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Mine tailing storage represents an important environmental issue. The generation and dispersal of dust from mine tailings can contaminate air and surrounding soils. In addition, metals and soluble salts present in these wastes could pollute groundwater and surface water. The recovery of metals from mine tailings can contribute to minimize the environmental risk and to achieve a circular economy model. The main objective of the present work is to study the use of two carbon-based materials, a commercial activated carbon (AC) and a commercial charcoal (VC) in the leaching of zinc and copper from low-grade tailing waste. Experimental results obtained show that it is possible to achieve the recovery of more than 87 wt% of Zn after 6 h of leaching with different sulfuric acid solutions. The addition of carbon-based materials increases the extraction of Zn at high sulfuric acid concentrations (1 M) from 89% to 99%. The addition of VC significantly increases the extraction of Cu in leaching solution with high sulfuric acid concentration (1 M), from 41 to 61%. Future research will be necessary to optimize the properties of carbon-based materials and their recovery after leaching experiments in order to assess their potential for industrial application.
María Álvarez; Ana Méndez; Roberto Rodríguez-Pacheco; Jorge Paz-Ferreiro; Gabriel Gascó. Recovery of Zinc and Copper from Mine Tailings by Acid Leaching Solutions Combined with Carbon-Based Materials. Applied Sciences 2021, 11, 5166 .
AMA StyleMaría Álvarez, Ana Méndez, Roberto Rodríguez-Pacheco, Jorge Paz-Ferreiro, Gabriel Gascó. Recovery of Zinc and Copper from Mine Tailings by Acid Leaching Solutions Combined with Carbon-Based Materials. Applied Sciences. 2021; 11 (11):5166.
Chicago/Turabian StyleMaría Álvarez; Ana Méndez; Roberto Rodríguez-Pacheco; Jorge Paz-Ferreiro; Gabriel Gascó. 2021. "Recovery of Zinc and Copper from Mine Tailings by Acid Leaching Solutions Combined with Carbon-Based Materials." Applied Sciences 11, no. 11: 5166.
Production of high value biochemicals from lignocellulose biomass via pyrolysis, particularly levoglucosan (LG) has received immense attention in recent years. LG production via fast pyrolysis has recorded a continuous development over the past years, which demands a state-of-the-art review, covering the LG recovery methods and commercial feasibility analysis of the process. This paper provides an in-depth review of the progress and current status of bio-LG production with a focus on formation mechanisms, influential variables, recovery methods and techno-economic prospects. Based on the experimental findings of the previous studies, this review concluded that the LG yield from biomass via pyrolysis could be proposed as a function of biomass structural properties, cellulose content, inorganic minerals content as well as pyrolysis process conditions. An essential aspect of maximising the overall efficiency of LG production process is the adoption of efficient in-situ or post-pyrolysis LG extraction techniques, which has been critically reviewed for the first time. The paper also summarises the techno-commercial assessment studies of LG facility, highlighting the limiting factors towards the economic attractiveness of the process. Finally, the review highlights the knowledge gaps and provides future recommendations, which will be helpful for the improvement of productivity and economic feasibility of bio-LG production process.
Ibrahim Gbolahan Hakeem; Pobitra Halder; Mojtaba Hedayati Marzbali; Savankumar Patel; Sazal Kundu; Jorge Paz-Ferreiro; Aravind Surapaneni; Kalpit Shah. Research progress on levoglucosan production via pyrolysis of lignocellulosic biomass and its effective recovery from bio-oil. Journal of Environmental Chemical Engineering 2021, 9, 105614 .
AMA StyleIbrahim Gbolahan Hakeem, Pobitra Halder, Mojtaba Hedayati Marzbali, Savankumar Patel, Sazal Kundu, Jorge Paz-Ferreiro, Aravind Surapaneni, Kalpit Shah. Research progress on levoglucosan production via pyrolysis of lignocellulosic biomass and its effective recovery from bio-oil. Journal of Environmental Chemical Engineering. 2021; 9 (4):105614.
Chicago/Turabian StyleIbrahim Gbolahan Hakeem; Pobitra Halder; Mojtaba Hedayati Marzbali; Savankumar Patel; Sazal Kundu; Jorge Paz-Ferreiro; Aravind Surapaneni; Kalpit Shah. 2021. "Research progress on levoglucosan production via pyrolysis of lignocellulosic biomass and its effective recovery from bio-oil." Journal of Environmental Chemical Engineering 9, no. 4: 105614.
