Article
Environmental Sciences
Rongyue Geng, Longmiao Yuan, Leiping Shi, Shirong Qiang, Yuqiang Li, Jianjun Liang, Ping Li, Guodong Zheng, Qiaohui Fan
Summary: The regulation effect of Aspergillus niger on the sorption behavior of U(VI) on kaolinite and illite was studied, showing that only inner-sphere complexes were present on the biocomposites. Microspectroscopy tests revealed coordination of U(VI) with phosphate, amide, and carboxyl groups on the biocomposites, while XPS found partial reduction of U(VI) to U(IV) in the presence of A. niger.
Article
Crystallography
Wei-Teh Jiang, Yolin Tsai, Xisen Wang, Hannah J. Tangen, Jessica Baker, Lori Allen, Zhaohui Li
Summary: This study investigated the sorption characteristics of clay minerals for acridine orange (AO). It was found that clay minerals have higher affinities for AO than inorganic cation Zn2+. Cation exchange was identified as the dominating mechanism for AO sorption. Molecular dynamics simulation results showed that AO formed monolayers and bilayers on the mineral surfaces of non-swelling clay minerals and in the interlayer of swelling clay minerals. Therefore, clay minerals are good candidates for efficient removal of cationic dyes from solution.
Article
Engineering, Environmental
Jeonghwan Hwang, Weon Shik Han, Sungwook Choung, Jung-Woo Kim, Heejun Suk, Jaehyun Lee
Summary: The sorption of Cs+ on illitic clays is influenced by the multiple sorptive sites, including frayed edge, type II, and planar sites. The sorption capacities at these sites depend on the illite content and crystallinity of the clays. The frayed edge sites predominantly sorb Cs+ at low concentrations, while the type II and planar sites contribute to Cs+ sorption at higher concentrations.
JOURNAL OF HAZARDOUS MATERIALS
(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
Energy & Fuels
Quan Chen, Moataz O. Abu-Al-Saud, Subhash C. Ayirala, Ali A. AlYousef
Summary: Low salinity waterflooding (LSWF) disrupts the geochemical equilibrium between formation brine and reservoir rock minerals leading to carbonate mineral dissolution. The cation exchange process softens the injected low salinity brine to maintain saturation for carbonate minerals, facilitating the propagation of mineral dissolution waves.
Article
Environmental Sciences
Fanqi Jing, Junjie Guan, Wei Tang, Jiawei Chen
Summary: The synthesis of clay-biochar composite has been recognized as an effective method for pollutant removal, however, the interaction between clay mineral and biomass and their sorption capacity for contaminants are not well understood. This study investigated the effects of different types of biochar and clay minerals on the removal of pollutants. The results showed that clay minerals could enhance the reaction and structure of biomass, and different combinations of materials had different sorption capacities for pollutants.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Thilakshani Atugoda, Chaminda Gunawardane, Mahtab Ahmad, Meththika Vithanage
Summary: Modification of biochar with zeolite improved the adsorption capacity for antibiotics removal from water, with SWBC-Z showing the highest adsorption capacity of 93.65 mg g(-1) for ciprofloxacin. The experiments confirmed the chemisorption and physisorption interactions on the biochar surface, and the FTIR analysis and electron microscopy supported the incorporation of zeolite minerals into the modified biochar. Thermodynamic data indicated a spontaneous and exothermic reaction between ciprofloxacin and both biochars, showing the enhanced overall adsorption performance of SWBC-Z.
Article
Chemistry, Physical
Abhishek Soni, G. N. Patey
Summary: Recent experiments have shown that some mica (001) surfaces can efficiently nucleate ice, with B-mica and H-mica being effective while K-mica is not. The surfaces stabilize a mixed-phase ice nucleus with a unique structure, different from traditional ice, consisting of hexagonal and cubic ice layers stacked in a specific order. The study highlights the relationship between surface composition, morphology, and ice nucleation, shedding new light on the process.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Environmental Sciences
Yaniv Freiberg, Pinchas Fine, Mikhail Borisover, Irit Levkovitch, Shahar Baram
Summary: Dissolved organic matter (DOM) from biosolids can alter the sorption of inorganic phosphorus (IP) to soils, affecting its bioavailability. Clay mineralogy and solution composition play a role in MOD effects on IP sorption. This study investigates the impact of DOM on IP sorption in different soils dominated by different clay minerals, providing insights into the mechanisms of DOM's effect on IP sorption.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Engineering, Environmental
Jun Wu, Wenzhong Zhang, Chunping Li, Erdan Hu
Summary: The impacts of Fe(III) and Cu(II) on the sorption of atrazine and prometryn on different clay minerals vary, with Fe(III) showing enhancement in sorption on smectite but little effect on illite and kaolinite, while Cu(II) promotes sorption on smectite under alkaline conditions. Co-sorption studies also reveal different trends in sorption behavior between the minerals and metal ion preloading.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Environmental Sciences
Daiana Micheli Perdoncini, Luana Dalacorte, Luis Felipe Silva Oliveira, Claudete Gindri Ramos, Edson Campanhola Bortoluzzi
Summary: Experimental results showed that metabasalt powder as an adsorbent agent of nutrients in LSW can effectively reduce the pollutant concentration in the liquid fraction and promote ion accumulation in the solid fraction.
