Article
Environmental Sciences
Yu Huang, Jiewen Yang
Summary: The presence of gallic acid (GA) was found to significantly promote the transformation of SMX by birnessite, especially at pH 6.0 compared to pH 4.0. The promotive effect was attributed to the addition reactions between SMX and GA quinones, as well as condensation reactions between -COOH of quinones and -NH2 of SMX or its transformation products.
SCIENCE OF THE TOTAL ENVIRONMENT
(2022)
Article
Engineering, Environmental
Peng Yang, Ke Wen, Kevin A. Beyer, Wenqian Xu, Qian Wang, Dong Ma, Juan Wu, Mengqiang Zhu
Summary: The presence of phosphate or silicate significantly decreases the rate and extent of reductive transformation of layered manganese oxides, likely due to the interference of oxyanions with electron transfer and structural rearrangements. Oxyanions also reduce the crystallinity and particle sizes of the transformation products, preventing further particle growth. This study enhances our understanding of how solution chemistry controls the redox-driven transformation of Mn oxides.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Chemistry, Physical
N. Tan Luong, Hanna Oderstad, Michael Holmboe, Jean-Francois Boily
Summary: Water films captured in the interlayer region of birnessite nanosheets have significant impacts in various fields. The temperature-dependent loadings and properties of these films are crucial in understanding birnessite reactivity. Our study shows that birnessite intercalates one water monolayer at lower temperatures, but the loading decreases at higher temperatures. The properties of intercalated water remain unchanged, indicating the intact hydrogen bonding network. Molecular simulations suggest that the reduced water storage capacity at high temperatures is a result of evolved heat and the larger mobility of water compared to K+ ions that are bound to birnessite basal oxygens. This study sheds light on the temperature-driven intercalation of water in nanolayered minerals and provides insights for future research.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Wei Cheng, Jerry Lindholm, Michael Holmboe, N. Tan Luong, Andrey Shchukarev, Eugene S. Ilton, Khalil Hanna, Jean-Francois Boily
Summary: Birnessite is a layered MnO2 mineral capable of intercalating nanometric water films in its bulk, with the nanoscale hydration driven by molecular controls. Studies have shown that birnessite intercalates no more than one monolayer of water per interlayer when exposed to water vapor, forming an energetically favorable hydration state.
Article
Environmental Sciences
Lu Jiang, Pingxiao Wu, Yijing Xu, Yihao Li, Meiqing Chen, Zubair Ahmed, Nengwu Zhu
Summary: This study investigates the impact of ammonium ion (NH4+) on triclinic birnessite (TB) in the transformation of arsenite (As(III)). The presence of NH4+ significantly enhances the removal efficiency and oxidation rate of As(III) by TB. The improved oxidation state of Mn and the increase of oxygen vacancy due to the coexistence of NH4+ contribute to the advanced As(III) oxidation capacity of TB. The larger specific surface area of TB also enhances the oxidation capacity of As(III). This study provides a fundamental understanding of the behavior of TB with ammonium ion towards the transformation of As(III) in the environment.
ENVIRONMENTAL POLLUTION
(2022)
Article
Environmental Sciences
Juan Liu, Xudong Wei, Shixing Ren, Jianying Qi, Jielong Cao, Jin Wang, Yuebing Wan, Yanyi Liu, Min Zhao, Liang Wang, Tangfu Xiao
Summary: Thallium (Tl) and antimony (Sb) are toxic elements in the natural environment. The emerging pollution of Tl and Sb in water has become a global concern. However, there are limited technologies available for simultaneous removal of Tl and Sb from wastewater. In this study, a novel system was successfully developed using a MnFe2O4-biochar composite (MFBC) as an adsorbent and persulfate (PS) as an activator, which showed promising results for the simultaneous removal of Tl and Sb from wastewater.
ENVIRONMENTAL POLLUTION
(2022)
Article
Geochemistry & Geophysics
Xiangqin Wang, Yang Yang, Liang Tao, Mengchang He
Summary: Manganese oxides, such as pyrolusite and manganite, have high oxidation and sorption capacities, important for antimony migration and transformation. Sb(III) and Sb(V) showed different affinities towards the two Mn oxides, depending on pH and mineral characteristics. Acidic pH favored sorption of both Sb species, with gamma-MnOOH demonstrating higher capacity than beta-MnO2.
Article
Chemistry, Physical
Chenying Wang, Nicholas Smieszek, Vidhya Chakrapani
Summary: The research reveals that the properties of different interlayer cations and their coordinating water molecules strongly affect the band gap and electron affinity of birnessite, with the high electron affinity values enabling birnessite-type structures to spontaneously oxidize due to their band edges being well below the redox potential of most thermodynamically stable cations and water.
