Article
Engineering, Environmental
Lionel Domergue, Nicolas Cimetiere, Sylvain Giraudet, Pierre Le Cloirec
Summary: The presence of pesticides in drinking water is a major concern. This study investigated the adsorption of pesticide metabolites onto granular activated carbon and found that the adsorption performance was influenced by the adsorption kinetics.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Environmental Sciences
Xi-Xi Wang, Bao-Ming Liu, Min-Feng Lu, Yu-Ping Li, Ying-Ying Jiang, Ming-Xing Zhao, Zhen-Xing Huang, Yang Pan, Heng-Feng Miao, Wen-Quan Ruan
Summary: This study analyzed the physicochemical properties, components, and disinfection byproduct formation potentials (DBPFPs) of algal organic matter (AOM) and natural organic matter (NOM) in a typical eutrophic lake. Results showed that AOM had higher organic nitrogen content and exhibited higher DBPFPs, especially for nitrogenous DBPFP. The study also found that the molecular weight distribution between AOM and NOM was similar, but AOM had higher concentrations of building blocks while NOM had higher concentrations of biopolymers and humics (HS).
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2021)
Article
Engineering, Environmental
Luan de Souza Leite, Maria Teresa Hoffmann, Fabio Simoes de Vicente, Danilo Vitorino dos Santos, Luiz Antonio Daniel
Summary: The traditional bituminous activated carbon showed the best performance for AOM removal, followed by babassu coconut activated carbon. Additionally, significant reductions in trihalomethanes formation potential were achieved.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Green & Sustainable Science & Technology
Hailan Yang, Shujing Ye, Jiajia Wang, Han Wang, Ziwei Wang, Qiang Chen, Wenjun Wang, Ling Xiang, Guangming Zeng, Xiaofei Tan
Summary: Carbon materials are widely used in water treatment progress, showing good adsorption and catalytic performance in removing organic matter and its derived disinfection by-products at different stages.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Sergio Acevedo, Liliana Giraldo, Juan C. Moreno-Pirajan
Summary: This study examines the adsorption kinetics of activated carbon (AC) adsorbent materials produced from a by-product of African palm processing. The textural characteristics of the adsorbent solids were determined through N-2 physisorption, revealing BET areas between 721 and 1334 m(2)g(-1) and micropore volumes between 0.33 and 0.55 cm(3)g(-1). FTIR was used for chemical characterization, and CO2 adsorption was measured, showing values between 175 and 274 mg·g(-1). The kinetic study suggests that the intraparticle diffusion model best describes the physisorption process.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Outi Kaarela, Markus Koppanen, Tero Kesti, Riitta Kettunen, Marja Palmroth, Jukka Rintala
Summary: The study investigated the removal of different natural organic matter components from boreal lake water in a full-scale drinking water treatment plant using granular activated carbon filters containing different commercial carbons. Results showed that coagulation-flocculation, flotation, and chlorine dioxide oxidation were effective in reducing organic matter content, while sand and GAC filtration were efficient in removing BDOC. It was concluded that complementary analyses such as LC-OCD, FEEM, and BDOC are beneficial for optimizing NOM removal in DWTPs, and comparing different GACs in full-scale studies is important due to variations in TOC removal efficiencies.
JOURNAL OF WATER PROCESS ENGINEERING
(2021)
Article
Environmental Sciences
Ying Yu, Xin Huang, Ruya Chen, Linlin Pan, Baoyou Shi
Summary: The study found that haloacetic acids and haloacetonitriles are two representative disinfection byproducts, with better removal efficiencies in advanced treatment trains compared to conventional treatment trains. Under pre-chlorination condition, the consumption of activated carbon in old granular activated carbon filters was higher than in new ones, resulting in increased levels of HAAs and HANs in the effluent.
