Review
Nuclear Science & Technology
Lotanna Ohazuruike, Kyung Jae Lee
Summary: This study aims to provide a comprehensive review on the illitization process of bentonite, covering basic clay mineralogy, smectite expansion, mechanisms and observation of illitization, and illitization in Engineered Barrier Systems (EBS). Understanding of smectite illitization is crucial for securing the safety and integrity of nuclear waste disposal systems using bentonite buffer. This thorough review study is expected to provide essential and concise information for the preventive EBS design.
NUCLEAR ENGINEERING AND TECHNOLOGY
(2023)
Article
Geochemistry & Geophysics
Afonso D. Macheca, Antonio B. Mapossa, Antonio J. Cumbane, Asmina E. Sulemane, Shepherd M. Tichapondwa
Summary: This study investigates the Na2CO3 activation of calcium bentonite clay and evaluates the influence of different conditions on its ion exchange capacity. The results demonstrate that the concentration of Na2CO3, activation temperature, and activation time significantly affect the ion exchange capacity and Na/Ca ratio of the clay. The experimental findings further confirm the structural and property changes of the calcium bentonite clay after activation.
Article
Geosciences, Multidisciplinary
Jennifer Pickering, Natasha Morris, Brian Driskill, Neal Auchter, Dallin Laycock
Summary: The study focuses on the regional stratigraphic correlation facilitated by altered volcanic ash preserved as bentonite clay within sedimentary depositional units. A particular bentonite ash bed, identified at a distinct stratigraphic position, is shown to have originated from the same volcanic center based on geochemical analyses and petrophysical correlations. This discovery has implications for regional chronostratigraphic correlation in Late Paleozoic western equatorial Pangea.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Chemistry, Physical
Wei Zhang, Shanxiong Chen, Kaiwen Tong, Shichang Li, Kang Huang, Zhangjun Dai, Lijiao Luo
Summary: Understanding the swelling properties of clay minerals is crucial for environmental science and engineering applications. Studies have shown that interlayer cations and layer charge location significantly impact the swelling behavior of clay minerals.
JOURNAL OF PHYSICAL CHEMISTRY C
(2022)
Article
Chemistry, Physical
Luka Badurina, Branimir Segvic
Summary: This study presents a new approach to investigate the migration of trace elements during the weathering of volcanic glass using in situ laser ablation inductively coupled plasma mass spectrometry glass analyses and spatially related illite-smectite analyses. The results suggest that under favorable geological conditions, clay minerals may play an important role in the enrichment of rare earth elements and the formation of potential ion adsorption-type deposits.
Article
Geochemistry & Geophysics
Carolin Podlech, Nicole Matschiavelli, Markus Peltz, Sindy Kluge, Thuro Arnold, Andrea Cherkouk, Artur Meleshyn, Georg Grathoff, Laurence N. Warr
Summary: Bentonite is proposed as a potential backfill material for sealing high-level radioactive waste in underground repositories due to its low hydraulic conductivity, self-sealing ability and high adsorption capability. However, the alteration of smectite is mainly attributed to the nature of the bentonite, pore water chemistry and temperature. Microbial influence on the analyzed parameters was not significant within the two years of experimentation.
Article
Geochemistry & Geophysics
Shanshan Yang, Deng Liu, Weili Zheng, Qigao Fan, Hongmei Wang, Linduo Zhao
Summary: Clay minerals play a significant role in the iron pools in soils, and the redox state of iron in clay minerals can greatly impact soil properties. The dissolved organic matter derived from biochar has become an important fraction of soil organic carbon. However, our understanding of the effects of biochar-derived dissolved organic matter on soil biogeochemical processes, particularly iron cycling, is limited.
APPLIED GEOCHEMISTRY
(2023)
Article
Multidisciplinary Sciences
Ahmad Patel, Egerton D. C. Hingston, Molla Demlie
Summary: This study investigates the suitability of bentonite from Imerys mine in South Africa for use in geosynthetic clay liners. The results indicate that the bentonite is of medium quality and requires activation to be fully suitable.
SOUTH AFRICAN JOURNAL OF SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Jing Yang, Jie Wang, Chuanfang Xie, Yang Zhou, Liang Wei, Xiande Yang
Summary: Carbon modified TiO2 pillared illite/smectite (C-Ti(I/S)) composites were synthesized to degrade the carcinogenic cationic dye Rhodamine B (RhB) under visible light irradiation. The C-Ti(I/S) composites showed higher photocatalytic activity, with about 80% degradation of RhB achieved by the C-Ti(I/S)-3 composite after 120 min, compared to 40% for C and 60% for Ti(I/S). Moreover, the C-Ti(I/S)-3 composite exhibited good photocatalytic stability and the oxidation of RhB mainly involved h(+) and O-2(-).