WATER AIR AND SOIL POLLUTION
(2022)
Article
Geochemistry & Geophysics
Chi Zhang, Libin Liu, Hanzhong Jia
Summary: The molecular dynamics simulation reveals the molecular mechanisms of the exchange processes of heavy metals in the interlayer region of clay minerals, which is crucial for understanding the geochemical cycle of these elements. The results demonstrate that isomorphous substitution of Mg for Al can reduce the coordination number of edge Al and promote the formation of water films through H-bonding interaction. The rates of cation exchange follow the order of Pb2+ > Cr3+ > Cd2+ > Ag+ > Ni2+ > Cu2+, with Ag+ showing the highest exchange amount. A small amount of Cl- is exchanged along with the multivalent cations. The study also suggests that electrostatic interaction is the dominant driving force for cation exchange.
APPLIED GEOCHEMISTRY
(2023)
Article
Environmental Sciences
Simon Weldon, Bert van der Veen, Eva Farkas, Nazli Pelin Kocaturk-Schumacher, Alba Dieguez-Alonso, Alice Budai, Daniel Rasse
Summary: This study conducted a quantitative analysis of the sources of variability in NH4+ sorption to biochar and identified which biochar traits are more favorable for high sorption capacity. The results showed that unmodified biochar has lower sorption capacity for NH4+ than previously reported, and activation can improve sorption capacity but to a limited extent. Methodology, such as pH control and ash removal, significantly affected sorption estimates.
Article
Chemistry, Physical
Sen Yang, Xiantang Liu, Gang Yang
Summary: This study uses molecular dynamics simulations to investigate cation exchange mechanisms at clay interfaces, revealing different selectivities for various binary ion systems and highlighting the strong coupling between thermodynamics, kinetics, and confinement effects. The results provide new insights into cation exchange processes at clay interfaces and offer explanations for experimental observations at the molecular level.
APPLIED CLAY SCIENCE
(2021)
Article
Environmental Sciences
Adel Ali Al-Gheethi, Qasdina Marsya Azhar, Ponnusamy Senthil Kumar, Abdiadim Abdirizak Yusuf, Abdullah Khaled Al-Buriahi, Radin Maya Saphira Radin Mohamed, Muhanna Mohammed Al-shaibani
Summary: The review focused on the efficiency of different adsorbents, particularly agricultural waste adsorbents, for removing RhB dye from wastewater. It was found that agricultural waste adsorbents have high potential for RhB removal, with excellent removal performance and high adsorption capacity.
Article
Chemistry, Physical
Wei-Teh Jiang, Yolin Tsai, Xisen Wang, Zhaohui Li
APPLIED CLAY SCIENCE
(2020)
Article
Chemistry, Physical
Po-Hsiang Chang, Zhaohui Li, Wei-Teh Jiang
APPLIED CLAY SCIENCE
(2020)
Article
Chemistry, Multidisciplinary
Wei-Teh Jiang, Yolin Tsai, Xisen Wang, Zhaohui Li
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2020)
Article
Chemistry, Multidisciplinary
Jessica Hebert, Lijuan Wang, Xisen Wang, Jessica Baker, Nick Rivera, Michael Troedel, Zhaohui Li
Summary: The study found that the specific surface area and cation exchange capacity of 1:1 layered clay minerals play a key role in the removal of safranin O, while solution pH and ionic strength have less influence. Experimental results suggested that bilayer SO formation occurs on halloysite nano clay surfaces at high loading levels, while monolayer SO formation occurs on kaolinite surfaces.
SEPARATION SCIENCE AND TECHNOLOGY
(2021)
Article
Biochemistry & Molecular Biology
Yan Shi, Songtao Zhong, Zhaohui Li
Summary: The study showed that by using MBR to treat bath wastewater, the water quality can meet or exceed the urban miscellaneous water standard of China, and the processing cost is lower than tap water, demonstrating both cost savings and conservation of natural resources.
