This page has only limited features, please log in for full access.

Unclaimed
D. Kalderis
Department of Electronic Engineering, Hellenic Mediterranean University, 73133 Chania, Greece

Honors and Awards

The user has no records in this section


Career Timeline

The user has no records in this section.


Short Biography

The user biography is not available.
Following
Followers
Co Authors
The list of users this user is following is empty.
Following: 0 users

Feed

Review
Published: 04 August 2021 in Toxics
Reads 0
Downloads 0

Soil contamination with potentially toxic elements (PTEs) is considered one of the most severe environmental threats, while among remediation strategies, research on the application of soil amendments has received important consideration. This review highlights the effects of biochar application on soil properties and the bioavailability of potentially toxic elements describing research areas of intense current and emerging activity. Using a visual scientometric analysis, our study shows that between 2019 and 2020, research sub-fields like earthworm activities and responses, greenhouse gass emissions, and low molecular weight organic acids have gained most of the attention when biochar was investigated for soil remediation purposes. Moreover, biomasses like rice straw, sewage sludge, and sawdust were found to be the most commonly used feedstocks for biochar production. The effect of biochar on soil chemistry and different mechanisms responsible for PTEs’ immobilization with biochar, are also briefly reported. Special attention is also given to specific PTEs most commonly found at contaminated soils, including Cu, Zn, Ni, Cr, Pb, Cd, and As, and therefore are more extensively revised in this paper. This review also addresses some of the issues in developing innovative methodologies for engineered biochars, introduced alongside some suggestions which intend to form a more focused soil remediation strategy.

ACS Style

Fotis Bilias; Thomai Nikoli; Dimitrios Kalderis; Dionisios Gasparatos. Towards a Soil Remediation Strategy Using Biochar: Effects on Soil Chemical Properties and Bioavailability of Potentially Toxic Elements. Toxics 2021, 9, 184 .

AMA Style

Fotis Bilias, Thomai Nikoli, Dimitrios Kalderis, Dionisios Gasparatos. Towards a Soil Remediation Strategy Using Biochar: Effects on Soil Chemical Properties and Bioavailability of Potentially Toxic Elements. Toxics. 2021; 9 (8):184.

Chicago/Turabian Style

Fotis Bilias; Thomai Nikoli; Dimitrios Kalderis; Dionisios Gasparatos. 2021. "Towards a Soil Remediation Strategy Using Biochar: Effects on Soil Chemical Properties and Bioavailability of Potentially Toxic Elements." Toxics 9, no. 8: 184.

Journal article
Published: 03 July 2021 in Environmental Nanotechnology, Monitoring & Management
Reads 0
Downloads 0

Banana peel was used as the feedstock for the preparation of a magnetic adsorbent for the adsorption of methylene blue (MB) in aqueous solutions. The Fe-modified banana peel was characterized by surface and spectrometric methods. The Box-Behnken design (BBD) was used for determining the conditions of each experimental run and optimization of adsorption was achieved through response surface methodology. The R2, adjusted R2, and predicted R2 coefficients of the employed BBD model were determined as 0.9820, 0.9686, and 0.9182, respectively, indicating a high level of agreement between the experimental data and the proposed theoretical model. The optimum MB adsorption of 91.89% was achieved at an adsorption time of 50 min, temperature of 45°C, adsorbent dosage of 2.5 g and MB concentration of 5 mg L-1. Equilibrium was achieved in 48 min. The most influential process parameter was the adsorbent dosage, whereas the impact of time, MB concentration and temperature was considerably smaller. The Langmuir Qmax value of 28.1 mg g-1 compared favorably to respective values from other published adsorbents.

ACS Style

Fatmanur Çatlıoğlu; Sema Akay; Ersan Turunç; Belgin Gözmen; Ioannis Anastopoulos; Berkant Kayan; Dimitrios Kalderis. Preparation and application of Fe-modified banana peel in the adsorption of methylene blue: process optimization using response surface methodology. Environmental Nanotechnology, Monitoring & Management 2021, 100517 .

AMA Style

Fatmanur Çatlıoğlu, Sema Akay, Ersan Turunç, Belgin Gözmen, Ioannis Anastopoulos, Berkant Kayan, Dimitrios Kalderis. Preparation and application of Fe-modified banana peel in the adsorption of methylene blue: process optimization using response surface methodology. Environmental Nanotechnology, Monitoring & Management. 2021; ():100517.

Chicago/Turabian Style

Fatmanur Çatlıoğlu; Sema Akay; Ersan Turunç; Belgin Gözmen; Ioannis Anastopoulos; Berkant Kayan; Dimitrios Kalderis. 2021. "Preparation and application of Fe-modified banana peel in the adsorption of methylene blue: process optimization using response surface methodology." Environmental Nanotechnology, Monitoring & Management , no. : 100517.

Journal article
Published: 24 June 2021 in Bioresource Technology
Reads 0
Downloads 0

In the framework of bio-circular economy, miscanthus biomass was valorized through a single-stage, low severity hydrothermal carbonization process. The produced hydrochars were characterized using elemental and spectroscopic methodologies. It was determined that as the temperature increased so did the C content (47.9 and 68.9% for the samples prepared at 180 and 260 °C, respectively), whereas the O content decreased (from 44.2 to 25.5%, respectively). The adsorption behaviour of the hydrochars was investigated in the adsorption of Cu2+ and NH4+ and MIS-180 was determined as the optimum sample, achieving qmax values of 310 and 71 mg g−1, respectively. Isotherm and kinetic analysis indicated the higher number of O-containing functional groups of MIS-180 as the main reason for its higher adsorption capacities. Furthermore, Cu2+ adsorption followed the 2nd-order kinetic model, whereas NH4+ adsorption followed the 1st-order kinetic model, due to the different mechanisms involved, inner-sphere and outer-sphere complex formation, respectively.

