Article
Engineering, Environmental
Mohammad Feizbakhshan, Arman Peyravi, Zaher Hashisho, David Crompton, John H. Phillips, James E. Anderson, Mark Nichols
Summary: This study aims to improve the understanding of heel build-up mechanisms in the presence of oxygen during the desorption of VOCs from adsorbents. The results showed that increasing the desorption temperature in the presence of oxygen reduced the adsorbents' BET surface area and increased oxygen-induced reactions. Among the tested temperatures, the minimum heel formation was observed at 200 degrees C. Activated carbons were found to be more susceptible to oxygen-induced reactions at elevated temperatures compared to zeolite.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Jie Ding, Qiancheng Xia, Lijun Li, Guandao Gao
Summary: In this study, an efficient and economical thermal-desorption strategy was developed using a three-dimensional carbon nanotubes (CNTs) film as the model adsorbent and employing the Joule heating method. The results showed that the desorption ratio of the target pollutant reached 93.2% with a low energy consumption, providing a green and energy-efficient approach for thermal regeneration.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Biochemistry & Molecular Biology
Nicolas Perciani de Moraes, Flavio Henrique Covolam Boldrin, Tiago Moreira Bastos Campos, Gilmar Patrocinio Thim, Lianqing Yu, Marcos Roberto de Vasconcelos Lanza, Liana Alvares Rodrigues
Summary: This study proposes new black-wattle tannin/kraft lignin H3PO4-activated carbon xerogels as sustainable and efficient adsorbents. The carbon xerogels exhibit a high specific surface area and pore volume, which is attributed to the inclusion of kraft lignin. The best adsorbent (XLT 50%) shows a high adsorption capacity for methylene blue and demonstrates good reusability and versatility for adsorption processes.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Thermodynamics
Gautam, Satyabrata Sahoo
Summary: The current research focuses on characterizing and comparing the physiochemical properties of seven commercially available activated carbons (ACs) as adsorbents for CO2 capture. The study found that the selected ACs have high micro and ultra-micro porosity, making them suitable for post-combustion CO2 capture. The study also estimated important thermodynamic properties of adsorption and confirmed that the selected ACs are suitable for various gas sorption applications.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2022)
Article
Thermodynamics
Gautam, Satyabrata Sahoo
Summary: The research focuses on characterizing and comparing seven commercially available activated carbons as adsorbents for CO2 capture, revealing their suitability for various gas sorption applications and providing valuable properties for actual system design.
THERMAL SCIENCE AND ENGINEERING PROGRESS
(2022)
Article
Chemistry, Physical
Aleksandra Bazan-Wozniak, Agnieszka Nosal-Wiercinska, Selehattin Yilmaz, Robert Pietrzak
Summary: This article presents the potential of two activated carbons obtained through the chemical activation of low-rank coals for the adsorption of Rhodamine B dye. The results showed that the adsorbents exhibit a mesoporous texture and their acidic-basic character depends on the starting material. The adsorption process followed a chemical process and exhibited monolayer adsorption according to the kinetic and isotherm studies. The activated carbons exhibited a high maximum adsorption capacity, and hydrochloric acid was found to be the most effective eluent for desorption.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Materials Science, Multidisciplinary
Tran P. T. Quach, Linh Doan
Summary: Synthetic dye contamination of wastewater is a significant issue, and adsorption is a widely studied method for wastewater treatment. Superparamagnetic iron oxide nanoparticles (SPIONs) with a size of 13.6 +/- 1.9 nm were synthesized using the co-precipitation method. By modifying the surface of SPIONs with polyvinyl alcohol, chitosan, and graphene oxide, the entrapment efficiency of methylene blue (MB) reached 87.00 +/- 0.16% after 13 days at pH 7, with the highest MB loading capacity and loading amount being 3.638 +/- 0.009% and 36.385 +/- 0.095 mg/g, respectively. The cumulative desorption capacity of the adsorbent was highest at 8.94 +/- 0.66% after 30 days at pH 3.8. However, further research is needed to determine the optimal ratio, temperature, and pH levels for this compound.
Article
Green & Sustainable Science & Technology
Jiashi Li, Xiaoqiang Dong, Xiaofeng Liu, Xin Xu, Wei Duan, Junboum Park, Lei Gao, Yisi Lu
Summary: This study comparatively investigated the adsorption capacities of peanut shells, sawdust, and commercial activated carbon for heavy metal ions from water. The results showed that different adsorption parameters and properties of adsorbents influenced the removal rates of heavy metal ions. The adsorption processes followed Langmuir or Freundlich isotherm models and were spontaneous heat absorption reactions. Peanut shells can be used as a green adsorbent to replace activated carbon for heavy metal ion adsorption.