Reverse osmosis concentrate (ROC) resulting from the municipal wastewater recycling processes poses significant environmental and health risks as it contains significant concentrations of harmful compounds, including phenolic chemicals including bisphenol A (BPA). In this study, the effect of ferrate(VI) (or Fe(VI)) oxidation on the degradation of BPA (50 µg L−1) in a typical ROC matrix was investigated. The influence of process variables including the [Fe(VI)]/[BPA] ratios (7–50), initial pH (5.0–8.0) and reaction temperature (15–25 °C) was studied. Fe(VI) was found to be highly effective in degrading BPA in the complex ROC matrix with various operating conditions. At 25 °C, over 90% degradation of BPA was achieved at the [Fe(VI)]/[BPA] ratio of 50, and an initial pH of the ROC at 8.0 after 90 min of reaction. Under such conditions, the reduction in dissolved organic carbon (DOC) was found to be 34% accompanied by a 95% reduction in UV254 absorbance (initial value 0.750 cm−1) with 96.4% SUVA reduction. Additionally, the residual concentration of Fe(III) at pH 8.0 was the lowest compared to other pH conditions at a fixed [Fe(VI)]/[BPA] ratio of 50. Fluorescence regional integration (FRI) analyses revealed that Fe(VI) preferentially react with fulvic acid-like and humic acid-like compounds, and aromatic protein II in the ROC. This indicated Fe(VI) effectively breaking down electron-rich moieties groups including phenols and other organics in ROC. The apparent second-order rate constant (kapp) for BPA degradation was determined to be 2.27 × 102 M−1 s−1 at pH 8.0 at a [Fe(VI)]/[BPA] ratio of 50, and the value of reaction rate constant increased proportionally with increasing molar ratio at the range studied. The effectiveness of Fe(VI) in the degradation of BPA in the ROC demonstrates the potential of using Fe(VI) as an efficient oxidant to remediate the micropollutants present in water and wastewater.
Fitri Widhiastuti; Linhua Fan; Jorge Paz-Ferreiro; Ken Chiang. Oxidative treatment of bisphenol A in municipal wastewater reverse osmosis concentrate using Ferrate(VI). Journal of Environmental Chemical Engineering 2021, 9, 105462 .
AMA StyleFitri Widhiastuti, Linhua Fan, Jorge Paz-Ferreiro, Ken Chiang. Oxidative treatment of bisphenol A in municipal wastewater reverse osmosis concentrate using Ferrate(VI). Journal of Environmental Chemical Engineering. 2021; 9 (4):105462.
Chicago/Turabian StyleFitri Widhiastuti; Linhua Fan; Jorge Paz-Ferreiro; Ken Chiang. 2021. "Oxidative treatment of bisphenol A in municipal wastewater reverse osmosis concentrate using Ferrate(VI)." Journal of Environmental Chemical Engineering 9, no. 4: 105462.
This study focuses on the conversion of biosolids to biochar and its further use in adsorbing per- and polyfluoroalkyl substances (PFASs) from contaminated water.
Sazal K Kundu; Savankumar Patel; Pobitra Halder; Tejas Patel; Mojtaba Hedayati Marzbali; Biplob Kumar Pramanik; Jorge Paz-Ferreiro; Cícero Célio de Figueiredo; David Bergmann; Aravind Surapaneni; Mallavarapu Megharaj; Kalpit Shah. Removal of PFASs from biosolids using a semi-pilot scale pyrolysis reactor and the application of biosolids derived biochar for the removal of PFASs from contaminated water. Environmental Science: Water Research & Technology 2020, 7, 638 -649.
AMA StyleSazal K Kundu, Savankumar Patel, Pobitra Halder, Tejas Patel, Mojtaba Hedayati Marzbali, Biplob Kumar Pramanik, Jorge Paz-Ferreiro, Cícero Célio de Figueiredo, David Bergmann, Aravind Surapaneni, Mallavarapu Megharaj, Kalpit Shah. Removal of PFASs from biosolids using a semi-pilot scale pyrolysis reactor and the application of biosolids derived biochar for the removal of PFASs from contaminated water. Environmental Science: Water Research & Technology. 2020; 7 (3):638-649.
Chicago/Turabian StyleSazal K Kundu; Savankumar Patel; Pobitra Halder; Tejas Patel; Mojtaba Hedayati Marzbali; Biplob Kumar Pramanik; Jorge Paz-Ferreiro; Cícero Célio de Figueiredo; David Bergmann; Aravind Surapaneni; Mallavarapu Megharaj; Kalpit Shah. 2020. "Removal of PFASs from biosolids using a semi-pilot scale pyrolysis reactor and the application of biosolids derived biochar for the removal of PFASs from contaminated water." Environmental Science: Water Research & Technology 7, no. 3: 638-649.
Thermal treatment by pyrolysis has been proposed as a sustainable alternative to enable the agricultural use of sewage sludge (SS). The solid product obtained via pyrolysis of SS is called sewage sludge biochar (SSBC) and presents several advantages for its use as a fertilizer or soil conditioner. However, there are concerns about the accumulation and dynamics of trace elements (TEs) in soil amended with SSBC over the years. This study examined the effect of SSBC, under field conditions for five years, on the accumulation and availability of TEs in a tropical soil. For this, 15 t ha–1 of SSBC produced at 300 and 500°C were applied in the first two growing seasons. Application was interrupted from the third to the fifth seasons to assess the residual effect of SSBC in the soil. The total and available TE concentrations were determined. The total contents of TEs showed the following variation in the soil over the five years (mg kg–1): Cd (16.8‐20.0), Co (19.5‐21.5), Cr (98.2‐125.7), Cu (8.1‐17.1), Mn (62.9‐85.7), Ni (20.3‐35.0), Pb (27.0‐52.4) and Zn (20.3‐35.8). There was no change in the availability of Cd, Cr, Ni and Pb over the years. Additionally, a residual effect of the SSBC was the increase in availability of TEs that are considered essential (Cu, Mn and Zn) and beneficial elements (Co) for plants. Therefore, in relation to contamination by TEs, the pyrolysis of SS of domestic origin proved to be an adequate strategy to enable the safe use of this residue in tropical agriculture. This article is protected by copyright. All rights reserved
Jhon Kenedy Moura Chagas; Cícero Célio de Figueiredo; Juscimar da Silva; Kalpit Shah; Jorge Paz‐Ferreiro. Long‐term effects of sewage sludge–derived biochar on the accumulation and availability of trace elements in a tropical soil. Journal of Environmental Quality 2020, 50, 264 -277.