ACS Style

Efthalia Georgiou; Marija Mihajlović; Jelena Petrović; Ioannis Anastopoulos; Carsten Dosche; Ioannis Pashalidis; Dimitrios Kalderis. Single-stage production of miscanthus hydrochar at low severity conditions and application as adsorbent of copper and ammonium ions. Bioresource Technology 2021, 337, 125458 .

AMA Style

Efthalia Georgiou, Marija Mihajlović, Jelena Petrović, Ioannis Anastopoulos, Carsten Dosche, Ioannis Pashalidis, Dimitrios Kalderis. Single-stage production of miscanthus hydrochar at low severity conditions and application as adsorbent of copper and ammonium ions. Bioresource Technology. 2021; 337 ():125458.

Chicago/Turabian Style

Efthalia Georgiou; Marija Mihajlović; Jelena Petrović; Ioannis Anastopoulos; Carsten Dosche; Ioannis Pashalidis; Dimitrios Kalderis. 2021. "Single-stage production of miscanthus hydrochar at low severity conditions and application as adsorbent of copper and ammonium ions." Bioresource Technology 337, no. : 125458.

Journal article
Published: 21 May 2021 in Energies
Reads 0
Downloads 0

Sewage sludge hydrochars (SSHs), which are produced by hydrothermal carbonization (HTC), offer a high calorific value to be applied as a biofuel. However, HTC is a complex processand the properties of the resulting product depend heavily on the process conditions and feedstock composition. In this work, we have applied artificial neural networks (ANNs) to contribute to the production of tailored SSHs for a specific application and with optimum properties. We collected data from the published literature covering the years 2014–2021, which was then fed into different ANN models where the input data (HTC temperature, process time, and the elemental content of hydrochars) were used to predict output parameters (higher heating value, (HHV) and solid yield (%)). The proposed ANN models were successful in accurately predicting both HHV and contents of C and H. While the model NN1 (based on C, H, O content) exhibited HHV predicting performance with R2 = 0.974, another model, NN2, was also able to predict HHV with R2 = 0.936 using only C and H as input. Moreover, the inverse model of NN3 (based on H, O content, and HHV) could predict C content with an R2 of 0.939.

ACS Style

Theodoros Kapetanakis; Ioannis Vardiambasis; Christos Nikolopoulos; Antonios Konstantaras; Trinh Trang; Duy Khuong; Toshiki Tsubota; Ramazan Keyikoglu; Alireza Khataee; Dimitrios Kalderis. Towards Engineered Hydrochars: Application of Artificial Neural Networks in the Hydrothermal Carbonization of Sewage Sludge. Energies 2021, 14, 3000 .

AMA Style

Theodoros Kapetanakis, Ioannis Vardiambasis, Christos Nikolopoulos, Antonios Konstantaras, Trinh Trang, Duy Khuong, Toshiki Tsubota, Ramazan Keyikoglu, Alireza Khataee, Dimitrios Kalderis. Towards Engineered Hydrochars: Application of Artificial Neural Networks in the Hydrothermal Carbonization of Sewage Sludge. Energies. 2021; 14 (11):3000.

Chicago/Turabian Style

Theodoros Kapetanakis; Ioannis Vardiambasis; Christos Nikolopoulos; Antonios Konstantaras; Trinh Trang; Duy Khuong; Toshiki Tsubota; Ramazan Keyikoglu; Alireza Khataee; Dimitrios Kalderis. 2021. "Towards Engineered Hydrochars: Application of Artificial Neural Networks in the Hydrothermal Carbonization of Sewage Sludge." Energies 14, no. 11: 3000.

Review article
Published: 22 April 2021 in Journal of Environmental Chemical Engineering
Reads 0
Downloads 0

This review specifically deals with the latest advances in the application of nanotechnologies and nanocomposites for remediation of arsenic (As)-contaminated water and soil. Remediation mechanisms generally include physicochemical adsorption and (photo)chemical redox reactions and filtration. Recently, various types of engineered organic/inorganic nanocomposites have been designed in membrane forms, embedded structures, or composites with extraordinary physical-chemical properties, and outstanding capacity for removal or immobilization of As in contaminated sites. In the present article, we give an overview of engineered nanomaterials developed recently (2017–2021) and their interaction mechanisms with As in contaminated water and soil. Emerging approaches include the development of bio-nanocomposites and nanomaterials that show both oxidative and adsorptive capacities. For the first time, we set out to perform a comprehensive assessment of the advantages of nanomaterials in As-contaminated soils with the focus on the mechanisms of decreasing bioavailability and leaching of As. Although great researches have been developed, serious study gaps and a new direction to future researches have been identified.

ACS Style

Leila Alidokht; Ioannis Anastopoulos; Dimitrios Ntarlagiannis; Pantelis Soupios; Bassam Tawabini; Dimitrios Kalderis; Alireza Khataee. Recent advances in the application of nanomaterials for the remediation of arsenic-contaminated water and soil. Journal of Environmental Chemical Engineering 2021, 9, 105533 .

AMA Style

Leila Alidokht, Ioannis Anastopoulos, Dimitrios Ntarlagiannis, Pantelis Soupios, Bassam Tawabini, Dimitrios Kalderis, Alireza Khataee. Recent advances in the application of nanomaterials for the remediation of arsenic-contaminated water and soil. Journal of Environmental Chemical Engineering. 2021; 9 (4):105533.