Article
Engineering, Environmental
Xian-Shi Wang, Yu-Lei Liu, Li-Xu Xue, Heng Song, Xiang-Rui Pan, Zhe Huang, Shu-Yue Xu, Jun Ma, Lu Wang
Summary: Up to 15 disinfection byproducts (DBPs) were found in anthracite-filtered water, while DBPs were undetectable in water filtered with other materials. New anthracite-filtered water contained lower levels of dissolved organic carbon, dissolved organic nitrogen, and ammonia nitrogen compared to aged anthracite-filtered water. Organic carbon was released into the filtered water, with a small percentage being toxic and carcinogenic aromatic carbons.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Multidisciplinary
A. R. Solaimany Nazar, M. B. Kurade, M. Ali Khan, B-H Jeon
Summary: This study examined the adsorption of methylparaben (MP) on Calgon carbon (F400) and Norit-type Granular Activated Carbons (GACs) under different conditions. The influence of Humic Acid (HA) on MP adsorption was evaluated. The results showed that the Freundlich model well described the adsorption isotherms. The maximum adsorption capacities for MP on F400 and Norit GACs were 150 mg/g and 100 mg/g, respectively. Additionally, HA increased the adsorption capacity of MP on F400 GAC.
Article
Environmental Sciences
Lina Ramirez Arenas, Philippe Le Coustumer, Stephan Ramseier Gentile, Stephane Zimmermann, Serge Stoll
Summary: The presence of nanoparticles in drinking water raises concerns about their potential risks to human health and the efficacy of water treatment plants in removing them. This study examines the efficiency of granular activated carbon (GAC) in removing CeO2 nanoparticles. The results show that GAC has a good affinity for nanoparticles, with higher adsorption capacity and removal efficiency in lake water compared to ultrapure water. The adsorption mechanism is mainly controlled by electrostatic attractions, and mass transfer processes play a role in the removal of nanoparticles in lake water.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Biochemistry & Molecular Biology
Martyna Jurkiewicz, Robert Pelech
Summary: This study investigated the adsorption process of o-DCB onto ACs and modified CNTs from the aqueous phase. It was found that carbon adsorbents are effective in removing o-DCB, with ACs showing higher regenerative abilities compared to CNTs. The modifications of CNTs improved their adsorption properties for o-DCB, but impacted the effectiveness of the regeneration process.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Engineering, Environmental
Yanan Chen, Jawad Ali, Lotfi Sellaoui, Fatma Dhaoudi, Dison S. P. Franco, Jordana Georgin, Alessandro Erto, Julien Vieillard, Michael Badawi
Summary: The activated carbons derived from Calophyllum inophyllum and Manihot esculenta were used for the removal of Diuron herbicide and exhibited different performances. The adsorbent from Manihot esculenta showed better results with a maximum adsorption capacity of 220 mg/g. The analysis of the adsorption mechanism using a physical model revealed that an endothermic aggregation process occurs, and the adsorption is based on physical forces.
JOURNAL OF WATER PROCESS ENGINEERING
(2023)
Article
Engineering, Chemical
Qi Wang, Frederik Zietzschmann, Roberta Hofman-Caris, Nan Jiang, Jonas Schuster, Zheng Wang, Jianwei Yu, Min Yang, Luuk C. Rietveld
Summary: It was found that dissolved organic matter (DOM) in natural water has ubiquitous competitiveness against organic micropollutants (OMPs) during adsorption onto activated carbon. However, not all adsorbable DOM fractions are competitive. The poorly adsorbable DOM was shown to be a non-competitive co-adsorbate and can even enhance the adsorption capacity of certain OMPs. The amount of DOM competitors increased for weaker adsorbable OMPs and at higher initial OMP concentrations.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Yuyin Tang, Cheng-Shiuan Lee, Harold Walker, Christopher Gobler, Onur Apul, Arjun K. Venkatesan, Xinwei Mao
Summary: This study investigated the impact of residual H2O2 on the removal of AOP byproducts by two types of GAC, revealing that the presence of byproducts significantly inhibited the decomposition of H2O2 on Centaur. In multi-component systems, both GACs showed decreased byproduct removal kinetics and capacity due to competition.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Chemistry, Physical
Jeamichel Puente Torres, Harold Crespo Sariol, Thayset Marino Peacok, Jan Yperman, Peter Adriaensens, Robert Carleer, Angel Brito Sauvanell
Summary: The X-ray absorption (XRA) method, combined with digital image processing techniques, is a reliable way to determine the exhaustion degree of granular activated carbons (GACs) and identify different adsorbed ions and molecules on GAC. By simulating adsorption isotherm data and analyzing distinctive XRA configurations, relationships between incident energy and atomic number, adsorbate mass, and molar or atomic mass of adsorbed molecules or ions were established.
