Article
Engineering, Environmental
Yeongkyun Son, Yoogyeong Kim, Sungjun Bae, Tae-Hyun Kim, Yuhoon Hwang
Summary: The study demonstrates that organoclays prepared using two different structurally different surfactants exhibit promising chromium adsorption efficiency for in-situ groundwater remediation, making them potential in-situ chromate adsorbents.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Multidisciplinary Sciences
Zhang Ming, Hu Dongke, Pan Shaoyu, Chen Guozhou
Summary: Permeability tests using a flexible wall permeameter were conducted to investigate the impact of bentonite-HDTMA on the permeability of Loess, a potential lining material for solid waste landfills. The results revealed that compacted Loess from the middle and lower reaches of the Yellow River in China did not meet the required impermeability standards for landfill liners. However, the permeability of Loess mixed with more than 10% bentonite ratio was significantly lower than the acceptable limit. The addition of a small amount of HDTMA slightly increased the permeability of Loess, but a certain ratio of bentonite-HDTMA still ensured impermeability.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Elahe Abedi, Mohammad Javad Amiri, Mehran Sayadi
Summary: This research investigates the sorption behavior of heavy metals and pigments onto activated bentonite clay in soybean oil under different bleaching methods, finding that the adsorption is most effective under ultrasonic bleaching method. The sorption thermodynamics is endothermic and the process is spontaneous within a certain temperature range.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2021)
Article
Materials Science, Multidisciplinary
Perla Garcia-Guzman, Luis Medina-Torres, Ma. Josefa Bernad-Bernad, Fausto Calderas, Octavio Manero
Summary: In recent years, there has been a growing interest in dietary and pharmacological agents that inhibit cholesterol intestinal absorption. These compounds have various mechanisms to inhibit cholesterol absorption, such as affecting cholesterol solubilization, interfering with cholesterol diffusion, and inhibiting molecular mechanisms responsible for cholesterol absorption. This study investigated the characterization of different clays and their cholesterol adsorption capacity. The results showed that MMT Nanoclay has the highest cation exchange capacity and lowest Z potential, while MMT K10 and K30 have the highest cholesterol adsorption due to their high surface area. Isothermal studies also suggested that MMT allows for multilayer adsorption of cholesterol through hydrophobic sites.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Environmental Sciences
Soheil Hamidi Tabrizi, Bahareh Tanhaei, Ali Ayati, Sara Ranjbari
Summary: In this study, the surface of montmorillonite K10 was successfully modified to Mt-HDA, resulting in improved removal efficiency of Tartrazine (TZ) from aqueous phase. The experimental results showed that HDA modification significantly enhanced the adsorption ability of montmorillonite towards TZ molecules, with fast adsorption process and maximum adsorption capacity of 59mg/g at 45 degrees C.
ENVIRONMENTAL RESEARCH
(2022)
Article
Engineering, Chemical
Raissa Antonelli, Geoffroy Roger Pointer Malpass, Meuris Gurgel Carlos da Silva, Melissa Gurgel Adeodato Vieira
Summary: This study investigated the adsorption behavior of antibiotic ciprofloxacin in a calcined Verdelodo clay-packed fixed-bed system. The experimental results showed a breakthrough adsorption capacity of 0.038 mmol g(-1) and a mass transfer zone of 4.29 cm. Comparison with ofloxacin adsorption performance and density functional theory computations were also conducted.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2021)
Article
Chemistry, Physical
S. A. Martin, I Perez, A. Rivera
Summary: Bentonite shows potential as a drug delivery system in the pharmaceutical industry due to its high drug loading capacity and controlled drug release properties. It efficiently adsorbs and releases vancomycin, achieving a higher load when in its monovalent cationic form. In vitro assays demonstrate that the vancomycin release profiles meet pharmaceutical standards, suggesting the potential use of Bentonite as a vancomycin carrier.
APPLIED CLAY SCIENCE
(2021)
Article
Engineering, Environmental
C. M. Aswathy, B. M. Sunil
Summary: This study evaluated the effect of inorganic contaminants on the behavior of bentonite-based landfill liner material at different blending ratios. Results showed a decrease in hydraulic conductivity, a slight reduction in unconfined compressive strength under wet conditions, and good adsorption characteristics of the blended lithomargic clay with bentonite.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2022)
Article
Chemistry, Physical
Jessica Yasmin de Morais Pinos, Leticia Barbosa de Melo, Suelen Delfino de Souza, Liziane Marcal, Emerson Henrique de Faria
Summary: This study evaluates the efficiency of surfactant-modified bentonite with amine groups in removing nickel and rhodamine-B from wastewaters. The modified bentonite showed high adsorption capacity and followed pseudo-second-order kinetics for both contaminants.