CHEMISTRY OF MATERIALS
(2021)
Article
Environmental Sciences
Qing Li, Yun He, Aijiang Yang, Xia Hu, Fang Liu, Jincheng Mu, Shixue Mei, Lin-Ping Yang
Summary: In this study, a manganese-oxidizing bacterium, Pseudomonas aeruginosa PA-1, was found to tolerate Sb(III) stress during Mn(II) oxidation, and the resulting biological manganese oxide (BMO) showed superior oxidation and adsorption of Sb(III) compared to Abiotic-MnOX. The adsorption experiments indicated that Sb(III) primarily adsorbed onto BMO through chemisorption and multilayer adsorption, with a maximum adsorption capacity of 143.15 mg center dot g(-1). The removal kinetic studies showed that BMO achieved a removal efficiency of 72.38-95.71% after 15 min, and up to 96.32-98.31% after 480 min, with first-order kinetic behavior observed in both fast (within 15 min) and slow (15 to 480 min) removal stages. The research also revealed the mechanisms of Sb(III) oxidation by BMO and the formation of Sb(V) through surface reactions.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2023)
Article
Environmental Sciences
Xiong Luo, Jiayi Guo, Yan Lan, Lijin An, Xiaoyan Zhang, Kaixiang Shi, Shixue Zheng, Mingshun Li
Summary: This study evaluated the potential of Comamonas testosteroni JL40 for the bioremediation of Sb-contaminated soil. The results showed that strain JL40 could reduce the Sb content in soil and mitigate its toxicity to plants and soil through oxidation and efflux mechanisms. The application of strain JL40 also improved rice production and maintained a high bacterial population in the soil environment. The findings provide guidance for bacterial remediation of Sb-contaminated soil.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Chemistry, Applied
Shuai Lan, Siyu Zhou, Qin Zhang, Yang Li, Yupeng Yan, Feng Liang, Guanjie Jiang, Zhangjie Qin
Summary: The study found that increasing Fe content and pH enhance the ability of complexes to remove As(III), while increasing As(III) concentration does not significantly affect the removal rate. Adsorption by hematite loading can promote As(III) removal on kaolin in different environments, providing a better method for arsenic pollution remediation.
ADSORPTION SCIENCE & TECHNOLOGY
(2021)
Article
Soil Science
Tongliang Wu, Cun Liu, Peixin Cui, Hongjing Zhang, Sainan Hu, Peng Zhang, Qin Xue, Yaodong Wang, Chenglong Feng, Marcelo Eduardo Alves, Matthew K. Tighe, Yujun Wang
Summary: This study examined the sorption and abiotic oxidation kinetics of Sb(III) in soils, revealing the transformation process of Sb species. Iron and manganese oxides were identified as key components associated with the adsorption-oxidation reactions of Sb in soils. A mechanistic kinetic model was developed to describe the adsorption-desorption and oxidation processes of Sb(III), providing new insights into the dynamics of Sb in soils.
Article
Multidisciplinary Sciences
Xing Jin, Jinxiang Fu, Pengfei Yu, Di Luo
Summary: A new filter material called MOFCC was introduced and characterized for its ability to treat high concentrations of manganese from aqueous solutions. The removal of Mn(II) was found to be over 95.51% during a 30-day filtration experiment, indicating that MOFCC can effectively adsorb and oxidize manganese without the need for a start-up period. The surface properties of MOFCC were analyzed, and its specific surface area and pore size were determined to be 38.76 m2 g-1 and 3-40 nm, respectively. MOFCC has great potential as a manganese removal filter material for water treatment plants.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
Zifang Chi, Shijie Ju, Xinyang Liu, Feiyang Sun, Yuhuan Zhu
Summary: By using graphene oxide (GO) as a carrier, graphene oxide supported sulfidated nano zero-valent iron (S-nZVI@GO) was successfully synthesized. S-nZVI@GO exhibited excellent performance in the removal of antimony (Sb), with high adsorption capacity and a high removal rate over a wide pH range. Moreover, S-nZVI@GO activated molecular oxygen in water to produce organic peroxides and hydroxide, oxidizing trivalent antimony (Sb(III)) to pentavalent antimony (Sb(V)) for further separation.