Article
Chemistry, Physical
Adrian Quindimil, M. Carmen Bacariza, Jose A. Gonzalez-Marcos, Carlos Henriques, Juan R. Gonzalez-Velasco
Summary: This study improved the performance of Ni/Al2O3 catalyst for low temperature CO2 methanation by using glycerol-assisted impregnation and co-impregnation of Ru. The Ru dispersion in RuAlGAI catalyst was higher, and NiAlGAI catalyst showed slightly higher metal surface and better catalytic performance. Additionally, co-impregnating Ru significantly increased Ni surface area and led to a higher methane yield.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Guillermo Penche, Juan R. Gonzalez-Velasco, M. Pilar Gonzalez-Marcos
Summary: In this work, six porous hexacyanometallate complexes were successfully synthesized and characterized. The thermal stability, pore size, crystallite size, and catalytic properties of these compounds are strongly influenced by the choice of transition metal and cyanometallate anion. These compounds showed moderate activity in the copolymerization of propylene oxide and CO2.
Article
Energy & Fuels
Irene Sierra, Unai Iriarte-Velasco, Jose L. Ayastuy, Andres T. Aguayo
Summary: Sewage sludge-based porous materials were prepared using an integrated and energy-saving procedure, which showed promising potential for wastewater treatment.
BIOMASS CONVERSION AND BIOREFINERY
(2022)
Article
Chemistry, Applied
Guillermo Penche, M. Pilar Gonzalez-Marcos, Juan R. Gonzalez-Velasco
Summary: This study reports the catalytic activity of four transition metal hexacyanoferrate(II) complexes in the ring-opening copolymerization of CO2 and propylene oxide for the first time. The complexes showed mild activity and produced polyethercarbonates with moderate CO2 content and random configuration. Among them, the Co-2[Fe(CN)(6)] complex exhibited high potential as a catalyst for CO2/PO ROCOP.
TOPICS IN CATALYSIS
(2022)
Article
Chemistry, Multidisciplinary
Adrian Quindimil, Jon A. Onrubia-Calvo, Arantxa Davo-Quinonero, Alejandro Bermejo-Lopez, Esther Bailon-Garcia, Benat Pereda-Ayo, Dolores Lozano-Castello, Jose A. Gonzalez-Marcos, Agustin Bueno-Lopez, Juan R. Gonzalez-Velasco
Summary: The mechanism and kinetic of CO2 methanation reaction of 9.5% Ni/Al2O3 catalyst is analyzed, and a kinetic model capable to accurately predict the reaction rate is developed. The proposed H-assisted CO formation route improves the accuracy of the model.
JOURNAL OF CO2 UTILIZATION
(2022)
Article
Energy & Fuels
Jon A. Onrubia-Calvo, Alejandro Bermejo-Lopez, Sonia Perez-Vazquez, Benat Pereda-Ayo, Jose A. Gonzalez-Marcos, Juan R. Gonzalez-Velasco
Summary: This study investigates the viability of LaNiO3-derived formulations as precursors of dual function materials (DFMs) for CO2 capture and in-situ conversion to CH4, and demonstrates the potential application of 30% LaNiO3/CeO2 formulation in achieving efficient methane production.
Article
Engineering, Chemical
Jon A. Onrubia-Calvo, Adrian Quindimil, Arantxa Davo-Quinonero, Alejandro Bermejo-Lopez, Esther Bailon-Garcia, Benat Pereda-Ayo, Dolores Lozano-Castello, Jose A. Gonzalez-Marcos, Agustin Bueno-Lopez, Juan R. Gonzalez-Velasco
Summary: The reaction kinetics of CO2 methanation over a highly active 8.5% Ni/CeO2 catalyst was studied, and the formate route was found to accurately predict the experimental data.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2022)
Article
Chemistry, Physical
Adriana Morales-Marin, Unai Iriarte-Velasco, Miguel Angel Gutierrez-Ortiz, Jose Luis Ayastuy
Summary: Catalysts synthesized by nanocasting showed different performances in aqueous-phase reforming of glycerol, with NiAl-NCN catalyst exhibiting higher activity but more methane formation.