Chicago/Turabian Style

Leila Alidokht; Ioannis Anastopoulos; Dimitrios Ntarlagiannis; Pantelis Soupios; Bassam Tawabini; Dimitrios Kalderis; Alireza Khataee. 2021. "Recent advances in the application of nanomaterials for the remediation of arsenic-contaminated water and soil." Journal of Environmental Chemical Engineering 9, no. 4: 105533.

Journal article
Published: 17 March 2021 in Chemosphere
Reads 0
Downloads 0

Ibuprofen (IBP) is an emerging environmental contaminant having low aqueous solubility which negatively affects the application of advanced oxidation and adsorption processes. It was determined that as the temperature is increased to 473K, the mole fraction solubility increased considerably from 0.02×10-3 to 212.88×10-3 (10600-fold). Calculation of the thermodynamic properties indicated an endothermic process, ΔsolH > 0, with relatively high ΔsolS values. Spectroscopic, thermal and chromatographic analyses established the IBP stability at subcritical conditions. In the second part of the study, the degradation of IBP in H2O2-modified subcritical was studied and the effect of each process variable was investigated. The optimum degradation of 88% was reached at an IBP concentration of 15 mg L-1, temperature of 250oC, 105 min treatment time and 250 mM H2O2. The process was optimized by response surface methodology and a mathematical model was proposed and validated. Temperature was determined as the most influential parameter, followed by H2O2 concentration. At temperatures higher than 230oC, a small but noticeable reduction in degradation % suggested that the OH· radicals are consumed at a higher rate than they are produced, through side reactions with other radicals and/or IBP by-products. Finally, potential by-products were determined by gas chromatographic-mass spectrometric analysis and potential by-products were proposed.

ACS Style

Sema Akay; Serpil Öztürk; Dimitrios Kalderis; Berkant Kayan. Degradation, solubility and chromatographic studies of Ibuprofen under high temperature water conditions. Chemosphere 2021, 277, 130307 .

AMA Style

Sema Akay, Serpil Öztürk, Dimitrios Kalderis, Berkant Kayan. Degradation, solubility and chromatographic studies of Ibuprofen under high temperature water conditions. Chemosphere. 2021; 277 ():130307.

Chicago/Turabian Style

Sema Akay; Serpil Öztürk; Dimitrios Kalderis; Berkant Kayan. 2021. "Degradation, solubility and chromatographic studies of Ibuprofen under high temperature water conditions." Chemosphere 277, no. : 130307.

Journal article
Published: 16 December 2020 in Materials Chemistry and Physics
Reads 0
Downloads 0

The objective of this study was the development of a novel, biochar-based Pd nanocatalyst and its evaluation for the promotion of the Suzuki-Miyaura coupling reaction. The Fe3O4-Pd-biochar composite was successfully characterized through a range of spectroscopic and elemental analysis techniques. Its catalytic activity was initially assessed using p-NO2C6H4I as a model reactant and later for the production of biaryls from a wide range of aryl halides, under microwave irradiation and solvent-free conditions. The optimum yield of 99% was obtained at a catalyst dosage of 8 mg, microwave irradiation of 400 W, 6 min residence time, using K2CO3 as the base. Furthermore, the catalyst promoted the Suzuki-Miyaura reaction of aryl iodides and bromides (yields in the range of 88-97 and 86-97%, respectively), but was less successful for aryl chlorides (yields 78-83%). The presence of Fe3O4 allowed for the quick recovery of the catalyst, whereas repeated runs established its recyclability.

ACS Style

Sema Akay; Talat Baran; Berkant Kayan; Dimitrios Kalderis. Assessment of a Pd–Fe3O4-biochar nanocomposite as a heterogeneous catalyst for the solvent-free Suzuki-Miyaura reaction. Materials Chemistry and Physics 2020, 259, 124176 .

AMA Style

Sema Akay, Talat Baran, Berkant Kayan, Dimitrios Kalderis. Assessment of a Pd–Fe3O4-biochar nanocomposite as a heterogeneous catalyst for the solvent-free Suzuki-Miyaura reaction. Materials Chemistry and Physics. 2020; 259 ():124176.

Chicago/Turabian Style

Sema Akay; Talat Baran; Berkant Kayan; Dimitrios Kalderis. 2020. "Assessment of a Pd–Fe3O4-biochar nanocomposite as a heterogeneous catalyst for the solvent-free Suzuki-Miyaura reaction." Materials Chemistry and Physics 259, no. : 124176.

Journal article
Published: 05 November 2020 in Chemosphere
Reads 0
Downloads 0

Sewage sludge is abundant biomass, the sustainable management of which remains a big issue worldwide. It was demonstrated that pyrolysis of sewage sludge using simple and cost-effective apparatus can produce biochars, suitable for solid-phase extraction applications of hydrophobic analytes. Detailed characterization showed that modification lead to three more hydrophobic and one more hydrophilic sample, compared to the original biochar. All samples were evaluated in the solid-phase extraction of the emerging contaminant Bisphenol A from aqueous solutions. KOH-SSB and KOH/MeOH-SSB exhibited the most promising behavior, with the latter achieving recoveries of 88.1%, at a quantity of 0.1 g at the natural pH of the BPA solution (6.5). The effect of solution pH was insignificant in the range of 4–7, whereas the initial BPA concentration had no effect in the recovery within the range of 1–100 μg L−1. The mechanism of interaction between the optimum sample and BPA was based on hydrogen bonding and π-π interactions, establishing earlier observations that the type (and not concentration) of individual surface groups and the total surface area play a significant role in the process.

ACS Style

Ayşe Mulla Birer; Belgin Gözmen; Özgür Sönmez; Dimitrios Kalderis. Evaluation of sewage sludge biochar and modified derivatives as novel SPE adsorbents for monitoring of bisphenol A. Chemosphere 2020, 268, 128866 .