Article
Environmental Sciences
Ana Jocic, Stefan Breitenbach, Igor A. Pasti, Christoph Unterweger, Christian Furst, Tamara Lazarevic-Pasti
Summary: This study investigated the adsorption properties of viscose fiber-derived activated carbon fibers (ACFs) for organophosphorus pesticides (OPs). The results showed that ACFs had the highest adsorption efficiency for chlorpyrifos, followed by malathion and dimethoate. The material properties were correlated with the uptake of OPs. The ACFs demonstrated great potential for practical application, reducing OPs concentrations to levels that have no acute neurotoxic effects.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Engineering, Environmental
Shanshan Chen, Yiyue Guo, Jianan Zhang, Yingchun Guo, Xiaoyi Liang
Summary: CuFe2O4-based adsorbents with different active phase loadings were synthesized and used for H2S removal from humidified air at room temperature. The activated carbon with 20 wt% CuFe2O4 showed the best H2S adsorption performance and maintained good adsorption capacity after thermal regeneration. This study provides novel insights for the synthesis of metal oxide-based adsorbents and their application in nanoscale reactive adsorption.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Agricultural Engineering
Zhijie Xie, Qin Cao, Yichao Chen, Yiping Luo, Xiaofeng Liu, Dong Li
Summary: The addition of powdered activated carbon (PAC) had different effects on the anaerobic digestion of cornstalk under mesophilic and thermophilic conditions. The differences in performance were mainly attributed to the distinct mechanisms of action of PAC on the microbial community composition and methane production.
BIORESOURCE TECHNOLOGY
(2022)
Review
Environmental Sciences
Despina A. Gkika, Athanasios C. Mitropoulos, George Z. Kyzas
Summary: Despite the inconsistent data representation in various published reviews, this review emphasizes the importance of desorption and regeneration compared to the adsorption stage. Different adsorbents, such as graphene, carbon nanotubes, activated carbon compounds, clays, and polymer adsorbents, are categorized and studied for their desorption and regeneration abilities. The pH, dose, concentration, adsorption ability, and cost of the adsorbents are examined for further analysis. The study also evaluates the recovery efficiency and reuse potential of the adsorbents through the desorption process. The highest adsorption capacity is observed in graphene-based and activated carbon materials, while carbon nanotubes and polymer-based adsorbents show lower and varying adsorption capacities.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Materials Science, Multidisciplinary
Lingkai Zhu, Man Xi, Yuyuan Yao, Ping Lan
Summary: In this study, thiol functionalized activated carbon fibers (ACF-SH) were used to improve the adsorption performances of heavy metals, particularly Pb2+. The modified activated carbon fibers showed a high binding affinity towards Pb2+ due to the high density of sulfur-containing and nitrogen-containing groups. The findings suggest that ACF-SH has great potential as an adsorbent for removing Pb2+ ions from effluent.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Engineering, Multidisciplinary
Kai Fang, Rendang Yang
Summary: Oxidation treatment enhances the pore volume and surface area of activated carbon, leading to increased adsorption capacity for furfural.
ALEXANDRIA ENGINEERING JOURNAL
(2021)
Article
Engineering, Environmental
Avni Jain, Sonu Kumari, Swati Agarwal, Suphiya Khan
Summary: Nanotechnology has greatly contributed to the treatment of contaminated water through the development of nano-adsorbents, and the demand for such adsorbents in the water industry has increased rapidly. Different techniques for the regeneration of adsorbents have been developed, and factors such as pH, temperature, and time should be considered for efficient regeneration. Regeneration can enhance the application cycles and contribute to ecological balance and environmental safety.
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
(2021)
Article
Engineering, Chemical
Giovanna O. Moreira, Guilherme L. Dotto, Marcos F. P. Moreira
Summary: Thermal diffusivity, an important parameter in heat transfer studies, was determined using a new algorithm based on Talbot's method. The algorithm utilized a one-dimensional Fourier heat conduction equation and a free and open-source program was developed for the calculations. Experimental data showed that the results were strongly influenced by the values of n and omega.
CHEMICAL ENGINEERING COMMUNICATIONS
(2023)
Article
Polymer Science
Bruna de Oliveira Molon, Bianca de Oliveira Molon, Janaina Oliveira Goncalves, Eduardo Silveira Ribeiro, Patricia Silva Diaz
Summary: The aim of this study was to develop a hydrogel with reduced swelling degree. By deacetylating and using Xanthomonas arboricola pv pruni 106 as the base material, a hydrogel was produced using glutaraldehyde as a crosslinker. The hydrogel showed lower swelling degree and higher apparent viscosity compared to xanthan gum in its natural form. Overall, the xanthan gum-based hydrogel remained stable during storage.