Article
Crystallography
Qingfeng Wu, Kristen Carlson, Qi Cheng, Xisen Wang, Zhaohui Li
Summary: The interactions between cationic dyes and negatively charged mineral surfaces, specifically palygorskite and sepiolite, were investigated in this study. It was found that the dimer molecules formed on the surface of the minerals contributed to the higher TB uptake in addition to cation exchange. Palygorskite was shown to be a better carrier for cationic dyes due to its limited SSA and large CEC values, while sepiolite had a loosely dimeric formation due to its large SSA and limited CEC values.
Editorial Material
Materials Science, Multidisciplinary
Zhaohui Li, Guocheng Lv, Jianxi Zhu
ADVANCES IN MATERIALS SCIENCE AND ENGINEERING
(2021)
Article
Crystallography
Wei-Teh Jiang, Yolin Tsai, Xisen Wang, Hannah J. Tangen, Jessica Baker, Lori Allen, Zhaohui Li
Summary: This study investigated the sorption characteristics of clay minerals for acridine orange (AO). It was found that clay minerals have higher affinities for AO than inorganic cation Zn2+. Cation exchange was identified as the dominating mechanism for AO sorption. Molecular dynamics simulation results showed that AO formed monolayers and bilayers on the mineral surfaces of non-swelling clay minerals and in the interlayer of swelling clay minerals. Therefore, clay minerals are good candidates for efficient removal of cationic dyes from solution.
Article
Crystallography
Yan Shi, Xisen Wang, Xin Wang, Kristen Carlson, Zhaohui Li
Summary: Research on dye removal has mainly focused on single solutions, but in reality, industrial wastewater contains mixed dyes. Most studies use organic sorbents and clay minerals/zeolites, but the evaluation of factors controlling dye removal from mixed solutions is limited.
Article
Engineering, Chemical
Yan Shi, Jessica Baker, Changping Feng, Xisen Wang, Zhaohui Li
Summary: This study systematically investigated the removal of toluidine blue dye by kaolinite and halloysite clay minerals under different physicochemical conditions. The results showed that both the cation exchange capacity and specific surface area of the minerals played a critical role in dye removal. The study suggests that clay minerals with high cation exchange capacity and large specific surface area values are good candidates for the removal of cationic dyes from water.
ADVANCED POWDER TECHNOLOGY
(2022)
Article
Crystallography
Xisen Wang, Jessica Baker, Kristen Carlson, Zhaohui Li
Summary: This study tested the removal of anionic dyes MO and ARS from water using negatively charged clinoptilolite and investigated the mechanisms behind it. The results showed that clinoptilolite had a strong affinity for anionic dyes, and the removal might be achieved through electrostatic attraction or hydrogen bonding. Molecular dynamic simulations and FTIR analyses supported the speculation. This study provides a new perspective for the innovative use of negatively charged Earth materials as sorbents for the removal of certain anionic dyes.
Editorial Material
Crystallography
Georgy Lazorenko, Anton Kasprzhitskii, Zhaohui Li
Article
Crystallography
Yuxin Li, Guocheng Lv, Limei Wu, Zhaohui Li, Libing Liao
Summary: The study found that natural needle-like goethite is a good precursor for obtaining hematite with a large specific surface area and exposed (110) facets. Compared to goethite, the derived hematite showed a sixfold increase in chromium removal capacity under the same experimental conditions. Structural model fitting and molecular dynamic simulations confirmed the superior adsorption performance of hematite for chromium. Based on these findings, efficient and economic permeable reactive barrier (PRB) materials were optimized, with a potential application in PRB medium material field highlighted by a column lifespan of 610 PVs at an initial concentration of 20 mg/L Cr (VI).
Article
Crystallography
Zhaohui Li, Hanlie Hong, Libing Liao, Hongping He
Summary: X-ray diffraction and elemental analyses were conducted on the boundary layer and surrounding layers near Agost and Caravaca, Spain. The results showed an increase in clay minerals and elevated concentrations of certain major and trace elements in the boundary layer. Correlation analyses between selected trace elements and rare earth elements showed good agreements, except for lower contents of certain elements, suggesting the need for further detailed comparisons.
Article
Crystallography
Wenfang Zhou, Kristen Carlson, Qingfeng Wu, Xisen Wang, Shangping Xu, Zhaohui Li
Summary: The extensive use of synthetic materials in modern society poses a significant challenge to environmental and water quality. This has led to numerous studies focused on the use of novel materials as sorbents or catalysts for the removal of emerging contaminants from water. Halloysite, a 1:1 layered clay mineral, has shown potential for removing both cationic and anionic contaminants due to its moderate cation exchange capacity and positive charges on the aluminum hydroxyl sheets. The findings of this study suggest that halloysite can serve as a sorbent for the simultaneous removal of organic contaminants with different charges, presenting a new perspective that requires further evaluation and expansion.
