Article
Multidisciplinary Sciences
Jemal Mohammed Yassin, Yoseph Shiferaw, Abebe Tedla
Summary: Natural clay is considered an appropriate, effective, and low-cost material for purifying edible oils by removing impurities and colored substances. This study investigated the use of acid-activated clays from Ethiopia for bleaching Niger oil, with sulfuric acid activation showing the highest efficiency compared to other acids. The results suggest the potential application of acid-activated clays for the treatment and purification of oils to enhance flavor, taste, and shelf life of oil products.
Article
Engineering, Environmental
Joao Pires, Silvia Carvalho
Summary: Pillared interlayered clays (PILCs) with zirconium oxide pillars were prepared from a montmorillonite raw clay. The pillaring technique significantly increased the specific surface area and developed micro and mesoporosity. The zirconium oxide PILCs exhibited high selectivity in the separation of hexane isomers.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Daniel Dodoo, Godfred Appiah, George Acquaah, Thomas Dodoo Junior
Summary: Large amounts of bauxite-liquid residue generated during aluminium production have detrimental effects on human and environmental health. This study investigated the use of natural clays (NCs) and acid-activated clays (AACs) for treating bauxite-liquid residue through fixed-bed column adsorption. The breakthrough curves were successfully fitted with the Bohart-Adams, Thomas, and Yoon-Nelson models, and two regeneration cycles showed high regeneration efficiencies for both NCs and AACs. The study found that AACs were the best candidates for treating bauxite-liquid residue, significantly reducing various parameters below tolerance levels.
Article
Engineering, Environmental
Uziel Ortiz-Ramos, Roberto Leyva-Ramos, Esmeralda Mendoza-Mendoza, Antonio Aragon-Pina
Summary: This study investigated the adsorption of tetracycline onto different clays and analyzed the adsorption mechanisms and influencing factors. Bentonite showed the highest adsorption capacity due to its swelling characteristic, interlayer cations, and tetracycline molecular size. Adsorption occurred on the external surface and in the interlayer space of bentonite, with both physical and chemical mechanisms involved. The adsorption process was partially reversible and endothermic.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Materials Science, Ceramics
Sylvain Tome, Dzoujo T. Hermann, Victor O. Shikuku, Stephen Otieno
Summary: In this study, two geopolymers were prepared using volcanic ash as the precursor material, through acid activation and alkaline activation methods. The alkaline activated geopolymer exhibited higher adsorption capacity, faster adsorption kinetics, and better thermodynamic properties compared to the acid activated geopolymer, suggesting its superior performance as a sorbent for dye removal.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Smitha Venu Sreekala, Athira Vayalveettil, Jayasooryan Kazhuthuttil Kochu, Resmi Thoppil Ramakrishnan, Harikumar Puthenveedu Sadasivan Pillai
Summary: An integrated photocatalytic adsorbent system made of bentonite clay and titanium dioxide was successfully synthesized. The nanocomposite exhibited efficient adsorption/degradation of organic pollutants and heavy metal adsorption in industrial wastewater due to its small particle size and high surface area. This eco-friendly and cost-effective material has great potential for wastewater treatment.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Inorganic & Nuclear
Abdelouahed Amar, Abderrahim Kali, Ilyasse Loulidi, Youngjae Cho, Mohamed Sadoq, Chaimaa Hadey, Hafssa Atlass, Smail Imame, Maria Jabri, Hassane Lgaz, Fatima Boukhlifi
Summary: A Moroccan clay enriched with silica and alumina was used to adsorb phenol from aqueous solutions. Various characterization techniques were employed to examine the physical and chemical properties of the clay. The adsorption kinetics were rapid and followed the pseudo-second-order model, with an impressive adsorption capacity near 97 mg/g. Investigation into the interaction mechanism between phenol and clay revealed the nucleophilic sites in phenol engaging with the positive sites of the silica and alumina phases. The clay also showed potential for reuse in pottery production without significant alterations in flexural strength.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Article
Materials Science, Multidisciplinary
Gonzalo R. Quezada, Eder Piceros, Pedro Robles, Carlos Moraga, Edelmira Galvez, Steven Nieto, Ricardo I. Jeldres
Summary: The study found that the interaction between PAA and mineral surfaces varies under different salt concentrations, with salinity impacting the adsorption effects on different systems, and montmorillonite showing the strongest adsorption.