AMA StyleJhon Kenedy Moura Chagas, Cícero Célio de Figueiredo, Juscimar da Silva, Kalpit Shah, Jorge Paz‐Ferreiro. Long‐term effects of sewage sludge–derived biochar on the accumulation and availability of trace elements in a tropical soil. Journal of Environmental Quality. 2020; 50 (1):264-277.
Chicago/Turabian StyleJhon Kenedy Moura Chagas; Cícero Célio de Figueiredo; Juscimar da Silva; Kalpit Shah; Jorge Paz‐Ferreiro. 2020. "Long‐term effects of sewage sludge–derived biochar on the accumulation and availability of trace elements in a tropical soil." Journal of Environmental Quality 50, no. 1: 264-277.
Biochars and hydrochars have a significant effect on soil properties linked to fertility or to carbon cycling and have been proposed as an amendment to increase soil productivity, particularly in acidic soils. Phytotoxic forms of aluminium (Al) are relatively abundant in acidic soils and, for a long period of time, liming has been used to correct this. Ca(OH)2, a pig manure (PM) and two biochars and two hydrochars prepared from pig manure were studied for their effects on Al fractions. Biochars were prepared at 450 °C (BPC450) and 600 °C (BPC600) and hydrochars were obtained using a pig manure solution (ratio 30:70) that was heated at 200 °C (HPC200) and 240 °C (HPC240). A treatment with an amount of Ca(OH)2 necessary to increase soil pH to the same pH value as the average in the treatments BPC450, BPC600, HPC200, HPC240 and PM was used for comparison. The fractionation of Al was studied, with the liming treatment allowing the differentiation between changes in fractionation driven by pH changes from other mechanisms. In relation to the control, all soil amendments presented high capacity of controlling toxic Al, similar to a traditional liming product (Ca(OH)2) and decreased the exchangeable Al extracted by NH4Cl. Both types of materials (biochars and hydrochars) lead to the formation of an increased number of organo-aluminium complexes (OAC). Biochars lead to the formation of OAC of low to medium stability, while hydrochars promoted the formation of OAC of high stability.
Jorge Paz-Ferreiro; María Luisa Álvarez-Calvo; Cícero Célio De Figueiredo; Ana-Maria Mendez; Gabriel Gascó. Effect of Biochar and Hydrochar on Forms of Aluminium in an Acidic Soil. Applied Sciences 2020, 10, 7843 .
AMA StyleJorge Paz-Ferreiro, María Luisa Álvarez-Calvo, Cícero Célio De Figueiredo, Ana-Maria Mendez, Gabriel Gascó. Effect of Biochar and Hydrochar on Forms of Aluminium in an Acidic Soil. Applied Sciences. 2020; 10 (21):7843.
Chicago/Turabian StyleJorge Paz-Ferreiro; María Luisa Álvarez-Calvo; Cícero Célio De Figueiredo; Ana-Maria Mendez; Gabriel Gascó. 2020. "Effect of Biochar and Hydrochar on Forms of Aluminium in an Acidic Soil." Applied Sciences 10, no. 21: 7843.
Biochar is a carbon-rich solid obtained from the pyrolysis of organic feedstock under limited oxygen and at relatively low temperatures
Jorge Paz-Ferreiro; Ana-Maria Méndez; Gabriel Gascó; Cícero Célio De Figueiredo. Special Issue on “Environmental Applications of Biochar”. Applied Sciences 2020, 10, 6076 .
AMA StyleJorge Paz-Ferreiro, Ana-Maria Méndez, Gabriel Gascó, Cícero Célio De Figueiredo. Special Issue on “Environmental Applications of Biochar”. Applied Sciences. 2020; 10 (17):6076.
Chicago/Turabian StyleJorge Paz-Ferreiro; Ana-Maria Méndez; Gabriel Gascó; Cícero Célio De Figueiredo. 2020. "Special Issue on “Environmental Applications of Biochar”." Applied Sciences 10, no. 17: 6076.
Land degradation by old mining activities is a concern worldwide. However, many known technologies are expensive and cannot be considered for mining soil restoration. Biochar amendment of mining soils is becoming an interesting alternative to traditional technologies due to an improvement in soil properties and metal mobility reduction. Biochar effects depend on soil and biochar properties, which in turn vary with pyrolysis conversion parameters and the feedstock used. The objective of this study is to evaluate the effect of four biochars prepared from poultry and rabbit manure at two pyrolysis temperatures (450 and 600 °C) in the trace metal mobility, CO2 emissions, and enzymatic activity of 10 mining soils located in three historical mining areas of Spain (Zarandas-Andalusia, Mijarojos-Cantabria, and Portman-Murcia). For this reason, soils were amended with biochars at a rate of 10% (w/w), and different treatments were incubated for 180 days. For acid soils of the Zarandas-Andalusia area, biochar addition reduced the mobility of Ni, Zn, Cd, Pb, and Cr, respectively, by 91%, 81%, 29%, 67%, and 70%. Nevertheless, biochars did not exhibit the same efficiency in the other two areas where alkaline soils were predominant. CO2 emissions generally increased in the treated soils. The application of biochars produced at 600 °C reduced CO2 emissions, in some cases by more than 28%, being an adequate strategy for C sequestration in soil. The results showed that application of manure biochars can be an effective technique to reduce the mobility of metals in multi-contaminated acid soils, while reducing metal toxicity for soil microorganisms.
