Article
Chemistry, Physical
Yufei Wang, Takumi Saito, Sarah Fakhreddine, Shinya Nagasaki
Summary: The adsorption affinity and mechanisms of selenate on imogolite were mechanistically evaluated to understand the potential environmental applications of imogolite for the protection of groundwater quality.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Chemistry, Physical
Sol-Chan Han, Elliot Chang, Susanne Zechel, Frank Bok, Mavrik Zavarin
Summary: This study presents a community data-driven surface complexation modelling framework, which can simulate potentiometric titration of mineral surfaces. By fitting compiled community data, representative protolysis constants can be obtained, which can reproduce potentiometric titration data from literature sources. This framework allows for the evaluation of different surface complexation model types and surface site density (SSD) on the quality of fit and protolysis constants. It provides a method to reconcile community data and produce mineral protolysis constants for robust surface complexation models in metal sorption and reactive transport modelling.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Environmental Sciences
Mengxue Li, Tianhu Chen, Haibo Liu, Xuehua Zou, Lanbao Zhu, Li Ma, Jing Wang, Yan Ding
Summary: Porous iron-carbon composites (PICCs) were synthesized to enrich phosphate from aqueous solution. The phase composition of PICCs transformed from Fe3O4 to zero-valent iron. PICCs exhibited strong magnetism with saturation magnetization of 82.02 emu/g, enabling magnetic separation. Among the samples, PICC3-7 showed the strongest enrichment on phosphate with a maximum adsorption capacity of 11.42 mg/g at pH = 5.5, T = 293 K. The choice of carbon source, the influence of anions, and the surface complexation model were investigated to understand the mechanisms of phosphate enrichment on PICCs. This information is significant for the utilization of agricultural and forestry wastes.
WATER AIR AND SOIL POLLUTION
(2023)
Article
Engineering, Chemical
Shifeng Li, Feng Lu, Shuhua Yao, Shuyan Zang
Summary: The mesoporous goethite synthesized by the hydrothermal method showed a significant potential in removing selenate and selenite from wastewater, with adsorption capacities about two orders of magnitude higher than natural goethite. XPS analysis revealed the adsorption mechanism, indicating the formation of inner-sphere complex with Se(IV) and outer-sphere complexes with Se(VI). Mesoporous goethite is expected to be a cost-effective and easy-to-prepare adsorbent for large-scale removal of selenium from industrial wastewater.
DESALINATION AND WATER TREATMENT
(2021)
Article
Environmental Sciences
Maya Engel, Juan S. Lezama Pacheco, Vincent Noel, Kristin Boye, Scott Fendorf
Summary: The study found that different organic-ferrihydrite assemblages have varying degrees of binding with Cd, Zn, and Ni, with organic functional groups introducing additional binding sites and enhancing heavy metal binding rate. Under the influence of metal Lewis acidity, the heavy metal binding effect follows the order Cd > Zn > Ni.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Chemistry, Physical
Qiang Yu, Jeremy B. Fein
Summary: Adsorption of chalcophile metals from aqueous solution by thiol resins represents an efficient means of reusing these metals and remediating waste streams. This study demonstrates the application of surface complexation modeling and experimental methods for characterizing and predicting the adsorption behavior of three thiol-based resins, and highlights the potential of this approach for the design and optimization of strategies for separating and recovering chalcophile metals.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Review
Environmental Sciences
Yubing Sun, Ying Li
Summary: This review summarizes the application of surface complexation modeling in fitting uranium adsorption, providing beneficial guidelines for predicting the transport and fate of uranium in geologic environments.
ENVIRONMENTAL POLLUTION
(2021)
Article
Chemistry, Physical
Magdalena Teresa Spicher, Sebastian Patrick Schwaminger, Daniela von der Haar-Leistl, Marco Reindl, Friedrich Ernst Wagner, Sonja Berensmeier
Summary: This study demonstrates different binding mechanisms of two similar phosphate-binding agents and reveals the significant influence of the composition of the organic shell on the interaction between iron(oxyhydr)oxide nanoparticles and phosphate. The experiments show that, at low concentrations, phosphate is bound through complexation reactions, while at high concentrations, iron phosphate species are formed. The ligands in the shell play a crucial role in the binding mechanism.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Engineering, Environmental
Guohua Li, Xianjin Qi, Jiahao Shi, Guizhi Yan, Heng Wang, Aimin Zhang
Summary: Arsenic pollution is a serious global problem that poses a threat to human and environmental health. Fe3O4 has been found to effectively remove arsenic from wastewater at high temperatures through a combination of physical adsorption and chemical precipitation.