AMA Style

Ayşe Mulla Birer, Belgin Gözmen, Özgür Sönmez, Dimitrios Kalderis. Evaluation of sewage sludge biochar and modified derivatives as novel SPE adsorbents for monitoring of bisphenol A. Chemosphere. 2020; 268 ():128866.

Chicago/Turabian Style

Ayşe Mulla Birer; Belgin Gözmen; Özgür Sönmez; Dimitrios Kalderis. 2020. "Evaluation of sewage sludge biochar and modified derivatives as novel SPE adsorbents for monitoring of bisphenol A." Chemosphere 268, no. : 128866.

Review
Published: 03 September 2020 in Energies
Reads 0
Downloads 0

In this study, the growing scientific field of alternative biofuels was examined, with respect to hydrochars produced from renewable biomasses. Hydrochars are the solid products of hydrothermal carbonization (HTC) and their properties depend on the initial biomass and the temperature and duration of treatment. The basic (Scopus) and advanced (Citespace) analysis of literature showed that this is a dynamic research area, with several sub-fields of intense activity. The focus of researchers on sewage sludge and food waste as hydrochar precursors was highlighted and reviewed. It was established that hydrochars have improved behavior as fuels compared to these feedstocks. Food waste can be particularly useful in co-hydrothermal carbonization with ash-rich materials. In the case of sewage sludge, simultaneous P recovery from the HTC wastewater may add more value to the process. For both feedstocks, results from large-scale HTC are practically non-existent. Following the review, related data from the years 2014–2020 were retrieved and fitted into four different artificial neural networks (ANNs). Based on the elemental content, HTC temperature and time (as inputs), the higher heating values (HHVs) and yields (as outputs) could be successfully predicted, regardless of original biomass used for hydrochar production. ANN3 (based on C, O, H content, and HTC temperature) showed the optimum HHV predicting performance (R2 0.917, root mean square error 1.124), however, hydrochars’ HHVs could also be satisfactorily predicted by the C content alone (ANN1, R2 0.897, root mean square error 1.289).

ACS Style

Ioannis O. Vardiambasis; Theodoros N. Kapetanakis; Christos D. Nikolopoulos; Trinh Kieu Trang; Toshiki Tsubota; Ramazan Keyikoglu; Alireza Khataee; Dimitrios Kalderis. Hydrochars as Emerging Biofuels: Recent Advances and Application of Artificial Neural Networks for the Prediction of Heating Values. Energies 2020, 13, 4572 .

AMA Style

Ioannis O. Vardiambasis, Theodoros N. Kapetanakis, Christos D. Nikolopoulos, Trinh Kieu Trang, Toshiki Tsubota, Ramazan Keyikoglu, Alireza Khataee, Dimitrios Kalderis. Hydrochars as Emerging Biofuels: Recent Advances and Application of Artificial Neural Networks for the Prediction of Heating Values. Energies. 2020; 13 (17):4572.

Chicago/Turabian Style

Ioannis O. Vardiambasis; Theodoros N. Kapetanakis; Christos D. Nikolopoulos; Trinh Kieu Trang; Toshiki Tsubota; Ramazan Keyikoglu; Alireza Khataee; Dimitrios Kalderis. 2020. "Hydrochars as Emerging Biofuels: Recent Advances and Application of Artificial Neural Networks for the Prediction of Heating Values." Energies 13, no. 17: 4572.

Review
Published: 15 July 2020 in Plants
Reads 0
Downloads 0

Unexpected biomagnifications and bioaccumulation of heavy metals (HMs) in the surrounding environment has become a predicament for all living organisms together with plants. Excessive release of HMs from industrial discharge and other anthropogenic activities has threatened sustainable agricultural practices and limited the overall profitable yield of different plants species. Heavy metals at toxic levels interact with cellular molecules, leading towards the unnecessary generation of reactive oxygen species (ROS), restricting productivity and growth of the plants. The application of various osmoprotectants is a renowned approach to mitigate the harmful effects of HMs on plants. In this review, the effective role of glycine betaine (GB) in alleviation of HM stress is summarized. Glycine betaine is very important osmoregulator, and its level varies considerably among different plants. Application of GB on plants under HMs stress successfully improves growth, photosynthesis, antioxidant enzymes activities, nutrients uptake, and minimizes excessive heavy metal uptake and oxidative stress. Moreover, GB activates the adjustment of glutathione reductase (GR), ascorbic acid (AsA) and glutathione (GSH) contents in plants under HM stress. Excessive accumulation of GB through the utilization of a genetic engineering approach can successfully enhance tolerance against stress, which is considered an important feature that needs to be investigated in depth.

ACS Style

Shafaqat Ali; Zohaib Abbas; Mahmoud F. Seleiman; Muhammad Rizwan; Ilkay Yavaş; Bushra Ahmed Alhammad; Ashwag Shami; Mirza Hasanuzzaman; Dimitris Kalderis. Glycine Betaine Accumulation, Significance and Interests for Heavy Metal Tolerance in Plants. Plants 2020, 9, 896 .

AMA Style

Shafaqat Ali, Zohaib Abbas, Mahmoud F. Seleiman, Muhammad Rizwan, Ilkay Yavaş, Bushra Ahmed Alhammad, Ashwag Shami, Mirza Hasanuzzaman, Dimitris Kalderis. Glycine Betaine Accumulation, Significance and Interests for Heavy Metal Tolerance in Plants. Plants. 2020; 9 (7):896.

Chicago/Turabian Style

Shafaqat Ali; Zohaib Abbas; Mahmoud F. Seleiman; Muhammad Rizwan; Ilkay Yavaş; Bushra Ahmed Alhammad; Ashwag Shami; Mirza Hasanuzzaman; Dimitris Kalderis. 2020. "Glycine Betaine Accumulation, Significance and Interests for Heavy Metal Tolerance in Plants." Plants 9, no. 7: 896.