APPLIED CLAY SCIENCE
(2022)
Article
Chemistry, Physical
N. Bensid, R. Zerdoum, Z. Hattab, Y. Boutaleb, M. Bououdina
Summary: This study prepared intercalated organo-bentonite using CBDAB and investigated its effectiveness in removing benzoic and salicylic acids from wastewater. The results showed that CBDA-bent with high specific surface area and pore volume exhibited promising adsorption capabilities for SA and BA in basic media. The adsorption process was controlled by intraparticle diffusion mechanism with non-spontaneous and endothermic characteristics.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Analytical
Zakaria A. Mekawy, Ehab A. A. El Shazly, Mamdoh R. Mahmoud
Summary: This study investigated the adsorption behavior of Zr-95(IV), Hf-181(IV) and Nb-95(V) radionuclides onto bentonite and optimized the adsorption parameters. The results showed that bentonite efficiently adsorbed these radionuclides, even in the presence of high concentrations of ions.
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
(2022)
Article
Chemistry, Physical
Elif Caliskan Salihi, R. Yesim Canturk Talman, Sinem Gokturk
Summary: Surface modification of organoclays enhances their adsorption capacity for paracetamol, attributed to the contribution of hydrophobic interaction and pi dispersion interactions.
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Doris Ying Ying Tang, Kit Wayne Chew, Francesco G. Gentili, Tonni Agustiono Kurniawan, Young-Kwon Park, Heli Siti Halimatul Munawaroh, Saravanan Rajendran, Zengling Ma, Sarah Alharthii, Walaa F. Alsaniejk, Pau Loke Show
Summary: This study evaluates and compares the ability of three different clay types to remove chlorophyll from microalgae oil, finding that acid-treated bentonite clay is the most effective. High temperature and ultrasound treatment conditions also demonstrate satisfactory chlorophyll removal efficiency. Additionally, it is found that chlorophyll can be adsorbed on the clays without significantly affecting the lipid composition in the microalgae extract.
PROCESS BIOCHEMISTRY
(2023)
Article
Chemistry, Physical
Quande Wang, Michal Slany, Xuefan Gu, Zhipeng Miao, Weichao Du, Jie Zhang, Chen Gang
Summary: This study focuses on improving the tribological characteristics of water-based drilling fluids by adding graphene-based lubricants. The researchers successfully prepared highly dispersed graphite using a green and simple adsorption approach. The modified graphite significantly improved the lubrication performance of the drilling fluid, and the underlying mechanism was analyzed through various measurements. These findings provide valuable insights for the development of high-performance water-based drilling fluids.
Article
Biochemistry & Molecular Biology
Ran Wei, Yuanhua Mo, Duojiao Fu, Hongqin Liu, Baocai Xu
Summary: In this study, the modification of Na-montmorillonite (Na-Mt) with different counterions [(C11H23CONH(CH2)(2)N+(CH3)(2)(CH2)(2)N+(CH3)(2)(CH2)(2)NHCOC11H23·2Y(-), Y = CH3CO3-, C6H5COO- and Br-, 12-2-12·2Y(-)] was studied for the adsorption of phenol pollutants from water. The results showed that MMt-12-2-12·2Br(-), MMt-12-2-12·2CH(3)CO(3)(-) and MMt-12-2-12·2C(6)H(5)COO(-) achieved the optimum adsorption capacities of 115.110 mg/g, 100.834 mg/g and 99.985 mg/g, respectively, under specific conditions. The adsorption kinetics followed the pseudo-second-order model, and the adsorption isotherm fitted well with the Freundlich model. Thermodynamic parameters indicated that the adsorption of phenol was a physical, spontaneous and exothermic process. The counterions of the surfactant had an influence on the adsorption performance of MMt for phenol, especially in terms of rigid structure, hydrophobicity, and hydration.
Article
Environmental Sciences
P. Barragan-Pena, M. G. Macedo-Miranda, M. T. Olguin
ENVIRONMENTAL TECHNOLOGY
(2020)
Article
Environmental Sciences
C. Fall, L. M. Barron-Hernandez, M. T. Olguin-Gutierrez, K. M. Ba, M. Esparza-Soto, M. Lucero-Chavez
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2020)
Article
Engineering, Environmental
D. Contreras-Arzate, M. Islas-Espinoza, C. Fall, D. Alcantara-Diaz, M. T. Olguin, R. Lopez-Callejas, R. Pena-Eguiluz
JOURNAL OF ENVIRONMENTAL HEALTH SCIENCE AND ENGINEERING
(2020)
Article
Nanoscience & Nanotechnology
C. Martinez-Vieyra, E. Gutierrez-Segura, G. Lopez-Tellez, D. Alcantara-Diaz, M. T. Olguin
Summary: The study focused on the synthesis and characterization of metallic or oxide-metallic nanoparticles-natural zeolite composites for evaluating antimicrobial activity against Salmonella typhimurium and Candida albicans. The results showed differences in the kinetic parameters of cell decay between the two microorganisms and the composite materials, indicating that the antimicrobial activity depends on various factors such as microorganism characteristics, mass of the composite, and distribution of nanoparticles on zeolitic material surfaces. The study suggests that the Z-NpsAg gamma composite could be a viable alternative for water disinfection.