ENVIRONMENTAL SCIENCE-WATER RESEARCH & TECHNOLOGY
(2022)
Article
Engineering, Environmental
Lei Chen, Zhichao Yang, Jieshu Qian, Bingcai Pan
Summary: Extensive efforts have been made to understand the mechanistic details of various heterogeneous Fenton reactions. However, controversy still remains regarding the oxidation mechanism of different organic compounds in the classical iron oxide-based Fenton reaction due to the lack of consideration for the interaction between the organic compounds and the catalyst. This study investigated the interaction between ferrihydrite (Fhy) catalyst and different organic compounds, and found that the oxidation pathway and mechanism of the target compounds are largely influenced by this interaction.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Chemistry, Physical
Omar Falyouna, Mohd Faizul Idham, Ibrahim Maamoun, Khaoula Bensaida, Upm Ashik, Yuji Sugihara, Osama Eljamal
Summary: Water contamination by ciprofloxacin is a global concern due to its contribution to antimicrobial resistance. This study demonstrates that the presence of oxalate can enhance the removal efficiency of ciprofloxacin by iron nanoparticles, and explores various factors affecting the removal process.
JOURNAL OF MOLECULAR LIQUIDS
(2022)
Article
Engineering, Environmental
Anshuman Satpathy, Jeffrey G. Catalano, Daniel E. Giammar
Summary: Adsorption and reduction of U(VI) on Fe(II)-bearing clay minerals can control uranium mobility in subsurface environments. The reduction of U(VI) was nearly complete at low sodium concentrations and both pH 3 and 6. At pH 6 and high sodium concentrations, U(VI) reduction was only 70%. Surface-bound U(VI) on unreduced montmorillonite was more easily extracted into solution with bicarbonate than surface-bound U(IV) generated by reduction. A nonelectrostatic surface complexation model was developed to interpret the equilibrium adsorption of U(IV) on Fe(II)-bearing montmorillonite as a function of pH and sodium concentration.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Geochemistry & Geophysics
Pengyuan Gao, Daming Zhang, Qiang Jin, Zongyuan Chen, Dongqi Wang, Zhijun Guo, Wangsuo Wu
Summary: This study successfully established the adsorption mechanism of Am(III) on bentonite through DFT calculations and surface complexation modeling. The results showed that the SCM considering cation exchange reactions and surface complex formation, while DFT calculations revealed the bidentate structure of surface complexes.
Article
Chemistry, Physical
Yangyang Zhang, Jeremy B. Fein, Yilian Li, Qiang Yu, Bo Zu, Chunli Zheng
Summary: The study demonstrated that LHA-coated Fe3O4 nanoparticles exhibit pH-dependent U(VI) adsorption and follow the pseudo-second-order kinetic model, with good recoverability for adsorption. The adsorption mechanism involves both Fe surface sites and oxygen-containing groups, with binding onto carboxyl sites dominating at the highest extents of LHA coating.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Engineering, Chemical
Ning Zhao, Qiyi Ma, Yanfu Wei, Shun Wang, Xuemin Zhong, Guanzheng Zhuang, Peng Yuan
Summary: In this study, a novel method for loading aggregation-prone Co3O4 onto sepiolite was proposed to enhance tetracycline adsorption. The highly dispersed Co3O4 was successfully anchored on the sepiolite grooves via Si-OH, as confirmed by XRD, TEM, and FTIR analyses. The Co3O4-Sep composite exhibited an ultra-high sorption capacity for tetracycline and retained its adsorption capacity even in the presence of competing ions and under strongly acidic or alkaline conditions.