María Luisa Álvarez; Ana Méndez; Jorge Paz-Ferreiro; Gabriel Gascó. Effects of Manure Waste Biochars in Mining Soils. Applied Sciences 2020, 10, 3393 .
AMA StyleMaría Luisa Álvarez, Ana Méndez, Jorge Paz-Ferreiro, Gabriel Gascó. Effects of Manure Waste Biochars in Mining Soils. Applied Sciences. 2020; 10 (10):3393.
Chicago/Turabian StyleMaría Luisa Álvarez; Ana Méndez; Jorge Paz-Ferreiro; Gabriel Gascó. 2020. "Effects of Manure Waste Biochars in Mining Soils." Applied Sciences 10, no. 10: 3393.
Per- and polyfluoroalkyl substances (PFAS) are ubiquitous global environmental contaminants, environmentally persistent, mobile, can bioaccumulate and are toxic. Increasing emphasis is placed on the immobilisation and removal of PFAS from contaminated environmental matrices such as: potable water, surface water, groundwater, wastewater, sediments and soils (Dauchy et al., 2017; Cao et al., 2019; Hepburn et al., 2019). To achieve this, development of PFAS sorbents is increasingly undertaken (Du et al., 2014). Sorption studies are used to observe the interaction of sorbent and sorbate, but have two key limitations when undertaking sorption experiments for PFAS (1) the experimental protocol and (2) analytical techniques. The current batch sorption methods approached recommended by OECD Guideline 106 (OECD, 2000) are problematic, firstly, due to large sample numbers and PFAS specific laboratory difficulties, including near ubiquitous background PFAS contamination. Secondly, PFAS analytical techniques currently require solid-phase extraction (SPE) to be employed, which is slow and expensive, prior to instrumental analysis with liquid chromatography-mass spectrometry (LC-MS). A suitable alternative approach is needed to mitigate the drawbacks of current methodologies whilst catering for the high sample throughput required by benchtop trials characterising the sorption behaviour of PFAS - sorbent pairings.
Matthew Askeland; Bradley Clarke; Jorge Paz-Ferreiro. A serial PFASs sorption technique coupled with adapted high volume direct aqueous injection LCMS method. MethodsX 2020, 7, 100886 .
AMA StyleMatthew Askeland, Bradley Clarke, Jorge Paz-Ferreiro. A serial PFASs sorption technique coupled with adapted high volume direct aqueous injection LCMS method. MethodsX. 2020; 7 ():100886.
Chicago/Turabian StyleMatthew Askeland; Bradley Clarke; Jorge Paz-Ferreiro. 2020. "A serial PFASs sorption technique coupled with adapted high volume direct aqueous injection LCMS method." MethodsX 7, no. : 100886.
In recent times, there has been increased focus on a holistic approach to soil remediation with consideration of social, economic and environmental factors. Consequently, there is a demand from practitioners and regulators alike for suitable ways to measure ancillary outcomes, for example, effects on soil quality. Here we show that biochar, when applied to land to remediate lead (Pb)-contaminated soils, can lead to environmental improvements not realized by adding mined or manufactured phosphates. Here, we study a Pb-contaminated soil amended with two phosphate fertilizers (slow- and fast-release) and with biochars produced from poultry litter and from biosolids at three temperatures (300 °C, 400 °C and 500 °C). The results show that, unlike the fast-release P fertilizer, biochars did not result in an increase in the amount of leachable P that could be released into the environment. Biochars prepared at 500 °C presented a higher value of the integrative geometric mean of soil enzyme activity, compared to the P fertilizers. Overall, our research shows that biochars, particularly those prepared at the higher temperature tested, are a suitable alternative to P fertilizers as an integrative remediation strategy in Pb-contaminated soils, enabling soil biological restoration.
Pacian Netherway; Gabriel Gascó; Ana Méndez; Aravind Surapaneni; Suzie Reichman; Kalpit Shah; Jorge Paz-Ferreiro. Using Phosphorus-Rich Biochars to Remediate Lead-Contaminated Soil: Influence on Soil Enzymes and Extractable P. Agronomy 2020, 10, 454 .
AMA StylePacian Netherway, Gabriel Gascó, Ana Méndez, Aravind Surapaneni, Suzie Reichman, Kalpit Shah, Jorge Paz-Ferreiro. Using Phosphorus-Rich Biochars to Remediate Lead-Contaminated Soil: Influence on Soil Enzymes and Extractable P. Agronomy. 2020; 10 (4):454.
Chicago/Turabian StylePacian Netherway; Gabriel Gascó; Ana Méndez; Aravind Surapaneni; Suzie Reichman; Kalpit Shah; Jorge Paz-Ferreiro. 2020. "Using Phosphorus-Rich Biochars to Remediate Lead-Contaminated Soil: Influence on Soil Enzymes and Extractable P." Agronomy 10, no. 4: 454.
L Bahcivanji; G Gascó; J Paz-Ferreiro; A Méndez. The effect of post-pyrolysis treatment on waste biomass derived hydrochar. 2020, 106, 55 -61.