JOURNAL OF APPLIED POLYMER SCIENCE
(2023)
Article
Chemistry, Physical
Henrique Gasparetto, Eder Claudio Lima, Fernando Machado Machado, Guilherme Luiz Dotto, Nina Paula Goncalves Salau
Summary: The removal of reactive red M-2BE dye from aqueous solution using multi-walled carbon nanotubes and powdered activated carbon was studied. Machine learning algorithms were used to model the kinetic adsorption, and the SHapley Additive exPlanations (SHAP) were employed to interpret the effect of each feature on the adsorption capacity. The results showed that the ANFIS model had the best statistical metrics, and temperature had the least contribution in describing the adsorption capacity. This novel application provides important insights for adsorption research.
ADSORPTION-JOURNAL OF THE INTERNATIONAL ADSORPTION SOCIETY
(2023)
Article
Engineering, Environmental
Lotfi Sellaoui, Guilherme L. Dotto, Yasmin Vieira, Glaydson S. dos Reis, Marcos L. S. Oliveira, Luis F. O. Silva, Mohammad Rizwan Khan, Salim Manoharadas, Marcelo Godinho, Lucas A. Fantinel, Cesar Aguzzoli, Ronald K. S. Santos
Summary: In this study, the adsorptive properties of pesticides on pinus-based biochar were examined using conventional and statistical physics approaches. The results showed that pinus-based biochar is a highly adsorbent material capable of efficiently removing pesticides from water sources.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Green & Sustainable Science & Technology
Larah Gondim Santos Paulino, Luisa Bataglin Avila, Caroline Costa Moraes, Mohammad Rizwan Khan, Salim Manoharadas, Glaydson Simoes dos Reis, Guilherme Luiz Dotto, Gabriela Silveira da Rosa
Summary: This study aims to enhance bilayer membranes by incorporating phytochemical compounds and natural extracts, resulting in improved mechanical and barrier properties. The addition of olive leaf extracts shows significant potential for utilization as wound dressings.
Article
Environmental Sciences
Matias S. Netto, Diana Pinto, Dison S. P. Franco, Jordana Georgin, Evandro S. Mallmann, Anelise H. P. de Oliveira, Luis F. O. Silva, Guilherme L. Dotto
Summary: This study analyzed the adsorption of ivermectin with commercial activated charcoal and found that the adsorption capacity is highly sensitive to changes in pH, with the best adsorption performance observed at conditions close to neutrality. The commercial activated charcoal showed high efficiency and fast kinetics in removing ivermectin, and performed well in continuous operation mode.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Victoria X. Nascimento, Diana Pinto, Sabrina F. Lutke, Maria C. F. da Silva, Fernando. M. Machado, Eder. C. Lima, Luis F. O. Silva, Guilherme L. Dotto
Summary: Sapelli wood sawdust-derived magnetic activated carbon (SWSMAC) was produced through single-step pyrolysis using KOH and NiCl2 as activating and magnetization agents. The obtained SWSMAC was a mesoporous material with good textural properties and exhibited ferromagnetic properties. It effectively adsorbed brilliant blue FCF dye through various interactions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Maria C. F. da Silva, Sabrina F. F. Lutke, Victoria X. Nascimento, Eder. C. Lima, Luis F. O. Silva, Marcos L. S. Oliveira, Guilherme L. Dotto
Summary: The Brazil nut shell was used as a precursor material for producing activated carbon, which showed excellent adsorption properties for phenol. The activated carbon had a specific surface area of 332 m(2) g(-1) and demonstrated effective phenol removal at an adsorbent dosage of 0.75 g L-1 and pH 6.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Materials Science, Multidisciplinary
Ravi Moreno Araujo Pinheiro Lima, Glaydson Simoes dos Reis, Ulla Lassi, Eder Claudio Lima, Guilherme Luiz Dotto, Helinando Pequeno de Oliveira
Summary: In this study, activated biochar was prepared as the active electrode material for supercapacitors, and its capacitive performance was improved by doping with polypyrrole (PPy). Physicochemical characterization data showed that PPy doping affected the morphology, specific surface area, pore structure, and surface functionalities of the biochar. The biochar-PPy composite exhibited a lower surface area compared to pristine biochar.