Review
Biochemistry & Molecular Biology
Juraj Bujdak
Summary: This critical review examines the literature on the adsorption of dyes on clay minerals and identifies the most serious issues. Insufficient characterization of adsorbents, the influence of impurities, and inappropriate models are highlighted as fundamental problems. The paper discusses the main processes accompanying adsorption in colloidal systems and analyzes the relationship between system stability and dye adsorption. Methodological procedures for determining and evaluating adsorption are critically reviewed. A summary of modified clay minerals and complex systems for the adsorption of organic dyes is provided. The review serves as a guide for improving characterization, determining adsorption, evaluating results, and interpreting data accurately.
Article
Engineering, Chemical
Qicheng Feng, Ga Zhang, Qian Zhang, Wenjuan Zhao
Summary: This study investigates the synergistic effects of Cu2+ and Pb2+ on the flotation behavior, surface properties, and xanthate adsorption of sulfidized hemimorphite. The results show that the flotation recovery of sulfidized hemimorphite increases after synergistic activation with Cu2+ and Pb2+, leading to enhanced surface hydrophobicity and the formation of multi-metal sulfide species.
SEPARATION AND PURIFICATION TECHNOLOGY
(2024)
Article
Chemistry, Inorganic & Nuclear
Kamal Samrane, Ahmed Bouhaouss
Summary: Cadmium and trace metals pose a challenge to the fertilizer industry. This study explores the potential of adsorption technology for removing these contaminants from wet phosphoric acid. Results showed effective adsorption of lead, but limited adsorption of cadmium and nickel. Chemical activation improved adsorption efficiency for chromium and arsenic. Sulfur-impregnated activated carbon did not exhibit significant adsorption capacity.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Thong Nguyen-Minh Le, Thu Bao Nguyen Le, Phat Tan Nguyen, Trang Thuy Nguyen, Quang Ngoc Tran, Toan The Nguyen, Yoshiyuki Kawazoe, Thang Bach Phan, Duc Manh Nguyen
Summary: Direct oxidation of methane over oxo-doped ZIF-204, a bio-mimetic metal-organic framework, is investigated using first-principles calculations. The modified ZIF-204 with doped oxo species is found to be a promising catalyst for methane oxidation, as it exhibits weak binding and efficient adsorption energy. The presence of the oxo group enables the reactions to occur via both a concerted direct oxo insertion mechanism and a hydrogen-atom abstraction radical rebound mechanism.
Article
Energy & Fuels
Elias Costa de Souza, Alexandre Santos Pimenta, Alfredo Jose Ferreira da Silva, Paula Fabiane Pinheiro do Nascimento, Joshua O. Ighalo
Summary: In this study, the effect of nitric acid treatment on the adsorption capacity of metals by charcoal was investigated, revealing that it enhanced the adsorption capacity significantly. The Langmuir model best described the adsorption isotherms, with a maximum removal of 96% of Cu(II) ions, suggesting that adsorption was spontaneous and occurred through ion exchange and electrostatic interaction mechanisms. Additionally, the presence of multiple metal ions in the solution increased the total adsorption capacity.
BIOMASS CONVERSION AND BIOREFINERY
(2021)
Article
Environmental Sciences
Juliana Paulino, Anamalia Silva, Danilo Santos, Patricia Nagliate, Lucas Meili
Summary: This study used bibliometric analysis to explore the extent and trends of research on the use of layered double hydroxides (LDHs) as adsorbents for water treatment. The findings revealed that China, India, and Japan were the most productive countries in this field, and important journals in the environmental area published numerous high-impact articles. The network of keywords used by the authors highlighted the focus on the efficiency, composition, synthesis routes, and association with other materials and techniques in the removal of pollutants by LDHs.
ENVIRONMENTAL MANAGEMENT
(2023)
Article
Chemistry, Physical
Griffin Ruehl, S. Elizabeth Harman, Olivia M. Gluth, David H. Lavoy, Charles T. Campbell
Summary: The heats of adsorption of formic acid on clean and oxygen-predosed Cu(111) were measured, providing important benchmarks for computational models of adsorbates on Cu catalysts. The results also showed the bond enthalpies and enthalpies of formation of formate on Cu(111), Ni(111), and Pt(111), and revealed the underestimation of formate stability by DFT calculations.