Article
Chemistry, Applied
A. J. Reynoso, J. L. Ayastuy, U. Iriarte-Velasco, M. A. Gutierrez-Ortiz
Summary: Waste glycerol from biodiesel production was treated to make it suitable for continuous Aqueous-Phase Reforming (APR) in a tubular reactor. The impact of impurities, such as acetic acid, on the catalyst stability was investigated. The work established the basis for the regeneration of the spent catalyst and has significant implications for the development of APR technology for crude glycerol.
FUEL PROCESSING TECHNOLOGY
(2023)
Article
Chemistry, Analytical
Irene Sierra, Jose L. Ayastuy, Miguel A. Gutierrez-Ortiz, Unai Iriarte-Velasco
Summary: Porous materials based on bioapatite were prepared through the thermochemical activation of pork bone char, using different reagents (H2SO4 and K2CO3), heating atmosphere (inert and oxidizing) and activation temperature. The best textural properties are obtained in an oxidizing atmosphere at 350 oC. The oxidizing atmosphere is involved in the generation of OH- functional groups. These results demonstrate the feasibility of configuring activation protocols to tailor the physicochemical properties of biapatite-based materials, for use in specific fields.
JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS
(2023)
Article
Chemistry, Physical
Guillermo Penche, Maria P. Gonzalez-Marcos, Juan R. Gonzalez-Velasco, Cyler W. Vos, Christopher M. Kozak
Summary: In this study, four novel 2D layered tetracyanonickelate complexes were prepared and tested as catalysts for CO2 and propylene oxide copolymerization. These complexes yielded random polyethercarbonates with medium-to-low CO2 content, moderate molecular weight, and broad dispersity. The Co-Ni DMC catalyst showed promising potential as an alternative to the classic Zn-Co DMC compound with 100% conversion of propylene oxide after 24 hours. The catalytic performance and kinetics of these compounds were compared and assessed.
CATALYSIS SCIENCE & TECHNOLOGY
(2023)
Article
Engineering, Environmental
A. J. Reynoso, J. L. Ayastuy, U. Iriarte-Velasco, M. A. Gutierrez-Ortiz
Summary: This study investigated the influence of process variables on the catalytic performance in the glycerol hydrogenation reaction, finding that higher reaction temperature/pressure, lower space velocity, and more diluted feedstocks favored H2 production. Additionally, a threshold value for the ratio of dehydrogenation to dehydration liquid products was identified at 10% glycerol concentration. Characterization of the post-reaction catalyst revealed that Co leaching was the major drawback.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Engineering, Environmental
A. J. Reynoso, U. Iriarte-Velasco, M. A. Gutierrez-Ortiz, J. L. Ayastuy
Summary: In this study, Ce-doped CoAl2O4 catalysts were synthesized by coprecipitation for the hydrodeoxygenation of glycerol with in-situ produced H-2 via aqueous-phase reforming. The results showed that Ce doping increased the selectivity and yield, as well as the population and strength of acid centers.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Jon A. Onrubia-Calvo, Benat Pereda-Ayo, Jose A. Gonzalez-Marcos, Agustin Bueno-Lopez, Juan R. Gonzalez-Velasco
Summary: The study investigates the viability of LaNiO3/CeO2 formulations as precursors for CO2 methanation, with the 10% LaNiO3/CeO2 precursor demonstrating high activity, selectivity, and stability. The interaction between Ni, La2O3 and CeO2 enhances the efficiency of CO2 methanation and the stability of the catalyst.
CATALYSIS SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
Alejandro Bermejo-Lopez, Benat Pereda-Ayo, Jose A. Gonzalez-Marcos, Juan R. Gonzalez-Velasco
Summary: The study explores the use of dual function materials for alternating cycles of CO2 adsorption and in situ hydrogenation to CH4, eliminating the need for an intermediate CO2 purification step. The addition of promoters generally increases catalytic activity, while higher calcination temperatures reduce metal dispersion and affect the properties of metal species.
SUSTAINABLE ENERGY & FUELS
(2021)