Review
Published: 03 March 2020 in Sustainability
Reads 0
Downloads 0

Heavy-metal (HM) pollution is considered a leading source of environmental contamination. Heavy-metal pollution in ground water poses a serious threat to human health and the aquatic ecosystem. Conventional treatment technologies to remove the pollutants from wastewater are usually costly, time-consuming, environmentally destructive, and mostly inefficient. Phytoremediation is a cost-effective green emerging technology with long-lasting applicability. The selection of plant species is the most significant aspect for successful phytoremediation. Aquatic plants hold steep efficiency for the removal of organic and inorganic pollutants. Water hyacinth (Eichhornia crassipes), water lettuce (Pistia stratiotes) and Duck weed (Lemna minor) along with some other aquatic plants are prominent metal accumulator plants for the remediation of heavy-metal polluted water. The phytoremediation potential of the aquatic plant can be further enhanced by the application of innovative approaches in phytoremediation. A summarizing review regarding the use of aquatic plants in phytoremediation is gathered in order to present the broad applicability of phytoremediation.

ACS Style

Shafaqat Ali; Zohaib Abbas; Muhammad Rizwan; Ihsan Zaheer; Ilkay Yavaş; Aydın Ünay; Mohamed Abdel-Daim; May Bin-Jumah; Mirza Hasanuzzaman; Dimitris Kalderis. Application of Floating Aquatic Plants in Phytoremediation of Heavy Metals Polluted Water: A Review. Sustainability 2020, 12, 1927 .

AMA Style

Shafaqat Ali, Zohaib Abbas, Muhammad Rizwan, Ihsan Zaheer, Ilkay Yavaş, Aydın Ünay, Mohamed Abdel-Daim, May Bin-Jumah, Mirza Hasanuzzaman, Dimitris Kalderis. Application of Floating Aquatic Plants in Phytoremediation of Heavy Metals Polluted Water: A Review. Sustainability. 2020; 12 (5):1927.

Chicago/Turabian Style

Shafaqat Ali; Zohaib Abbas; Muhammad Rizwan; Ihsan Zaheer; Ilkay Yavaş; Aydın Ünay; Mohamed Abdel-Daim; May Bin-Jumah; Mirza Hasanuzzaman; Dimitris Kalderis. 2020. "Application of Floating Aquatic Plants in Phytoremediation of Heavy Metals Polluted Water: A Review." Sustainability 12, no. 5: 1927.

Original paper
Published: 26 November 2019 in International Journal of Environmental Science and Technology
Reads 0
Downloads 0

The main aims of this work were to produce and characterize Fe-modified hydrochar from orange peel waste, optimize the adsorption through response surface methodology, investigate the role of treatment time, dye concentration, adsorbent dose and temperature, and determine the dominant mechanisms through kinetics analysis. Orange peel waste was hydrothermally carbonized at 200 °C for 8 h, and the hydrochar was embedded with magnetite nanoparticles. The composite adsorbent was characterized through spectrometric and surface analytical methods. Subsequently, analysis of variance was used to design the experimental runs, propose a polynomial equation describing the adsorption process and finally optimize the adsorption conditions. The results indicated that 99% removal can be theoretically achieved at the following conditions: dye initial concentration of 6.08 mg/L, treatment time of 26.30 min, temperature of 44.79 °C and adsorbent concentration of 2.27 g/L. The dominant factors were the dye and adsorbent concentration, whereas time and temperature variations had a much lesser impact. Among examined models, the Langmuir model showed a better match to the experimental data. The maximum monolayer adsorption capacity was determined as 10.49 mg/g. The mechanism of interaction was largely based on surface chemisorption between the dye and adsorbent. Fe-modified hydrochar exhibited a positive adsorption behavior, and it was shown that a new valorization option for orange peel waste is available. This option may follow other valorization pathways, such as isolation of biologically active molecules, therefore offering a complete solution to this type of waste.

ACS Style

F. N. Çatlıoğlu; S. Akay; B. Gözmen; E. Turunc; I. Anastopoulos; B. Kayan; D. Kalderis. Fe-modified hydrochar from orange peel as adsorbent of food colorant Brilliant Black: process optimization and kinetic studies. International Journal of Environmental Science and Technology 2019, 17, 1975 -1990.

AMA Style

F. N. Çatlıoğlu, S. Akay, B. Gözmen, E. Turunc, I. Anastopoulos, B. Kayan, D. Kalderis. Fe-modified hydrochar from orange peel as adsorbent of food colorant Brilliant Black: process optimization and kinetic studies. International Journal of Environmental Science and Technology. 2019; 17 (4):1975-1990.

Chicago/Turabian Style

F. N. Çatlıoğlu; S. Akay; B. Gözmen; E. Turunc; I. Anastopoulos; B. Kayan; D. Kalderis. 2019. "Fe-modified hydrochar from orange peel as adsorbent of food colorant Brilliant Black: process optimization and kinetic studies." International Journal of Environmental Science and Technology 17, no. 4: 1975-1990.

