Article
Geochemistry & Geophysics
I. T. Burke, R. Courtney, W. M. Mayes
Summary: Careful management is required for the high-volume, fine grained tailings from Pb/Zn ore processing. The presence of metalloid elements As and Sb in tailings and leachates can cause regulatory concern due to their toxicity and bioaccumulation potential. The mobility of As and Sb in tailings is controlled by their chemical speciation and associations with mineral phases. By establishing a vegetation cover and promoting oxidation of the tailings, beneficial vegetation cover and a suitable soil-like surface layer can be developed.
APPLIED GEOCHEMISTRY
(2023)
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
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
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
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
Geochemistry & Geophysics
Avishek Rudra, Elizabeth Cottrell, Marc M. Hirschmann
Summary: This study investigated the partitioning of Fe3+ between pyroxene and melt under controlled oxygen fugacity conditions, revealing variations in Fe3+ content in different types of pyroxenes at different f(o2) levels. XANES measurements showed that Fe3+/Fe-T values in pyroxene crystals produced in the experiments were lower compared to natural peridotitic pyroxenes, potentially due to lower Al-3(+) contents. Thermodynamic models were found to over-predict the stability of Fe3+ in pyroxenes, leading to underestimation of f(o2) in spinel peridotites during basalt genesis.
Article
Chemistry, Physical
Yao-Jen Tu, Shan-Li Wang, Ying-Rui Lu, Ting-Shan Chan, Cliff T. Johnston
Summary: This study synthesized six kinds of magnetic nanoferrites to investigate their ability in removing Sb(III) and Sb(V) from aquatic systems. The results showed that ZnFe2O4 had great potential to adsorb and oxidize Sb(III) in aqueous solutions, providing essential information for designing a rapid and effective Sb removal technique.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Multidisciplinary
Jose Manuel Flores-Alvarez, Diego Cortes-Arriagada, Zeferino Gomez-Sandoval, Gururaj Kudur Jayaprakash, Silvia Guillermina Ceballos-Magana, Roberto Muniz-Valencia, Jaime Cristobal Rojas-Montes, Kayim Pineda-Urbina
Summary: A novel type of carbon paste electrode modified with mercaptobenzothiazole disulfide showed high selectivity and sensitivity towards copper, and was reliable for detecting Cu2+ in different types of waters.
NEW JOURNAL OF CHEMISTRY
(2022)
Article
Chemistry, Physical
Andrea M. Lucero Manzano, Esteban D. Cantero, Esteban A. Sanchez, Oscar Grizzi
Summary: This study investigates the deposition of antimony on TiO2(1 0 0), ranging from sub-monolayer to over 20 equivalent monolayers. Various characterization techniques were used to analyze the growth kinetics, reaction path, and temperature dependence. The results suggest that the antimony remains on the surface without significant incorporation into the bulk, forming flat islands.
APPLIED SURFACE SCIENCE
(2022)
Article
Geochemistry & Geophysics
Colin Ferrari, Eleonore Resongles, Marina Hery, Angelique Desoeuvre, Remi Freydier, Sophie Delpoux, Odile Bruneel, Corinne Casiot
Summary: The oxidation of antimonite to antimonate plays a crucial role in controlling the mobility of antimony in aquatic systems. This study investigates the fractionation of antimony isotopes during the oxidation process under mining-relevant concentrations. The results show that the fractionation of antimony isotopes is influenced by experimental conditions and reaction pathways. While antimony isotopes have the potential to serve as process tracers in water, further research and comparison with natural systems are needed.
Review
Environmental Sciences
Mengsi Cheng, Ying Fang, Haipu Li, Zhaoguang Yang
Summary: This review summarizes the classification and performance characteristics of adsorbents used for removing antimony pollutants from water in the past two decades, focusing on the adsorption behavior and mechanisms of various adsorbents for antimony.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Qi Xu, Chenxi Guo, Beibei Li, Zedong Zhang, Yajun Qiu, Shubo Tian, Lirong Zheng, Lin Gu, Wensheng Yan, Dingsheng Wang, Jian Zhang
Summary: In this study, a doping strategy using Al3+ was successfully employed to construct single-atom Cu on MgO nanosheets (Cu-1/MgO(Al)) for promoting the free-radical hydrophosphinylation of alkenes. The Cu-1/MgO(Al) catalyst exhibited superior activity, durability, and anti-Markovnikov selectivity compared to Cu/MgO catalyst without Al3+ doping.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Environmental Sciences
Yuanxia Li, Nali Zhu, Xujun Liang, Lirong Zheng, Chenxi Zhang, Yu-Feng Li, Zhiyong Zhang, Yuxi Gao, Jiating Zhao
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
(2020)
Article
Engineering, Environmental
Kai Lei, Chun-Ye Lin, Ying Zhu, Wei Chen, Hui-Yun Pan, Zhe Sun, Andrew Sweetman, Qinghua Zhang, Meng-Chang He
JOURNAL OF HAZARDOUS MATERIALS
(2020)
Article
Engineering, Environmental
Yidi Wang, Wei Ouyang, Chunye Lin, Weihong Zhu, Andrea Critto, Mats Tysklind, Xuelei Wang, Mengchang He, Baodong Wang, Haotian Wu
Summary: The study reveals deep uncertainty in estimating sediment pollutant flux in river delta-front estuaries, with fine particles in rivers controlling pollution status in estuaries. The Yellow River's high-silt sediment load, significant in global fluvial sediment transport, shows a negative correlation with estuarine phosphorus flux.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2021)
Article
Environmental Sciences
Qianyun Zhong, Lianzhen Li, Mengchang He, Wei Ouyang, Chunye Lin, Xitao Liu
Summary: Laboratory experiments were conducted to investigate the toxicity of antimony (Sb) to earthworms in four different agricultural soils. The earthworms clearly avoided the Sb spiked soils, and the avoidance response was correlated to the exposure dose. Different toxic effects of Sb were observed in the four types of soils, with antimony being more toxic in sandy alkaline soil. The study provided comprehensive data on the toxicological effects of Sb in agricultural soil, which can contribute to ecological risk assessments.