SEPARATION AND PURIFICATION TECHNOLOGY
(2023)
Article
Ecology
Danielle VanMensel, Subba Rao Chaganti, Ryan Boudens, Thomas Reid, Jan Ciborowski, Christopher Weisener
Review
Chemistry, Physical
Christopher G. Weisener, Thomas Reid
SURFACE AND INTERFACE ANALYSIS
(2017)
Article
Geochemistry & Geophysics
Nicholas Falk, Subba Rao Chaganti, Christopher G. Weisener
GEOCHIMICA ET COSMOCHIMICA ACTA
(2018)
Article
Engineering, Environmental
Thomas Reid, Subba Rao Chaganti, Ian G. Droppo, Christopher G. Weisener
Article
Environmental Sciences
S. F. Colborne, T. J. Maguire, B. Mayer, M. Nightingale, G. E. Enns, A. T. Fisk, K. G. Drouillard, M. N. Mohamed, C. G. Weisener, C. Wellen, S. O. C. Mundle
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Environmental Sciences
Thomas Reid, Ian G. Droppo, Subba Rao Chaganti, Christopher G. Weisener
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Environmental Sciences
Magali Moreau, John Hadfield, John Hughey, Fiona Sanders, Dan J. Lapworth, Debbie White, Wayne Civil
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Microbiology
Danielle VanMensel, Subba Rao Chaganti, Ian G. Droppo, Christopher G. Weisener
ENVIRONMENTAL MICROBIOLOGY
(2020)
Article
Environmental Sciences
N. Falk, T. Reid, A. Skoyles, A. Grgicak-Mannion, K. Drouillard, C. G. Weisener
SCIENCE OF THE TOTAL ENVIRONMENT
(2019)
Article
Engineering, Environmental
T. Reid, I. G. Droppo, C. G. Weisener
Article
Agricultural Engineering
Xuejiao Huang, Christopher G. Weisener, Jiupai Ni, Binghui He, Deti Xie, Zhenlun Li
BIORESOURCE TECHNOLOGY
(2020)
Article
Engineering, Environmental
Adam Skoyles, Subba Rao Chaganti, Scott O. C. Mundle, Chris G. Weisener
WATER SCIENCE AND TECHNOLOGY
(2020)
Article
Environmental Sciences
Alicia M. DiCarlo, Chris. G. Weisener, Ken. G. Drouillard
BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY
(2020)
Article
Geosciences, Multidisciplinary
Sara C. Butler, James Pope, Subba Rao Chaganti, Daniel D. Heath, Christopher G. Weisener
Article
Environmental Sciences
Christopher Weisener, Jumin Lee, Subba Rao Chaganti, Thomas Reid, Nick Falk, Ken Drouillard
Article
Geochemistry & Geophysics
Zhen-Min Ge, Xiao-Long Huang, Wei Xie, Tobias W. Hofig, Fan Yang, Yang Yu, S. Khogenkumar Singh
Summary: The mantle source composition of the nascent oceanic crust in the central part of the Gulf of California has been investigated using basaltic glass samples. These samples show trace element patterns similar to enriched mid-ocean ridge basalts, suggesting that the nascent oceanic crust in the Guaymas Basin might be generated through partial melting of a depleted mantle source metasomatized by subducted slab materials.
Article
Geochemistry & Geophysics
Jean-Michel Brazier, Katja E. Goetschl, Martin Dietzel, Vasileios Mavromatis
Summary: This study estimated the distribution coefficient of Zn2+ between calcite/aragonite and reactive fluids and found that the growth rate strongly influences D-Zn(2+) in both minerals. Additionally, a linear correlation was found between D-Zn(2+) and the saturation degree of the reactive fluid.
Article
Geochemistry & Geophysics
Ming Lei, Michele Lustrino, Jifeng Xu, Zhiqiang Kang, Zhengfu Guo, Jianlin Chen
Summary: This study presents a comprehensive geochronological, mineralogical, and geochemical analysis of olivine leucitites in the Maiga area of southern Tibet, suggesting that these rocks originate from a carbonated peridotite mantle source and highlighting the possibility of carbonates being recycled deep into the mantle during continental subduction.
Article
Geochemistry & Geophysics
Yuntao Ye, Xiaomei Wang, Huajian Wang, Haifeng Fan, Zhigang Chen, Qingjun Guo, Ziteng Wang, Chaodong Wu, Donald E. Canfield, Shuichang Zhang
Summary: Phosphorus is an essential element for life and its cycle in the ocean is closely connected with the carbon and oxygen cycles. The study of phosphate oxygen isotopes can provide insights into various reactions related to phosphorus. By analyzing carbonate fluorapatite samples from the Mesoproterozoic Era in North China, it was found that the oxygen isotope values were lower compared to modern samples, indicating a warmer climate during that time period and a potential reason for the scarcity of phosphorite.
Article
Geochemistry & Geophysics
Vincent Busigny, Oanez Lebeau, Didier Jezeduel, Carine Chaduteau, Sean Crowe, Magali Ader
Summary: This study conducted high-precision Mo isotope research on hydrothermal metal sulfides from a porphyry copper deposit in Southwest China and found that different stages of mineralization have distinct Mo isotope compositions, providing valuable insights into the behavior of Mo isotopes in magmatic-hydrothermal systems.
Article
Geochemistry & Geophysics
Min Ji, Xiao-Ying Gao, Yong-Fei Zheng, Bing Gong
Summary: The study examines the anatectic mechanisms in the Himalayan orogen, finding that pressure and temperature control the reaction, while water content mainly affects the solid-phase composition. Dehydration and hydration melting likely occur at different depths in the crust. This research provides important insights into the melting processes in collisional orogens.