Journal article
Published: 26 February 2019 in Journal of Environmental Chemical Engineering
Reads 0
Downloads 0

This study investigates the degradation and mineralization of two widely used antibiotics, chloramphenicol and metronidazole, by an electro-Fenton process using graphene oxide-Fe3O4 as a heterogeneous catalyst. The graphene oxide-Fe3O4 composite was typically characterized through conventional spectroscopic and surface analytical methods. The effects of treatment time, pH, catalyst concentration and applied current were examined. In the absence of the graphene oxide-Fe3O4 catalyst (homogeneous environment), the optimum mineralization rates obtained were 57 and 71% at pH 3 and 300 min treatment time for metronidazole and chloramphenicol solutions, respectively. When the optimum graphene oxide-Fe3O4 concentration of 0.5 g L-1 was used, mineralization rates of 73 and 86% were achieved respectively, at the same conditions. This indicated the efficiency of the catalyst and proved that the heterogeneous electro-Fenton process was more effective compared to the homogenous electro-Fenton process. At the same conditions, degradation of chloramphenicol and metronidazole was >99%. The difference between the near-complete antibiotic degradation and the lower mineralization rates, can be justified by the presence of persistent by-products, such as oxalic and glyoxylic acid. Finally, the prepared catalyst showed high levels of reusability and its performance remained practically the same after 4 electro-Fenton runs.

ACS Style

Fatma Görmez; Özkan Görmez; Belgin Gözmen; Dimitrios Kalderis. Degradation of chloramphenicol and metronidazole by electro-Fenton process using graphene oxide-Fe3O4 as heterogeneous catalyst. Journal of Environmental Chemical Engineering 2019, 7, 102990 .

AMA Style

Fatma Görmez, Özkan Görmez, Belgin Gözmen, Dimitrios Kalderis. Degradation of chloramphenicol and metronidazole by electro-Fenton process using graphene oxide-Fe3O4 as heterogeneous catalyst. Journal of Environmental Chemical Engineering. 2019; 7 (2):102990.

Chicago/Turabian Style

Fatma Görmez; Özkan Görmez; Belgin Gözmen; Dimitrios Kalderis. 2019. "Degradation of chloramphenicol and metronidazole by electro-Fenton process using graphene oxide-Fe3O4 as heterogeneous catalyst." Journal of Environmental Chemical Engineering 7, no. 2: 102990.

Journal article
Published: 20 July 2018 in Ultrasonics Sonochemistry
Reads 0
Downloads 0

ZrO2-pumice and ZrO2-tuff nanocomposites were synthesized via a modified sol–gel method and used as efficient catalysts for sonocatalytic degradation of rifampin (RIF). The physico-chemical properties of the prepared catalysts were examined using XRF, SEM, EDX, FT-IR and BET analyses and compared to pure pumice and tuff samples. Subsequently, the efficacy of catalysts in degradation of RIF was assessed under various experimental conditions. Both ZrO2-pumice and ZrO2-tuff (1.5 g L−1) exhibited promising catalytic activity for sonocatalytic degradation of RIF at its initial concentration of 20 mg L−1, natural pH and under ultrasonic irradiation power of 300 W. In this condition, about 95% and 83% of RIF was removed through US/ZrO2-pumice and US/ZrO2-tuff processes, respectively. Furthermore, the influence of the addition of a number of scavengers, enhancers and gases on the degradation of RIF was studied. The pronounced degradation effectiveness of the catalysts under ultrasound irradiation could be assigned to their synergetic ability to produce reactive species and subsequent radical reactions. The intermediate products formed in the solution from degradation of RIF were also identified and a decomposition pathway was proposed using GC–MS, COD, TOC and IC analyses.

ACS Style

Alireza Khataee; Peyman Gholami; Berkant Kayan; Dimitrios Kalderis; Laleh Dinpazhoh; Sema Akay. Synthesis of ZrO2 nanoparticles on pumice and tuff for sonocatalytic degradation of rifampin. Ultrasonics Sonochemistry 2018, 48, 349 -361.

AMA Style

Alireza Khataee, Peyman Gholami, Berkant Kayan, Dimitrios Kalderis, Laleh Dinpazhoh, Sema Akay. Synthesis of ZrO2 nanoparticles on pumice and tuff for sonocatalytic degradation of rifampin. Ultrasonics Sonochemistry. 2018; 48 ():349-361.

Chicago/Turabian Style

Alireza Khataee; Peyman Gholami; Berkant Kayan; Dimitrios Kalderis; Laleh Dinpazhoh; Sema Akay. 2018. "Synthesis of ZrO2 nanoparticles on pumice and tuff for sonocatalytic degradation of rifampin." Ultrasonics Sonochemistry 48, no. : 349-361.

Original paper
Published: 08 June 2018 in Waste and Biomass Valorization
Reads 0
Downloads 0

The main objectives of this work were the following: (1) to investigate the applicability of orange peel hydrochar as a soil amendment for improving the physical properties of a compacted, clay soil and (2) to study the growth of maize on substrates composed of clay soil and hydrochar and determine any potential phytotoxic effects. The effect on soil’s bulk density (BD), aeration, water holding capacity (WHC), and hydraulic conductivity were examined with hydrochar additions of 5, 10 and 15% (w/w) and determined by conventional laboratory methods. Potential phytotoxic effects were determined through the Zucconi germination index on fresh, diluted and 4-week old undiluted hydrochar extracts. The effect of hydrochar on maize growth was studied in clay soil (as reference), clay soil with 5% (w/w) fresh hydrochar, clay soil with 5% (w/w) of 4-week-old hydrochar and clay soil with 5% (w/w) biochar (for comparison). At an application rate of 5% (w/w) hydrochar, the bulk density was reduced from 1.35 to 1.22 g/cm3, the air-filled porosity was increased from 33 to 37% and the saturated hydraulic conductivity from 0.96 to 1.01 cm/h. The water holding capacity remained practically unchanged, however it was considerably reduced at higher application rates. The seed germination test indicated strong phytotoxicity of the fresh, undiluted hydrochar extract, which was reduced when the extract was diluted or the hydrochar allowed to mature for 4 weeks. The pot tests indicated that hydrochar did not improve the yield of maize, probably due to the presence of phytotoxic substances. This study demonstrated a new valorization pathway for a significant agricultural waste. Additionally, it proved the applicability of orange peel hydrochar for improving the physical properties of clay soil. However, due to phytotoxic effects, further work is required before a field application is considered.

