussel shell: Investigation on retention mechanisms. Ecological Engineering. 2016; 97 ():558-566.

Chicago/Turabian Style

Remigio Paradelo; Manuel Conde; L. Cutillas-Barreiro; M. Arias-Estévez; Juan Carlos Nóvoa-Muñoz; Esperanza Álvarez; María J. Fernández-Sanjurjo; Avelino Núñez-Delgado. 2016. "Phosphorus removal from wastewater using mussel shell: Investigation on retention mechanisms." Ecological Engineering 97, no. : 558-566.

Journal article
Published: 01 October 2016 in Geoderma
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Focusing on P, we used batch-type experiments to study P retention on various materials: a forest soil sample, a vineyard soil sample, finely and coarsely ground mussel shell, pine-sawdust, pyritic material, granitic material, mussel shell calcination ash, slate processing fines, and three different mixtures that included three components: sewage sludge, mussel shell ash, and calcined mussel shell or pine wood ash. The pyritic material and the mussel shell ash showed the highest P retention capacity, reaching > 95%. The lowest P retention (< 60%) corresponded to the pine-sawdust and slate processing fines. Data fitted satisfactorily to the Freundlich model, unless in the case of pine-sawdust and slate fines; however, only forest and vineyard soil samples can be satisfactorily adjusted to the Langmuir model. These results could be useful to program appropriate management practices, especially when focusing on controlling P concentrations in different environmental compartments, as well as to correctly recycle the by-products and waste materials assayed.

ACS Style

Aurora Romar-Gasalla; Ivana M. Rivas-Pérez; Remigio Paradelo; Juan Carlos Nóvoa-Muñoz; Manuel Arias-Estévez; María J. Fernández-Sanjurjo; Esperanza Álvarez; Avelino Núñez-Delgado. Phosphorus retention on forest and vineyard soil samples, mussel shell, pine-sawdust, and on pyritic, granitic and waste materials. Geoderma 2016, 280, 8 -13.

AMA Style

Aurora Romar-Gasalla, Ivana M. Rivas-Pérez, Remigio Paradelo, Juan Carlos Nóvoa-Muñoz, Manuel Arias-Estévez, María J. Fernández-Sanjurjo, Esperanza Álvarez, Avelino Núñez-Delgado. Phosphorus retention on forest and vineyard soil samples, mussel shell, pine-sawdust, and on pyritic, granitic and waste materials. Geoderma. 2016; 280 ():8-13.

Chicago/Turabian Style

Aurora Romar-Gasalla; Ivana M. Rivas-Pérez; Remigio Paradelo; Juan Carlos Nóvoa-Muñoz; Manuel Arias-Estévez; María J. Fernández-Sanjurjo; Esperanza Álvarez; Avelino Núñez-Delgado. 2016. "Phosphorus retention on forest and vineyard soil samples, mussel shell, pine-sawdust, and on pyritic, granitic and waste materials." Geoderma 280, no. : 8-13.

Journal article
Published: 01 September 2016 in Journal of Cleaner Production
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Taking into account a background situation where some industrial activities greatly influence fluoride pollution, while other industries generate by-products that could be effective as fluoride bio-sorbents, and bearing in mind sustainability and environmental concern, batch-type experiments were performed to study fluoride sorption/desorption on individual (un-amended) and mussel shell-amended soils and materials. Specifically, the research focused on a forest soil, a vineyard soil, pyritic material, granitic material, and ground mussel shell, as well as on both soils and the pyritic and granitic materials amended with mussel shell. The main findings of the research indicate that the shell amendment clearly increased fluoride sorption in the pyritic material (reaching more than 90%), showing no effect as regards fluoride desorption from this material. The amendment caused a slight increase in fluoride sorption on forest soil, as well as a slight decrease in fluoride desorption from it. The un-amended vineyard soil and the un-amended granitic material had lower fluoride-retention capacity than the forest soil and pyritic material, and it did not change after amending with mussel shell. The mussel shell by itself showed the lowest fluoride-retention potential among the tested materials. As a conclusion, and focusing on applicability, these results can be useful to program the correct use of mussel shell amendment on soils and even on degraded environments with the aim of increasing fluoride retention or removal, thus decreasing risk of environmental pollution due to excessive fluoride concentrations in solid and/or liquid media, also facilitating recycling, sustainability and cleaner production in the mussel shell industry.

ACS Style

Ana Quintáns-Fondo; Gustavo Ferreira-Coelho; Remigio Paradelo; Juan Carlos Nóvoa-Muñoz; Manuel Arias-Estévez; María J. Fernández-Sanjurjo; Esperanza Álvarez; Avelino Núñez-Delgado. Promoting sustainability in the mussel industry: mussel shell recycling to fight fluoride pollution. Journal of Cleaner Production 2016, 131, 485 -490.

AMA Style

Ana Quintáns-Fondo, Gustavo Ferreira-Coelho, Remigio Paradelo, Juan Carlos Nóvoa-Muñoz, Manuel Arias-Estévez, María J. Fernández-Sanjurjo, Esperanza Álvarez, Avelino Núñez-Delgado. Promoting sustainability in the mussel industry: mussel shell recycling to fight fluoride pollution. Journal of Cleaner Production. 2016; 131 ():485-490.

Chicago/Turabian Style

Ana Quintáns-Fondo; Gustavo Ferreira-Coelho; Remigio Paradelo; Juan Carlos Nóvoa-Muñoz; Manuel Arias-Estévez; María J. Fernández-Sanjurjo; Esperanza Álvarez; Avelino Núñez-Delgado. 2016. "Promoting sustainability in the mussel industry: mussel shell recycling to fight fluoride pollution." Journal of Cleaner Production 131, no. : 485-490.