C-JOURNAL OF CARBON RESEARCH
(2023)
Article
Environmental Sciences
Angelica F. M. Streit, Patricia Grassi, Fernanda C. Drumm, Luis F. O. Silva, Marcos L. S. Oliveira, Gabriela C. Collazzo, Marcelo Godinho, Daniele Perondi, Guilherme L. Dotto
Summary: In this study, carbonaceous materials were synthesized from floated sludge obtained from a poultry industry wastewater treatment plant. The materials were characterized and studied for methylene blue dye adsorption. The adsorption experiments evaluated the impacts of initial pH solution, adsorbent dosage, kinetics, equilibrium, and thermodynamics. The results showed that the addition of ZnCl2 + lime, followed by pyrolysis and acid leaching, significantly improved the properties of the materials, resulting in increased porosity and surface area. Optimal conditions for MB removal were found to be a natural pH of the solution (8.0) and an AC-II dosage of 0.75 g L-1. Elovich and Sips' models were found to best fit the experimental kinetic and equilibrium data, respectively. The adsorption process was determined to be spontaneous and endothermic based on thermodynamic parameters. The simulated effluent achieved a discoloration efficiency of 67.8%.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Chemistry, Physical
Inez A. Barbieri, Marcos L. S. Oliveira, Franciele S. Bruckmann, Theodoro R. Salles, Leonardo Zancanaro, Luis F. O. Silva, Guilherme L. Dotto, Eder C. Lima, Mu. Naushad, Cristiano R. Bohn Rhoden
Summary: This study evaluated the adsorption of zolpidem on magnetic graphene oxide and synthesized magnetic graphene oxide adsorbents for zolpidem removal. The best magnetic nanoadsorbent was found to have a removal percentage of 87.07% at specific pH and temperature conditions. The results suggest that the removal of zolpidem is related to the surface chemistry of the adsorbent rather than the surface area of graphene oxide. The adsorbent showed excellent adsorption efficiency and magnetic behavior, making it a promising material for removing zolpidem from aqueous solutions.
JOURNAL OF MOLECULAR LIQUIDS
(2024)
Article
Environmental Sciences
Juliana Machado Nascimento dos Santos, Fabiola Balzan Dalla Nora, Katia da Boit Martinello, Melissa Gurgel Adeodato Vieira, Asad Nawaz, Luis Felipe Oliveira Silva, Salim Manoharadas, Guilherme Luiz Dotto
Summary: Grain cultivation and its impacts on the environment, specifically the generation of solid waste and the use of agrochemicals, have attracted much attention. This study proposes a novel approach to achieve self-sustainability in rice farming by reusing green silica waste as an adsorbent for treating pesticide-contaminated effluents. The carbonaceous material obtained from burning rice husks and subsequent treatment exhibited promising adsorption properties towards 2,4-dichlorophenoxyacetic acid (2,4-D) pesticide. The findings suggest that this material has the potential to contribute to the sustainable development of rice farming.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Caroline Maria Sebem da Silva, Marcos Leandro Silva Oliveira, Christian Manera, Marcelo Godinho, Daniele Perondi, Naushad Ahmad, Asad Nawaz, Luis Felipe Oliveira Silva, Guilherme Luiz Dotto
Summary: Graphene-based materials have gained increasing attention due to their various applications, but there are challenges in their production process. This study successfully synthesized graphene-like porous carbon nanosheets and compared them with carbon chars. The experiments showed that GPCN materials had high specific surface area and total pore volume, and exhibited good adsorption capacity for CO2(g).
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Sundararajan Ashok Kumar, Daniel Rani Rosaline, Edson Luiz Foletto, Guilherme Luiz Dotto, Savariroyan Stephen Rajkumar Inbanathan, Gopalan Muralidharan
Summary: In this study, cadmium oxide nanofibers and graphene-doped cadmium oxide nanocomposites were synthesized using green tea extract. These materials showed excellent photocatalytic properties for methylene blue removal and high capacitance as electrode materials for supercapacitors.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Patricia Grassi, Angelica Fatima Mantelli Streit, Luana Rabelo Hollanda, Guilherme Luiz Dotto, Edson Luiz Foletto
Summary: In this study, a novel iron-based catalyst support was prepared and successfully applied in the photo-Fenton degradation of Ponceau 4R. The textural properties of the composite were improved after impregnation with Fe2O3. The composite showed excellent catalytic activity, achieving efficient degradation of Ponceau 4R with acceptable performance after multiple cycles. Therefore, this material has potential applications as a catalyst for the treatment of dyed molecules in wastewater.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