AMA StyleL Bahcivanji, G Gascó, J Paz-Ferreiro, A Méndez. The effect of post-pyrolysis treatment on waste biomass derived hydrochar. . 2020; 106 ():55-61.
Chicago/Turabian StyleL Bahcivanji; G Gascó; J Paz-Ferreiro; A Méndez. 2020. "The effect of post-pyrolysis treatment on waste biomass derived hydrochar." 106, no. : 55-61.
Hydrochars are materials with a promising future, as their high carbon content and porosity renders them suitable for uses including peat substitutes, soil remediation and carbon adsorbent precursors. Combining hydrothermal carbonization and pyrolysis offers the prospect to provide advanced materials with a higher porosity and carbon content. This approach would mitigate drawbacks associated to hydrochars, including phytotoxicity. This research studied the influence of pyrolysis temperature and heating time on the resulting properties of chars made from hydrothermal carbonization of biomass wastes at 200 °C for 4 h and compared them to biochars that had not received any prior hydrothermal carbonization. Interestingly, hydrochar followed by pyrolysis was able to result in phytostimulation, while, when only pyrolysis was carried out, phytotoxicity was eliminated, but no phytostimulant effect was observed. In addition, the results indicated that the higher and longer the pyrolysis temperature (from 350 to 550 °C) and duration time (from 1 to 5 h), respectively, the more microporosity was generated, while phytotoxicity was reduced. In addition, aromaticity and thermal stability significantly increased with pyrolysis treatment. Consequently, hydrochars improve their properties and offer more potential for environmental applications after a pyrolysis post-treatment.
L. Bahcivanji; G. Gascó; J. Paz-Ferreiro; A. Méndez. The effect of post-pyrolysis treatment on waste biomass derived hydrochar. Waste Management 2020, 106, 55 -61.
AMA StyleL. Bahcivanji, G. Gascó, J. Paz-Ferreiro, A. Méndez. The effect of post-pyrolysis treatment on waste biomass derived hydrochar. Waste Management. 2020; 106 ():55-61.
Chicago/Turabian StyleL. Bahcivanji; G. Gascó; J. Paz-Ferreiro; A. Méndez. 2020. "The effect of post-pyrolysis treatment on waste biomass derived hydrochar." Waste Management 106, no. : 55-61.
A phytoextraction experiment with five Cd hyperaccumulators (Amaranthus hypochondriacus, Celosia argentea, Solanum nigrum, Phytolacca acinosa and Sedum plumbizincicola) was conducted in two soils with different soil pH (5.93 and 7.43, respectively). Most accumulator plants grew better in the acidic soil, with 19.59–39.63% higher biomass than in the alkaline soil, except for S. plumbizincicola. The potential for a metal-contaminated soil to be cleaned up using phytoremediation is determined by the metal uptake capacity of hyperaccumulator, soil properties, and mutual fitness of plant-soil relationships. In the acidic soil, C. argentea and A. hypochondriacus extracted the highest amount of Cd (1.03 mg pot−1 and 0.92 mg pot−1, respectively). In the alkaline soil, S. plumbizincicola performed best, mainly as a result of high Cd accumulation in plant tissue (541.36 mg kg−1). Most plants achieved leaf Cd bioconcentration factor (BCF) of >10 in the acidic soil, compared to <4 in the alkaline soil. Soil Cd availability was chiefly responsible for such contrasting metal extraction capacity, with 5.02% fraction and 48.50% fraction of total Cd being available in the alkaline and acidic soil, respectively. In the alkaline soil, plants tended to increase rhizosphere soil available Cd mainly through excreting more low molecular weight organic acids, not through changing the soil pH. In the acidic soil, plants slightly decreased soil available Cd. Those species which have high Ca, Zn, Fe uptake capacity extract more Cd from soil, and a positive correlation was found between the concentrations of Cd and Ca, Zn, Fe in leaves. Soil available Ca2+, Mg2+, SO42−, Cl− did not play a key role in Cd uptake by plants. In summary, acidic soil was of higher potential to recover from Cd contamination by phytoextraction, while in the alkaline soil, S. plumbizincicola showed potential for Cd phytoextraction.
Rong Huang; Meiliang Dong; Peng Mao; Ping Zhuang; Jorge Paz-Ferreiro; Yongxing Li; Yingwen Li; Xiaoying Hu; Pacian Netherway; Zhian Li. Evaluation of phytoremediation potential of five Cd (hyper)accumulators in two Cd contaminated soils. Science of The Total Environment 2020, 721, 137581 .
AMA StyleRong Huang, Meiliang Dong, Peng Mao, Ping Zhuang, Jorge Paz-Ferreiro, Yongxing Li, Yingwen Li, Xiaoying Hu, Pacian Netherway, Zhian Li. Evaluation of phytoremediation potential of five Cd (hyper)accumulators in two Cd contaminated soils. Science of The Total Environment. 2020; 721 ():137581.
Chicago/Turabian StyleRong Huang; Meiliang Dong; Peng Mao; Ping Zhuang; Jorge Paz-Ferreiro; Yongxing Li; Yingwen Li; Xiaoying Hu; Pacian Netherway; Zhian Li. 2020. "Evaluation of phytoremediation potential of five Cd (hyper)accumulators in two Cd contaminated soils." Science of The Total Environment 721, no. : 137581.