APPLIED NANOSCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Mohamed Abatal, M. T. Olguin, Ioannis Anastopoulos, Dimitrios A. Giannakoudakis, Eder Claudio Lima, Joel Vargas, Claudia Aguilar
Summary: In this study, biomass from Moringa oleifera seeds and leaves was used as low-cost biosorbents to remove heavy metal ions from aqueous solutions. The experimental kinetic data for both S-MO and L-MO were best described by the pseudo-second-order model, and the Langmuir model was used to determine the maximum sorption capacities for different metal ions. Overall, the biosorbents showed promising potential for the removal of Pb(II), Cd(II), Co(II), and Ni(II) from water.
Article
Biotechnology & Applied Microbiology
S. Aparicio-Vazquez, C. Fall, M. Islas-Espinoza, D. Alcantara, V Petranovskii, M. T. Olguin
Summary: The study investigated the conditioning parameters and characterization of silver-modified clinoptilolite-rich tuffs, as well as their bactericidal activity against Escherichia coli. The results show that the inhibition rate of E. coli depends on the release of silver from the modified zeolitic materials and the location of silver ions in the zeolite network. Materials conditioned at room temperature in static contact exhibited the highest bacterial inhibition rate.
ENVIRONMENTAL TECHNOLOGY & INNOVATION
(2021)
Article
Green & Sustainable Science & Technology
Mohamed Abatal, Eder C. Lima, Dimitrios A. Giannakoudakis, Joel Vargas, Ioannis Anastopoulos, Maria T. Olguin, Ismeli Alfonso
Summary: The present study investigated the performance of Pitahaya peel as a low-cost biosorbent in the removal of Co(II), Cd(II), Pb(II), and Ni(II) from single and multi-component solutions. The results showed that Pitahaya peel exhibited good biosorption performance for the metallic species, and the biosorption efficiency changed when the metallic species were mixed. The biomass could be regenerated using nitric acid solution and reused for multiple adsorption and desorption cycles.
Article
Environmental Sciences
C. Fall, L. M. Barron-Hernandez, V. E. Gonzaga-Galeana, M. T. Olguin
Summary: The study investigates the mechanisms and microbial communities of aerobic granular sludge (AGS) reactor involving polyhydroxyalkanoates (PHA) aerobic-storing bacteria, and explores the long-term stability and removal performances of the system. The study finds that the dominant bacteria in the system are PHA-aerobic storing bacteria instead of the expected polyphosphate and glycogen accumulating organisms, providing a stable system for organic and nitrogen removal.
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2022)
Article
Environmental Sciences
Y. Perez-Jimenez, I De-la-Rosa-Gomez, D. Alcantara, M. T. Olguin
Summary: The effect of chloride ions on the antimicrobial activity of silver composites was investigated. The adsorption of chloride ions by a composite formed by chitosan and natural zeolite with supported silver nanoparticles obtained by gamma irradiation was also considered. The presence of chloride ions in the solution was found to increase the cell decay time, while without chloride ions, the microbial mortality rate reached 100% within two hours.
INTERNATIONAL JOURNAL OF ENVIRONMENTAL SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Chemical
M. Albarran, I De-La-Rosa-Gomez, M. T. Olguin
Summary: Population growth has led to increased attention on water treatments, particularly water disinfection. This paper focuses on the bactericidal activity of silver-modified natural zeolites on suspended Escherichia coli in water, studying parameters such as electrical conductivity.
DESALINATION AND WATER TREATMENT
(2022)
Article
Chemistry, Multidisciplinary
Perfecto Barragan-Pena, Ma G. Macedo-Miranda, Maria T. Olguin
Summary: The study investigated the behavior of thiourea-modified natural clinoptilolite in removing cadmium from wastewater, demonstrating its efficiency and suggesting treatment in a two-column series.
Article
Engineering, Environmental
Mohamed Abatal, Ioannis Anastopoulos, Dimitrios A. Giannakoudakis, M. T. Olguin
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2020)
Article
Engineering, Chemical
C. A. Cima-Mukul, M. T. Olguin, M. Abatal, J. Vargas, Jesus Alberto Barron-Zambrano, Alejandro Avila-Ortega, A. A. Santiago
DESALINATION AND WATER TREATMENT
(2020)
Article
Engineering, Chemical
H. Lopez-Gonzalez, M. T. Olguin, S. Bulbulian
DESALINATION AND WATER TREATMENT
(2019)
Article
Engineering, Chemical
Y. Abdellaoui, M. T. Olguin, M. Abatal, A. Bassam, G. Giacoman-Vallejo
DESALINATION AND WATER TREATMENT
(2019)