ACS Style

Dimitrios Kalderis; George Papameletiou; Berkant Kayan. Assessment of Orange Peel Hydrochar as a Soil Amendment: Impact on Clay Soil Physical Properties and Potential Phytotoxicity. Waste and Biomass Valorization 2018, 10, 3471 -3484.

AMA Style

Dimitrios Kalderis, George Papameletiou, Berkant Kayan. Assessment of Orange Peel Hydrochar as a Soil Amendment: Impact on Clay Soil Physical Properties and Potential Phytotoxicity. Waste and Biomass Valorization. 2018; 10 (11):3471-3484.

Chicago/Turabian Style

Dimitrios Kalderis; George Papameletiou; Berkant Kayan. 2018. "Assessment of Orange Peel Hydrochar as a Soil Amendment: Impact on Clay Soil Physical Properties and Potential Phytotoxicity." Waste and Biomass Valorization 10, no. 11: 3471-3484.

Journal article
Published: 01 March 2018 in Ultrasonics Sonochemistry
Reads 0
Downloads 0

The sonocatalytic performance of CeO2 nanoparticles synthesized by a hydrothermal method (CeO2-H) and [email protected] ([email protected]) nanocomposite, were evaluated for the degradation of Reactive Red 84 (RR84) under ultrasonic irradiation. For comparison purposes the corresponding performance of bare biochar (BC) and commercial CeO2 (CeO2-C) samples were also assessed. A complementary characterization study, involving scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), Transmission electron microscopy (TEM), dynamic light scattering (DLS), X-ray diffraction (XRD), N2 adsorption at -196°C (Brunauer-Emmett-Teller (BET) method) and Fourier transform infrared spectroscopy (FT-IR) was undertaken to gain insight into the structure-performance relationships. The effect of various parameters such as initial RR84 concentration, solution pH, catalyst amount and ultrasonic power on the sonodegradation of RR84 was studied in detail. The results indicated that the [email protected] nanocomposite exhibited the best RR84 degradation efficiency, which is enhanced with the increase of [email protected] amount and ultrasonic power but diminished with the increment in RR84 concentration and pH value. A 98.5% degradation was obtained with a [email protected] amount of 1g/L, ultrasonic power of 450 W, pH of 6.5 and initial RR84 concentration of 10mg/L. The quenching effects of various scavengers proposed that OH radical plays the key role in the process. Analyses of intermediates by Gas chromatography-Mass spectroscopy (GC-MS) identified several by-products and accordingly the main pathway was proposed.

ACS Style

Alireza Khataee; Peyman Gholami; Dimitrios Kalderis; Eleni Pachatouridou; Michalis Konsolakis. Preparation of novel CeO2-biochar nanocomposite for sonocatalytic degradation of a textile dye. Ultrasonics Sonochemistry 2018, 41, 503 -513.

AMA Style

Alireza Khataee, Peyman Gholami, Dimitrios Kalderis, Eleni Pachatouridou, Michalis Konsolakis. Preparation of novel CeO2-biochar nanocomposite for sonocatalytic degradation of a textile dye. Ultrasonics Sonochemistry. 2018; 41 ():503-513.

Chicago/Turabian Style

Alireza Khataee; Peyman Gholami; Dimitrios Kalderis; Eleni Pachatouridou; Michalis Konsolakis. 2018. "Preparation of novel CeO2-biochar nanocomposite for sonocatalytic degradation of a textile dye." Ultrasonics Sonochemistry 41, no. : 503-513.

Journal article
Published: 01 November 2017 in Ultrasonics Sonochemistry
Reads 0
Downloads 0

TiO2-biochar (TiO2-BC) nanocomposite was synthesized by sol-gel method. The characteristics of the prepared nanocomposite were examined using X-ray fluorescence, scanning electron microscopy, energy-dispersive X-ray spectroscopy, Fourier transform infrared spectroscopy and N2 adsorption-desorption analysis. The performance of synthesized TiO2-BC nanocomposite as efficient sonocatalyst was studied for the degradation of Reactive Blue 69 (RB69). Sonocatalytic degradation of RB69 in the presence of TiO2-BC nanocomposite could be explained by the mechanisms of hot spots and sonoluminescence. The optimized values for main operational parameters were determined as pH of 7, TiO2-BC dosage of 1.5g/L, RB69 initial concentration of 20mg/L and ultrasonic power of 300W. Furthermore, the effect of OH, h(+) and O2(-) scavengers on the RB69 degradation efficiency was studied. Gas chromatography-mass spectroscopy analysis was used to identify intermediate compounds formed during the RB69 degradation. The results of repeated applications of TiO2-BC in the sonocatalytic process verified its stability in long-term usage.

ACS Style

Alireza Khataee; Berkant Kayan; Peyman Gholami; Dimitris Kalderis; Sema Akay. Sonocatalytic degradation of an anthraquinone dye using TiO2-biochar nanocomposite. Ultrasonics Sonochemistry 2017, 39, 120 -128.

AMA Style

Alireza Khataee, Berkant Kayan, Peyman Gholami, Dimitris Kalderis, Sema Akay. Sonocatalytic degradation of an anthraquinone dye using TiO2-biochar nanocomposite. Ultrasonics Sonochemistry. 2017; 39 ():120-128.