The ability to immobilise PFAS in soil may be an essential interim tool while technologies are developed for effective long-term treatment of PFAS contaminated soils. Serial sorption experiments were undertaken using a pine derived biochar produced at 750 °C (P750). All experiments were carried out either in individual mode (solution with one PFAS at 5 μg/L) or mix mode (solution with 5 μg/L of each: PFOS, PFOA, PFHxS and PFHxA), and carried out in 2:1 water to soil solutions. Soils had biochar added in the range 0–5% w/w. Kinetic data were fitted to the pseudo-second order model for both amended soils, with equilibrium times ranging 0.5–96 h for all congeners. PFOS sorption was 11.1 ± 4.5% in the loamy sand compared to 69.8 ± 4.9% in the sandy clay loam. While total sorption was higher in the unamended loamy sand than sandy clay loam for PFHxA, PFOA and PFOS, the effect of biochar amendment for each compound was found to be significantly higher in amended sandy clay loam than in amended loamy sand. Application of biochar reduced the desorbed PFAS fraction of all soils. Soil type and experimental mode played a significant role in influencing desorption. Overall, the relationship between sorbent and congener was demonstrated to be highly impacted by soil type, however the unique physiochemical properties of each PFAS congener greatly influenced its unique equilibrium, sorption and desorption behaviour for each amended soil and mode tested.
Matthew Askeland; Bradley Clarke; Sardar Alam Cheema; Ana Mendez; Gabriel Gasco; Jorge Paz-Ferreiro. Biochar sorption of PFOS, PFOA, PFHxS and PFHxA in two soils with contrasting texture. Chemosphere 2020, 249, 126072 .
AMA StyleMatthew Askeland, Bradley Clarke, Sardar Alam Cheema, Ana Mendez, Gabriel Gasco, Jorge Paz-Ferreiro. Biochar sorption of PFOS, PFOA, PFHxS and PFHxA in two soils with contrasting texture. Chemosphere. 2020; 249 ():126072.
Chicago/Turabian StyleMatthew Askeland; Bradley Clarke; Sardar Alam Cheema; Ana Mendez; Gabriel Gasco; Jorge Paz-Ferreiro. 2020. "Biochar sorption of PFOS, PFOA, PFHxS and PFHxA in two soils with contrasting texture." Chemosphere 249, no. : 126072.
In this work we report the production of Bi2WO6 loaded N-biochar composites (BW/N-B) for the removal of rhodamine-B and the reduction of Cr(VI) in water. Biochar was treated with urea to produce a N-modified biochar (N-Biochar), with great conductivity and special 2D sheet platform structure. Materials with different ratios of biochar and urea were produced. These materials were used as platform for supporting Bi2WO6. The characteristics of the as-prepared composites were investigated in detail by X-ray diffraction (XRD), Transmission Electron Microscopy (TEM), X-ray Photoelectron Spectroscopy (XPS), Scanning Electron Microscopy (SEM), Fourier Transform Infrared spectra (FT-IR), UV–vis diffuse reflectance spectra (UV-DRS), Photoluminescence spectra (PL), Electrochemical Impedance Spectroscopy (EIS) and Mott-Schottky curves. After loading N-Biochar, the band gaps of the as-prepared composites were narrower than those of Bi2WO6, which could improve separation and migration of photogenerated electron-hole pairs of BW/B-N under visible-light excitation, enhancing photocatalytic activity. BW/N1-B (ratio of urea to biochar 2:1 and 1 g/L) exhibited excellent photocatalytic activity for the degradation of 10 mg/L Rhodamine B (RhB) (99.1 %, 45 min) and reduction of Cr(VI) (96.7 %, 30 min) under visible-light irradiation. The results will provide a novel theoretical foundation on the application of biochar for photocatalysis and environmental remediation.
Tianye Wang; Shuxia Liu; Wei Mao; Yichen Bai; Ken Chiang; Kalpit Shah; Jorge Paz-Ferreiro. Novel Bi2WO6 loaded N-biochar composites with enhanced photocatalytic degradation of rhodamine B and Cr(VI). Journal of Hazardous Materials 2019, 389, 121827 .
AMA StyleTianye Wang, Shuxia Liu, Wei Mao, Yichen Bai, Ken Chiang, Kalpit Shah, Jorge Paz-Ferreiro. Novel Bi2WO6 loaded N-biochar composites with enhanced photocatalytic degradation of rhodamine B and Cr(VI). Journal of Hazardous Materials. 2019; 389 ():121827.
Chicago/Turabian StyleTianye Wang; Shuxia Liu; Wei Mao; Yichen Bai; Ken Chiang; Kalpit Shah; Jorge Paz-Ferreiro. 2019. "Novel Bi2WO6 loaded N-biochar composites with enhanced photocatalytic degradation of rhodamine B and Cr(VI)." Journal of Hazardous Materials 389, no. : 121827.