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Geochemistry & Geophysics
Shingo Yokoyama, Misato Shimbashi, Daisuke Minato, Yasutaka Watanabe, Andreas Jenni, Urs Mader
Summary: The experiment revealed that the interaction between cement and bentonite can lead to various degrees of mineralogical changes, but over a 10-year period, detectable changes in the mineralogical nature of montmorillonite did not occur.
Article
Chemistry, Physical
Wenjian Li, Feng Yan, Yinyu Xiang, Wei Zhang, Katja Loos, Yutao Pei
Summary: This study proposes using 2D smectite clay (SC) nanosheets to enhance the surface charge density of traditional triboelectric-negative materials. By blending SC nanosheets with polyvinylidene fluoride (PVDF) at an optimal concentration of 5 wt%, the SC-TENG shows significantly improved output performance. The instantaneous output power density of the SC-TENG is increased from 15 mW/m(2) to 1450 mW/m(2).
Article
Crystallography
Jorge Luis Costafreda, Domingo Alfonso Martin
Summary: This research aimed to investigate the pozzolanic properties of bentonites found at the San Jose-Los Escullos deposit for the manufacturing of durable and environmentally compatible pozzolanic cements, mortars, and concretes. The study conducted mineralogical, petrological, chemical, and thermogravimetric analyses on the samples, showing potential for the materials to be used as quality pozzolans in construction.
Article
Geochemistry & Geophysics
S. J. Ralston, T. S. Peretyazhko, B. Sutter, D. W. Ming, R. V. Morris, A. Garcia, A. Ostwald
Summary: The abundance of smectites on Mars suggests the presence of water-rich, neutral-to-alkaline pH conditions. However, the lack of carbonates, which are expected to form under similar conditions, raises questions. Experimental studies have shown the formation of smectites in acidic environments, but the mechanisms involved are not fully understood.
EARTH AND PLANETARY SCIENCE LETTERS
(2023)
Article
Food Science & Technology
Ismail Zabiulla, Venkataramaiah Malathi, H. V. L. N. Swamy, Jaya Naik, Lane Pineda, Yanming Han
Summary: The experiment investigated the efficacy of a smectite-based clay binder in reducing the toxicological effects of aflatoxin B-1 in broiler chickens. The results showed that supplementation of this clay binder improved growth performance, reduced liver toxicity, and enhanced humoral immune response in broilers.
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
Chemistry, Physical
Yadeta C. Chemeda, Dimitri Deneele, George E. Christidis, Guy Ouvrard
APPLIED CLAY SCIENCE
(2015)
Editorial Material
Chemistry, Physical
G. E. Christidis, Michael Ploetze, Katja Emmerich, Helge Stanjek
Article
Chemistry, Physical
Artur Kuligiewicz, Arkadiusz Derkowski, Katja Emmerich, George E. Christidis, Constantinos Tsiantos, Vassilis Gionis, Georgios D. Chryssikos
CLAYS AND CLAY MINERALS
(2015)
Article
Multidisciplinary Sciences
Christos D. Georgiou, Henry J. Sun, Christopher P. Mckay, Konstantinos Grintzalis, Ioannis Papapostolou, Dimitrios Zisimopoulos, Konstantinos Panagiotidis, Gaosen Zhang, Eleni Koutsopoulou, George E. Christidis, Irene Margiolaki
NATURE COMMUNICATIONS
(2015)
Article
Chemistry, Physical
E. Koutsopoulou, G. E. Christidis, I. Marantos
Article
Geochemistry & Geophysics
Kenneth J. T. Livi, George E. Christidis, Peter Arkai, David R. Veblen
AMERICAN MINERALOGIST
(2008)
Review
Chemistry, Physical
George E. Christidis
APPLIED CLAY SCIENCE
(2008)
Article
Chemistry, Physical
Yadeta C. Chemeda, George E. Christidis, N. M. Tauhid Khan, Eleni Koutsopoulou, Vicky Hatzistamou, Vassilios C. Kelessidis
APPLIED CLAY SCIENCE
(2014)
Article
Chemistry, Physical
A. A. Masoud, G. Christidis, K. Koike
Article
Chemistry, Physical
G. E. Christidis, E. Koutsopoulou
Article
Chemistry, Physical
Evangelos N. Skoubris, Georgios D. Chryssikos, George E. Christidis, Vassilis Gionis
CLAYS AND CLAY MINERALS
(2013)
Article
Chemistry, Physical
George E. Christidis, Christine M. Shriner, Haydn H. Murray
CLAYS AND CLAY MINERALS
(2014)
Article
Geochemistry & Geophysics
Danae Venieri, Iosifina Gounaki, George E. Christidis, Charles W. Knapp, Petros Bouras-Vallianatos, Effie Photos-Jones
Article
Archaeology
E. Photos-Jones, G. E. Christidis, M. Piochi, C. Keane, A. Mormone, G. Balassone, V. Perdikatsis, A. Leanord
JOURNAL OF ARCHAEOLOGICAL SCIENCE-REPORTS
(2016)