Article
Geosciences, Multidisciplinary
Aida Affouri, Mabrouk Eloussaief, Nejib Kallel, Mourad Benzina
ARABIAN JOURNAL OF GEOSCIENCES
(2015)
Article
Geosciences, Multidisciplinary
Hela Triki Fourati, Moncef Bouaziz, Mourad Benzina, Samir Bouaziz
ARABIAN JOURNAL OF GEOSCIENCES
(2015)
Article
Chemistry, Multidisciplinary
Olfa Ouled Ltaief, Stephane Siffert, Sophie Fourmentin, Mourad Benzina
COMPTES RENDUS CHIMIE
(2015)
Article
Green & Sustainable Science & Technology
Abdessalem Omri, Mourad Benzina
ENVIRONMENTAL PROGRESS & SUSTAINABLE ENERGY
(2016)
Article
Environmental Sciences
Wiem Hamza, Chaker Chtara, Mourad Benzina
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2016)
Article
Environmental Sciences
Sana Ghrab, Mabrouk Eloussaief, Stephanie Lambert, Samir Bouaziz, Mourad Benzina
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2018)
Editorial Material
Environmental Sciences
Boubaker Elleuch, Farah Bouhamed, Mabrouk Elloussaief, Madi Jaghbir
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2018)
Article
Environmental Sciences
Nada Zaanouni, Mariem Gharssallaoui, Mabrouk Eloussaief, Slimane Gabsi
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2018)
Article
Environmental Sciences
Wiem Hamza, Nesrine Dammak, Haithem Bel Hadjltaief, Mabrouk Eloussaief, Mourad Benzina
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2018)
Article
Geosciences, Multidisciplinary
Mabrouk Eloussaief, Haithem Bel Hadjltaief, Nessrine Dammak, Mourad Benzina
ARABIAN JOURNAL OF GEOSCIENCES
(2018)
Article
Chemistry, Physical
Fathi Allouche, Mabrouk Eloussaief, Sana Ghrab, Nejib Kallel
CLAYS AND CLAY MINERALS
(2020)
Article
Environmental Sciences
Mabrouk Eloussaief, Wiem Hamza, Ghaniya Ghorbali, Nejib Kallel, Mourad Benzina
Summary: This study investigated an economic process for the degradation of Indigo Carmine dye using a natural carbonated concretion catalyst called aragonite. The Fe-rich aragonite exhibited high photocatalytic oxidation activity in the Fenton and photo-Fenton process, effectively removing the dye from aqueous solutions. The study confirmed the potential of aragonite as a cost-effective alternative catalyst in industrial effluent purification.
WASTE AND BIOMASS VALORIZATION
(2021)
Article
Environmental Sciences
Mabrouk Eloussaief, Salima Chakroun, Nejib Kallel, Mourad Benzina
EURO-MEDITERRANEAN JOURNAL FOR ENVIRONMENTAL INTEGRATION
(2020)
Proceedings Paper
Green & Sustainable Science & Technology
Imen Saadaoui, Mabrouk Eloussaief
RECENT ADVANCES IN ENVIRONMENTAL SCIENCE FROM THE EURO-MEDITERRANEAN AND SURROUNDING REGIONS, VOLS I AND II
(2018)
Article
Engineering, Chemical
Lotfi Ghnainia, Mabrouk Eloussaief, Kamel Zouari, Chedly Abbes
APPLIED PETROCHEMICAL RESEARCH
(2016)
Article
Chemistry, Physical
Nadine J. Kanik, Artur Kuligiewicz, Jeffrey T. Cullen
Summary: This study examined the effects of different pre-treatments on the structural H-isotope composition of clay minerals. The results showed that different pre-treatments had varied impacts on different clay minerals, and the choice of pre-treatment should be based on the specific properties and mineralogy of the samples.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
Lorenzo Lisuzzo, Giuseppe Cavallaro, Stefana Milioto, Giuseppe Lazzara
Summary: This study proposes Pickering emulsions based on wax and halloysite clay nanotubes for coating silk sutures to increase their loading capacity towards eosin. The presence of halloysite/wax microspheres on the surface of silk sutures has also been explored for controlled release of hydrophobic drugs. The influence of the coating on the thermal and mechanical properties of the sutures has been studied using various techniques. In conclusion, the wax/halloysite Pickering emulsions can successfully generate hydrophobic microdomains on the surface of silk sutures, leading to enhanced flexibility and improved loading capacity towards eosin.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
Bruna F. Alves, Rita C. P. Nunes, Luiz C. Bertolino, Elizabete F. Lucas
Summary: Operational problems in the oil industry caused by the precipitation of paraffins can be prevented by using polymeric additives. This article evaluates the use of polymeric nanocomposites as pour point reducers in different types of crude oil and finds that they are more efficient than pure poly(ethylene-covinyl acetate) (EVA) in reducing the pour point. The nanocomposites also modify the wax crystals and reduce the viscosity of the oil samples.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
K. A. Daniels, C. C. Graham, A. C. Wiseall, J. F. Harrington, P. Sellin