Biochar has been presented as a multifunctional material with short- and long-term agro-environmental benefits, including soil organic matter stabilization, improved nutrient cycling, and increased primary productivity. However, its turnover time, when applied to soil, varies greatly depending on feedstock and pyrolysis temperature. For sewage sludge-derived biochars, which have high N contents, there is still a major uncertainty regarding the influence of pyrolysis temperatures on soil carbon mineralization and its relationship to soil N availability. Sewage sludge and sewage sludge-derived biochars produced at 300 °C (BC300), 400 °C (BC400), and 500 °C (BC500) were added to an Oxisol in a short-term incubation experiment. Carbon mineralization and nitrogen availability (N-NH4+ and N-NO3−) were studied using a first-order model. BC300 and BC400 showed higher soil C mineralization rates and N-NH4+ contents, demonstrating their potential to be used for plant nutrition. Compared to the control, the cumulative C-CO2 emissions increased by 60–64% when biochars BC300 and BC400 were applied to soil. On the other hand, C-CO2 emissions decreased by 6% after the addition of BC500, indicating the predominance of recalcitrant compounds, which results in a lower supply of soil N-NH4+ (83.4 mg kg−1) in BC500, being 67% lower than BC300 (255.7 mg kg−1). Soil N availability was strongly influenced by total N, total C, C/N ratio, H, pore volume, and specific surface area in the biochars.
Cícero Célio De Figueiredo; Thais Rodrigues Coser; Túlio Nascimento Moreira; Tairone Paiva Leão; Ailton Teixeira Do Vale; Jorge Paz-Ferreiro. Carbon Mineralization in a Soil Amended with Sewage Sludge-Derived Biochar. Applied Sciences 2019, 9, 4481 .
AMA StyleCícero Célio De Figueiredo, Thais Rodrigues Coser, Túlio Nascimento Moreira, Tairone Paiva Leão, Ailton Teixeira Do Vale, Jorge Paz-Ferreiro. Carbon Mineralization in a Soil Amended with Sewage Sludge-Derived Biochar. Applied Sciences. 2019; 9 (21):4481.
Chicago/Turabian StyleCícero Célio De Figueiredo; Thais Rodrigues Coser; Túlio Nascimento Moreira; Tairone Paiva Leão; Ailton Teixeira Do Vale; Jorge Paz-Ferreiro. 2019. "Carbon Mineralization in a Soil Amended with Sewage Sludge-Derived Biochar." Applied Sciences 9, no. 21: 4481.
Slow pyrolysis of regenerated cellulose-rich material (RCRM) and recovered lignin produced from imidazolium-based ionic liquid (IL) pre-treatment of sugarcane straw (SCS) was investigated employing a Thermogravimetric Analyser (TGA) instrument coupled with a Fourier-Transform Infrared (FTIR) spectroscopy. 1-ethyl-3-methylimidazolium acetate ([Emim][OAc]) pre-treatment of SCS altered the hydrogen bonds of cellulose and produced amorphous Cellulose II structure in RCRM. FTIR spectroscopic analysis of liquid products showed that the IL pre-treatment increased the production of furans from the pyrolysis of RCRM, because the presence of amorphous Cellulose II in RCRM enhanced the dehydration reaction during pyrolysis. Moreover, the recovered lignin from IL pre-treatment enhanced the production of phenol-rich pyrolysis oil due to the cleavage of β-O-4 ether bonds of lignin during pre-treatment. Scanning electron microscope (SEM) analysis indicated highly porous structure of both RCRM and recovered lignin derived biochars. The kinetic analysis using a hybrid approach (a combination of model-fitting and model-free methods) indicated a reduction in the activation energy for both RCRM and recovered lignin pyrolysis. It is concluded that IL pre-treatment of lignocellulosic biomass followed by low-temperature pyrolysis can be an efficient route for biorefinery production.
Pobitra Halder; Sazal Kundu; Savankumar Patel; Rajarathinam Parthasarathy; Biplob Pramanik; Jorge Paz-Ferreiro; Kalpit Shah. TGA-FTIR study on the slow pyrolysis of lignin and cellulose-rich fractions derived from imidazolium-based ionic liquid pre-treatment of sugarcane straw. Energy Conversion and Management 2019, 200, 112067 .
AMA StylePobitra Halder, Sazal Kundu, Savankumar Patel, Rajarathinam Parthasarathy, Biplob Pramanik, Jorge Paz-Ferreiro, Kalpit Shah. TGA-FTIR study on the slow pyrolysis of lignin and cellulose-rich fractions derived from imidazolium-based ionic liquid pre-treatment of sugarcane straw. Energy Conversion and Management. 2019; 200 ():112067.
Chicago/Turabian StylePobitra Halder; Sazal Kundu; Savankumar Patel; Rajarathinam Parthasarathy; Biplob Pramanik; Jorge Paz-Ferreiro; Kalpit Shah. 2019. "TGA-FTIR study on the slow pyrolysis of lignin and cellulose-rich fractions derived from imidazolium-based ionic liquid pre-treatment of sugarcane straw." Energy Conversion and Management 200, no. : 112067.
Transforming biosolids into biochar, through pyrolysis, could result in more sustainable waste management. Influence of pyrolysis conditions (temperature, heating rate and residence time) on physico-chemical properties of biosolids (collected at Mount Martha Water Recycling Plant, Melbourne), phosphorus fractions and phosphorus forms was investigated. Twelve different biochar samples were produced at 400, 500 and 600 °C, at two heating rates (5 and 20 °C/min) and at two residence times (30 and 120 min). Biochar yield, pH, electrical conductivity (EC), elements (C, H and N) and BET surface area were analysed. Sequential extraction of P in biosolids and resultant biochars was done using Hedley method. Characterization was completed with SEM images and results from 31P liquid state NMR. Increased temperatures would not only increase the alkalinity, decrease EC and increase the adsorption capacity by increasing the surface area but also convert the readily available P to a less available pool. Therefore, this nutrient might be released to soil slowly over a longer period of time. The results showed that temperature, along with residence time and heating rate, had a significant effect on the characteristics observed. Therefore, all these factors need to be carefully considered when preparing biochar for use as a soil amendment.
