Article
Energy & Fuels
Yongqiang Chen, Vahid J. Niasar, Quan Xie
Summary: This study quantified the adhesion of the acid component (-COOH) on kaolinite surface using PHREEQC and PEST, revealing that PTBBA mainly adsorbs on the basal plane. This geochemical modeling corrected previous overestimations and provided a deeper understanding for predicting low salinity effects.
Article
Engineering, Environmental
Wanpeng Chen, Jiaming Xiong, Juchao Liu, Hainan Wang, Jinni Yao, Hongxia Liu, Xiaoliu Huangfu, Qiang He, Jun Ma, Caihong Liu, Yao Chen
Summary: The transformations of monovalent thallium (Tl) in an aqueous environment are significantly affected by Tl(I) partitioning at the solid-water interface during sorption. Two unified adsorption models, diffuse layer modeling and kinetics modeling, accurately predict the environmental fate of thallium by quantifying the kinetics of Tl (I) adsorption on heterogeneous adsorbents and the formation of multiple complexes under a wide range of water chemistry conditions. The characteristics of different Tl(I) complexes have influence on the adsorption and desorption processes.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Engineering, Chemical
Chiharu Tokoro, Tatsuya Kato
Summary: Resin-supported Fe(III) demonstrated high removal efficiency for As(V), with over 90% removed through surface precipitation as poorly crystalline ferric arsenate. pH 3 was found to be the optimal condition for As(V) removal.
ADVANCED POWDER TECHNOLOGY
(2021)
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
Engineering, Environmental
Hongbiao Wen, Zezhen Pan, Xingxing Wang, Kejian Li, Qihuang Wang, Jinming Luo, Hongbo Fu, Liwu Zhang, Zimeng Wang
Summary: Despite extensive research on semiconductor photocatalysis, the fundamental aquatic chemistry of these new materials and their environmental implications are poorly understood. In this study, the solubility of BiVO4 and its non-stoichiometric dissolution in different pH ranges were investigated. The solubility and stability of BiVO4 were found to be pH-dependent, with the lowest solubility and highest stability near pH 5. Illumination significantly enhanced the dissolution of BiVO4. Adsorption of dissolved bismuth by BiVO4 solids was identified as the main reason for the non-stoichiometric dissolution. These findings highlight the importance of considering the dissolution of photocatalysts and provide a method to evaluate the environmental stability and risks of other semiconductor materials.
JOURNAL OF HAZARDOUS MATERIALS
(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
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
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)
Article
Engineering, Environmental
Barbora Hudcova, Jeremy B. Fein, Daniel C. W. Tsang, Michael Komarek
Summary: This study quantified the sorption of Zn(II) and As(V) onto Mg-Fe LDH/BC composites and modeled their adsorption behavior. The results revealed that LDH is the main phase responsible for the removal of metal(loid)s from solution, while BC only contributes in systems with the most effective type of BC. Different adsorption mechanisms were observed at different concentrations, with inner-sphere surface complexation dominating at low concentrations and precipitation and formation of amorphous ferric arsenates contributing at higher concentrations. Increasing As(V) concentrations led to enhanced Mg leaching and destruction of the LDH structure. Overall, the study highlights the importance of comprehensive studies to optimize the behavior of novel composite materials in environmental technologies.
CHEMICAL ENGINEERING JOURNAL
(2022)
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
Chemistry, Multidisciplinary
Katsuto Onishi, Shunsuke Ohtani, Kenichi Kato, Shixin Fa, Yoko Sakata, Shigehisa Akine, Moe Ogasawara, Hitoshi Asakawa, Shusaku Nagano, Yoshinori Takashima, Motohiro Mizuno, Tomoki Ogoshi
Summary: In this study, a molecular glass that can be controlled in terms of state and water repellency by absorbing and releasing n-alkane guest vapors is reported.
Article
Geosciences, Multidisciplinary
Daniel Isong Otu Egbe, Ashkan Jahanbani Ghahfarokhi, Menad Nait Amar, Ole Torsaeter
Summary: Low-salinity waterflooding (LSWF) has been studied for its impact on ion exchange and wettability alteration in carbonate cores to improve oil recovery. The results show wettability alteration is crucial for the increased oil recovery during LSWF, with sensitivity analysis on key parameters performed for process optimization.
NATURAL RESOURCES RESEARCH
(2021)
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
Energy & Fuels
Motaz Saeed, Prashant Jadhawar, Subhash C. Ayirala, Rockey Abhishek, Yingfang Zhou
Summary: Low salinity waterflooding shows potential in increasing oil recovery compared to regular waterflooding. The interaction between crude oil-brine-rock (COBR) determines the wettability alteration during low salinity waterflooding. Triple-layer surface complexation modelling (TLM) is used to simulate the COBR interactions, while the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory characterizes the COBR stability. The maximum energy barrier (MEB) parameter is proposed as an indicator of reservoir wettability and is correlated with experimentally measured contact angles.
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
(2022)
Article
Engineering, Environmental
Xinyue Shen, Huiyan Zhu, Pei Wang, Lirong Zheng, Shiwen Hu, Chongxuan Liu
Summary: This study established a model for quantifying Cd species during phase transformation based on batch experiments and mechanistic insights, revealing the effects of Fe(II) concentrations on the formation of secondary Fe minerals and the distribution of Cd and FA. The results contribute to an in-depth understanding of the mobility of Cd in the environment and provide a method for quantifying the dynamic behavior of heavy metals in multi-reactant systems.
JOURNAL OF HAZARDOUS MATERIALS
(2022)