Article
Environmental Sciences
Chunming Hao, Ximeng Sun, Yingao Peng, Bing Xie, Kaikai He, Yantang Wang, Min Liu, Xing Fan
Summary: This study investigated the role of dissolved organic matter (DOM) in the mobilization of antimony (Sb) in shallow groundwater in the Xikuangshan mine. The results showed that DOM plays a key role in controlling the Sb migration, primarily through complexing agents, competitive adsorption, and photopromoted oxidation mechanisms. This research enhances our understanding of the Sb migration mechanism in oxic groundwater.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Engineering, Environmental
Nan Zhao, Feiran Chang, Boyuan Hao, Lian Yu, Jean Louis Morel, Jing Zhang
JOURNAL OF HAZARDOUS MATERIALS
(2019)
Article
Environmental Sciences
Gang Pan, Xiaojun Miao, Lei Bi, Honggang Zhang, Lei Wang, Lijing Wang, Zhibin Wang, Jun Chen, Jafar Ali, Minmin Pan, Jing Zhang, Bin Yue, Tao Lyu
Article
Chemistry, Physical
Hongbo Lu, Xueming Liu, Feng Liu, Zhengping Hao, Jing Zhang, Zhang Lin, Yvonne Barnett, Gang Pan
APPLIED CATALYSIS B-ENVIRONMENTAL
(2019)
Article
Engineering, Environmental
Weifang Zhang, Peixuan Zhang, Feng Liu, Weizhen Liu, Jing Zhang, Zhang Lin
CHEMICAL ENGINEERING JOURNAL
(2019)
Article
Environmental Sciences
Xuheng Li, Feng Liu, Weifang Zhang, Hongbo Lu, Jing Zhang
ENVIRONMENTAL POLLUTION
(2019)
Article
Chemistry, Physical
Weifang Zhang, Feng Liu, Yonggang Sun, Jing Zhang, Zhengping Hao
APPLIED CATALYSIS B-ENVIRONMENTAL
(2019)
Article
Chemistry, Physical
Qingwen Long, Feng Liu, Yanjie Yuan, Yuting Dai, Chunli Wang, Xuheng Li, Jing Zhang
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2020)
Article
Engineering, Environmental
Qianzhe Sun, Feng Liu, Yanjie Yuan, Weizhen Liu, Weifang Zhang, Jing Zhang, Zhang Lin
JOURNAL OF HAZARDOUS MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Sanja Novak, Jing Zhang, Emmanuel Kentzinger, Ulrich Ruecker, Giuseppe Portale, Niklas Jung, Ulrich Jonas, Jin S. Myung, Roland G. Winkler, Gerhard Gompper, Jan K. G. Dhont, Emmanuel Stiakakis
Article
Chemistry, Physical
Chunli Wang, Yunxiang Dai, Xiaoheng Fu, Hongbo Lu, Jing Zhang
Summary: A novel 2D-2D bentonite/g-C3N4 composite with a layer-layer cross structure and large surface area was successfully synthesized for the photocatalytic oxidation of arsenic in wastewater. The composite exhibited a significantly higher As(III) oxidation rate compared to pure g-C3N4, attributed to the enhanced specific surface area and suppressed electron-hole recombination. Additionally, the composite showed high photocatalytic oxidation efficiency over a wide pH range.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Chongchao Yao, Jiaxin Li, Zhihao Zhang, Chunli Gou, Zhongshen Zhang, Gang Pan, Jing Zhang
Summary: In this study, a novel core-shell ORR catalyst Co2N/CoP@PNCNTs was developed through a simple method, and it was demonstrated to exhibit excellent electrocatalytic activity and long-term stability in alkaline solution. Co2N/CoP@PNCNTs also showed superior electrochemical performance as an air cathode in Zn-air batteries, with high open circuit potential, maximum power density, specific capacity, and negligible voltage decay.
Article
Chemistry, Multidisciplinary
Jing Zhang, Zhang Lin, Chunli Wang, Xuelu Ma, Zhihao Zhang, Hai Xiao
Summary: This study reports the first discovery of stable bulk bassanite precipitated in solution, filling the gap in the calcium sulfate phase diagram. By precisely controlling water activity and using a polymer, bulk bassanite is formed instead of transforming into thermodynamically favorable gypsum. A new thermodynamic model of the non-classical crystallization process is proposed, and molecular dynamics simulation demonstrates the role of water molecules in initiating the assembly and growth of bassanite.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Chemistry, Physical
Xuheng Li, Xiang Li, Chunli Wang, Bo Wang
Summary: This study proposes a novel design of Cu(I) active sites based on metal-organic framework (MOF) to capture OH- produced via Fenton-like processes and re-coordinate oxidized Cu sites, aiming to achieve high catalytic activity and stability. The Cu(I)-MOF exhibits excellent removal efficiency for sulfamethoxazole (SMX), with a high removal kinetic constant of 7.146 min-1. Through combining DFT calculations with experimental observations, it is revealed that the Cu of Cu(I)-MOF exhibits a lower d-band center, enabling efficient activation of H2O2 and spontaneous capturing of OH- to form Cu-MOF, which can be reorganized into Cu(I)-MOF through molecular regulation for recycle. This research demonstrates a promising Fenton-like approach for solving the trade-off between catalytic activity and stability and provides new insights into the design and synthesis of efficient MOF-based catalysts for water treatment.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Chunli Wang, Zhihao Zhang, Xiaoheng Fu, Jing Zhang, Jan K. G. Dhont
Summary: The study quantitatively determined the content of interfacial and bulk water in the parental microemulsions using FTIR spectroscopy, and investigated the nucleation and growth of PbCrO4 nanoparticles in the microemulsions. By controlling the water ratio in micellar droplets, the researchers were able to obtain amorphous nanoparticles in the interfacial water and nanocrystals in the bulk water. The amorphous nanoparticles with defined shapes were found to be stable in the microemulsion solution and did not transform into crystallites for several days, offering a method to control the metastable amorphous precursor for follow-up crystallization.
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2021)