Sirjana Adhikari; G. Gascó; A. Méndez; A. Surapaneni; V. Jegatheesan; Kalpit Shah; J. Paz-Ferreiro. Influence of pyrolysis parameters on phosphorus fractions of biosolids derived biochar. Science of The Total Environment 2019, 695, 133846 .
AMA StyleSirjana Adhikari, G. Gascó, A. Méndez, A. Surapaneni, V. Jegatheesan, Kalpit Shah, J. Paz-Ferreiro. Influence of pyrolysis parameters on phosphorus fractions of biosolids derived biochar. Science of The Total Environment. 2019; 695 ():133846.
Chicago/Turabian StyleSirjana Adhikari; G. Gascó; A. Méndez; A. Surapaneni; V. Jegatheesan; Kalpit Shah; J. Paz-Ferreiro. 2019. "Influence of pyrolysis parameters on phosphorus fractions of biosolids derived biochar." Science of The Total Environment 695, no. : 133846.
Biochar, the product of biomass pyrolysis, has been explored as a soil amendment and carbon capture vessel. Recent literature has aligned biochar as a novel sorbent for a host of environmental contaminants. Through the variation of pyrolysis conditions, biochars can be engineered to have qualities desirable in sorbents whilst maintaining their agronomic benefits. This study focuses on identifying the effects that feedstock type and process temperature have on biochar characteristics which may in turn shed light on their potential environmental applications. Using this approach, six biochars were created from two waste biomasses. The biochars exhibited wide ranges of pH (5.6–11.1), surface area (16.2–397.4 m2/g), electrical conductivity (19–2,826 µS/cm), fixed carbon (72–97%), heavy metal and polycyclic aromatic hydrocarbons (PAHs). Statistically significant trends (P < 0.05) in biochar characteristics dependent upon increasing pyrolysis temperature and feedstock type were identified. Arsenic (>13 mg/kg), chromium (>93 mg/kg), copper (>143 mg/kg) and PAH (>6 mg/kg) concentrations presented themselves as obstacles to land application in a small number of biochars with respects to International Biochar Initiative (IBI) guidelines. However, it was demonstrated that these could be eliminated through employing pyrolysis processes which encompass higher temperatures (>500 °C) and ensuring the use of contaminant-free feedstocks. The variation in surface areas, carbonized fractions and surface functional groups achieved suggest that using the correct feedstock and process, biochar could be produced in Victoria (Australia) from common organic waste streams to the ends of acting as a sorbent, soil enhancer, and a waste management strategy.
Matthew Askeland; Bradley Clarke; Jorge Paz-Ferreiro. Comparative characterization of biochars produced at three selected pyrolysis temperatures from common woody and herbaceous waste streams. PeerJ 2019, 7, e6784 .
AMA StyleMatthew Askeland, Bradley Clarke, Jorge Paz-Ferreiro. Comparative characterization of biochars produced at three selected pyrolysis temperatures from common woody and herbaceous waste streams. PeerJ. 2019; 7 ():e6784.
Chicago/Turabian StyleMatthew Askeland; Bradley Clarke; Jorge Paz-Ferreiro. 2019. "Comparative characterization of biochars produced at three selected pyrolysis temperatures from common woody and herbaceous waste streams." PeerJ 7, no. : e6784.
Biosolids, the treated and stabilised sewage sludge, was pyrolysed in the presence of naturally occurring minerals in a Thermogravimetric Analyser (TGA). The results were then compared with a synthetic catalyst (i.e., 5% Co/Al2O3). Higher mass loss was observed in TGA in the presence of both minerals and the metal oxide based catalyst when compared to biosolids' alone pyrolysis. The scanning electron microscope (SEM) images confirmed significant morphological changes in the produced biochars while Fourier Transform Infrared (FTIR) spectra corroborated noticeable chemical changes in their structure. The kinetic analyses conducted using a hybrid approach consisting of model-fitting and model-free methods, suggested that there was a reduction in activation energy in the presence of minerals and the catalyst. Overall, it is concluded that minerals despite their low catalytic activity, offer various process and morphological advantages.
Savankumar Patel; Sazal Kundu; Pobitra Halder; Lauren Rickards; Jorge Paz-Ferreiro; Aravind Surapaneni; Srinivasan Madapusi; Kalpit Shah. Thermogravimetric Analysis of biosolids pyrolysis in the presence of mineral oxides. Renewable Energy 2019, 141, 707 -716.
AMA StyleSavankumar Patel, Sazal Kundu, Pobitra Halder, Lauren Rickards, Jorge Paz-Ferreiro, Aravind Surapaneni, Srinivasan Madapusi, Kalpit Shah. Thermogravimetric Analysis of biosolids pyrolysis in the presence of mineral oxides. Renewable Energy. 2019; 141 ():707-716.
Chicago/Turabian StyleSavankumar Patel; Sazal Kundu; Pobitra Halder; Lauren Rickards; Jorge Paz-Ferreiro; Aravind Surapaneni; Srinivasan Madapusi; Kalpit Shah. 2019. "Thermogravimetric Analysis of biosolids pyrolysis in the presence of mineral oxides." Renewable Energy 141, no. : 707-716.