Chicago/Turabian Style

Alireza Khataee; Berkant Kayan; Peyman Gholami; Dimitris Kalderis; Sema Akay. 2017. "Sonocatalytic degradation of an anthraquinone dye using TiO2-biochar nanocomposite." Ultrasonics Sonochemistry 39, no. : 120-128.

Journal article
Published: 01 November 2017 in Ultrasonics Sonochemistry
Reads 0
Downloads 0

ZrO2-biochar (ZrO2-BC) nanocomposite was prepared by a modified sonochemical/sol-gel method. The physicochemical properties of the prepared nanocomposite were evaluated using scanning electron microscopy, energy-dispersive X-ray spectroscopy, X-ray fluorescence, Fourier transform infrared spectroscopy and Brunauer-Emmett-Teller model. The sonocatalytic performance of ZrO2-BC was investigated in sonochemical degradation of Reactive Yellow 39 (RY39). The high observed sonocatalytic activity of the ZrO2-BC sample could be interpreted by the mechanisms of sonoluminescence and hot spots. Parameters including ZrO2-BC dosage, solution pH, initial RY39 concentration and ultrasonic power were selected as the main operational parameters and their influence on RY39 degradation efficiency was examined. A 96.8% degradation efficiency was achieved with a ZrO2-BC dosage of 1.5g/L, pH of 6, initial RY39 concentration of 20mg/L and ultrasonic power of 300W. In the presence of OH radical scavengers, RY39 degradation was significantly inhibited, providing evidence for the key role of hydroxyl radicals in the process. The sonodegradation intermediates were identified using gas chromatography-mass spectroscopy and the possible decomposition route was proposed.

ACS Style

Alireza Khataee; Berkant Kayan; Peyman Gholami; Dimitris Kalderis; Sema Akay; Laleh Dinpazhoh. Sonocatalytic degradation of Reactive Yellow 39 using synthesized ZrO2 nanoparticles on biochar. Ultrasonics Sonochemistry 2017, 39, 540 -549.

AMA Style

Alireza Khataee, Berkant Kayan, Peyman Gholami, Dimitris Kalderis, Sema Akay, Laleh Dinpazhoh. Sonocatalytic degradation of Reactive Yellow 39 using synthesized ZrO2 nanoparticles on biochar. Ultrasonics Sonochemistry. 2017; 39 ():540-549.

Chicago/Turabian Style

Alireza Khataee; Berkant Kayan; Peyman Gholami; Dimitris Kalderis; Sema Akay; Laleh Dinpazhoh. 2017. "Sonocatalytic degradation of Reactive Yellow 39 using synthesized ZrO2 nanoparticles on biochar." Ultrasonics Sonochemistry 39, no. : 540-549.

Conference paper
Published: 12 October 2017 in International Conference on Engineering Geophysics, Al Ain, United Arab Emirates, 9-12 October 2017
Reads 0
Downloads 0

Biochar, a commonly used soil enhancer, could be used as a remediation agent of many organic and inorganic contaminants. Some of the limitations for its widespread use involve the lack of long term monitoring and volumetric characterization tools. Geophysical methods could be used to address these limitations. With the current study we present recent research on the use of the spectral induced polarization method on biochar amended columns. The early results are very promising, showing that biochar is indeed a very efficient remediation agent, and the spectral induced polarization is sensitive on the remediation progress.

ACS Style

Dimitrios Ntarlagiannis; Dimitrios Kalderis; Pantelis Soupios; Panagiotis Kirmizakis; Konstantina Gerodimou; Sina Saneiyan; Antonios Vafidis. Biochar as a remediation agent - the role of geophysical methods for characterization and monitoring. International Conference on Engineering Geophysics, Al Ain, United Arab Emirates, 9-12 October 2017 2017, 1 .

AMA Style

Dimitrios Ntarlagiannis, Dimitrios Kalderis, Pantelis Soupios, Panagiotis Kirmizakis, Konstantina Gerodimou, Sina Saneiyan, Antonios Vafidis. Biochar as a remediation agent - the role of geophysical methods for characterization and monitoring. International Conference on Engineering Geophysics, Al Ain, United Arab Emirates, 9-12 October 2017. 2017; ():1.

Chicago/Turabian Style

Dimitrios Ntarlagiannis; Dimitrios Kalderis; Pantelis Soupios; Panagiotis Kirmizakis; Konstantina Gerodimou; Sina Saneiyan; Antonios Vafidis. 2017. "Biochar as a remediation agent - the role of geophysical methods for characterization and monitoring." International Conference on Engineering Geophysics, Al Ain, United Arab Emirates, 9-12 October 2017 , no. : 1.

Journal article
Published: 01 June 2017 in Journal of Physics and Chemistry of Solids
Reads 0
Downloads 0
ACS Style

Mirosław Kwiatkowski; Dimitris Kalderis; Evan Diamadopoulos. Numerical analysis of the influence of the impregnation ratio on the microporous structure formation of activated carbons, prepared by chemical activation of waste biomass with phosphoric(V) acid. Journal of Physics and Chemistry of Solids 2017, 105, 81 -85.

AMA Style

Mirosław Kwiatkowski, Dimitris Kalderis, Evan Diamadopoulos. Numerical analysis of the influence of the impregnation ratio on the microporous structure formation of activated carbons, prepared by chemical activation of waste biomass with phosphoric(V) acid. Journal of Physics and Chemistry of Solids. 2017; 105 ():81-85.

Chicago/Turabian Style

Mirosław Kwiatkowski; Dimitris Kalderis; Evan Diamadopoulos. 2017. "Numerical analysis of the influence of the impregnation ratio on the microporous structure formation of activated carbons, prepared by chemical activation of waste biomass with phosphoric(V) acid." Journal of Physics and Chemistry of Solids 105, no. : 81-85.