Summary: Geological storage with clay buffer is widely preferred for removing hazardous radioactive waste. The impact of fluid salinity and void space on the swelling behavior of barrier bentonites was examined through experiments. The findings suggest that clay swelling is suppressed at higher salinities, which affects the void-filling process.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
N. Werling, A. Kuligiewicz, A. Steudel, R. Schuhmann, F. Dehn, K. Emmerich
Summary: Thermal treatment of clay minerals can be used to produce building materials and environmentally friendly binders. This process involves dehydration, dehydroxylation, breakdown of structure, and recrystallization of high temperature phases. Rehydration and rehydroxylation are important factors to consider for geopolymers and SCM.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
Xuan Wang, Hao Ding, Zhuoqun Xu, Jianmeng Zhang, Yanbin Yao
Summary: Rutile nano-TiO2 was loaded onto the surface of sericite to prepare sericite-rutile composite particles, which were then modified with HDTMS and sprayed onto the substrates to form sericite-rutile/HDTMS composite coatings with UV shielding and superhydrophobic self-cleaning properties. The coating exhibited good UV shielding rate and remained superhydrophobic after UV irradiation. The hierarchical structure of the sericite-rutile composite and the low surface energy of HDTMS contributed to the superhydrophobicity and UV shielding effect of the coating.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
Kailang Sun, Taojun Zhang, Jie Zhou, Yonghong Liu, Minfeng Zeng, Zhen Yang, Ruokun Feng, Xiaorong Ren, Peng Zhang, Baoyi Wang, Xingzhong Cao
Summary: Chitosan-Pd0 nano particles encapsulated in Al, Co-pillared montmorillonite nanocomposites were successfully synthesized using a facile one-pot heat treatment method. The Al, Co pillaring effectively expanded the surface area and generated numerous mesopores in the interlayer space of the MMt. The resultant nanocomposite exhibited similar high comprehensive catalytic performances as the one prepared by the regular divided-multistep method. The encapsulation of CS chains and doping of Co in the Al pillaring also contributed to the improved catalytic performance.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
Nathalie Fagel, Isabel Israde-Alcantara, Reza Safaierad, Marttiina Rantala, Sabine Schmidt, Gilles Lepoint, Pierre Pellenard, Nadine Mattielli, Sarah Metcalfe
Summary: Environmental conditions significantly influence clay minerals, and studying clay sediments in tropical lakes can provide valuable insights into past environmental conditions. In this study, multiproxy records from sediment cores of three crater lakes in central Mexico were analyzed. The results showed that disordered kaolinite, formed through hydrolysis and hydrothermal alteration, was the predominant mineral in the sediments. The abundance of kaolinite varied in relation to organic carbon and organic matter-related elements, and showed opposite trends with lithogenic elements. Geochemical data suggested that the increase in kaolinite abundance is linked to the formation of organo-mineral aggregates and lake level changes in closed basins.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
M. J. Martin-Alfonso, A. Mejia, F. J. Martinez-Boza, P. Partal
Summary: The drilling industry is facing new challenges to develop eco-friendlier drilling fluids. Organic modified sepiolite dispersed in oil can be an excellent additive with suitable rheological properties. This study investigated the effect of alkyl ammonium modifiers on the microstructure and rheological properties of sepiolite-vegetable oil dispersions under high-temperature and high-pressure conditions.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
Weiquan Zhan, Siyuan Yang, Shenxu Bao, Liuyi Ren, Cheng Liu
Summary: The interaction between talc and the depressor CMC was investigated through molecular dynamics simulation and density functional theory calculation. It was found that CMC showed stronger adsorption on the edge plane of talc due to enhanced interactions with polar groups and water molecules. The study also revealed specific interactions between H atoms in CMC and O atoms in the edge plane, as well as between O atoms in CMC and Si, Mg atoms in the edge plane. Hydration shells on the basal and edge planes of talc were examined to explain the phenomenon.
APPLIED CLAY SCIENCE
(2024)
Article
Chemistry, Physical
Pierre Dramou, Yiyang Sun, Xu Ni, Fangqi Wang, Hua He
Summary: In this study, a magnetic nanocomposite was prepared and used for the separation of rutin from real samples through magnetic solid phase extraction (MSPE). The nanocomposite exhibited high specific surface area, chemical and thermal stability, water solubility, and easy separation in aqueous solution. Characterization and experiments confirmed the successful synthesis and efficient enrichment ability of the nanocomposite.
APPLIED CLAY SCIENCE
(2024)