ENVIRONMENTAL POLLUTION
(2021)
Article
Environmental Sciences
Tianning Wang, Yonghong Jiao, Mengchang He, Wei Ouyang, Chunye Lin, Xitao Liu, Haijiao Xie
Summary: This study prepared a porous Fe-Cu-chitosan composite through one-step coprecipitation and found the optimal Fe/Cu proportion for antimony adsorption. Spectral characterization, batch experiments, and density functional theory simulations were conducted to determine the adsorption mechanism involving Fe-Cu coupling and surface hydroxyls.
ENVIRONMENTAL POLLUTION
(2022)
Article
Multidisciplinary Sciences
Shanlin Li, Ruguang Ma, Jingcong Hu, Zichuang Li, Lijia Liu, Xunlu Wang, Yue Lu, George E. Sterbinsky, Shuhu Liu, Lei Zheng, Jie Liu, Danmin Liu, Jiacheng Wang
Summary: To achieve a zero-carbon economy, advanced anode catalysts are needed for hydrogen production and biomass upgrading using renewable energy. This study focuses on the electrochemical oxidation of nickel-metalloids to create oxyanion-coordinated amorphous nickel oxyhydroxides. The results show that substitution with phosphorus enhances the electrooxidation activity of methanol.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Environmental
Jianbing Wang, Jiyong Liu, Xianjia Peng, Mengchang He, Xingyun Hu, Jinmin Zhao, Feng Zhu, Xin Yang, Linghao Kong
Summary: This study proposes a UV/sulfite advanced reduction method for removing arsenic (As(V) and As(III)) from water. The results show that this method can effectively remove over 99.9% of arsenic and avoid the generation of hazardous waste. The reduction of arsenic is favorable under alkaline conditions, while the presence of dissolved oxygen and some other substances inhibits the reduction process.
Article
Engineering, Environmental
Tianning Wang, Yonghong Jiao, Mengchang He, Xianjia Peng, Peng Liu, Wei Ouyang, Chunye Lin, Xitao Liu, Haijiao Xie
Summary: In this study, a novel adsorbent was prepared by a one-step hydrothermal method for efficient removal of aqueous antimony. The composite material showed excellent adsorption capacity for Sb(III) and Sb(V), and XAS and DFT analysis revealed that the Fe-Mn-CS interface structure had the highest adsorption energy for antimony.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Environmental Sciences
Huiji Liu, Wei Zeng, Mengchang He, Chunye Lin, Wei Ouyang, Xitao Liu
Summary: This study analyzed the occurrence, distribution, migration, and influencing factors of antimony (Sb) in the Zijiang River. The study found that mining and smelting were the main sources of Sb in the river. The concentration of Sb showed a decreasing trend from the tributaries to the mainstream, and the retention and accumulation of sediments led to the secondary release of Sb.
ENVIRONMENTAL POLLUTION
(2023)
Article
Environmental Sciences
Huiji Liu, Chanjuan Kang, Jun Xie, Mengchang He, Wei Zeng, Chunye Lin, Wei Ouyang, Xitao Liu
Summary: This study conducted a comprehensive investigation on the contamination and ecological and health risks of arsenic in the Zijiang River, finding relatively high concentrations of arsenic in the midstream area. The release of arsenic should be given more consideration for secondary risk. Although the overall risk of arsenic in surface waters was low, children had higher health risks compared to adults.
ENVIRONMENT INTERNATIONAL
(2023)
Article
Engineering, Environmental
Feng Zhu, Linghao Kong, Mengchang He, Duxian Fang, Xingyun Hu, Xianjia Peng
Summary: In alkaline wastewater with high arsenic concentration, traditional lime precipitation generates large amounts of hazardous waste. In this study, a heat-activated reduction method using thiourea dioxide (TDO) was proposed to efficiently remove and recover arsenic from alkaline wastewater. More than 99.9% of As(III)/As(V) were reduced to As(0) with a purity of more than 99.5 wt% by TDO within 30 min. The highly reductive eaq -and SO2• radicals generated during TDO decomposition significantly contributed to the arsenic reduction. Increasing pH and temperature improved the arsenic reduction by accelerating the formation of eaq -and SO2• radicals. Dissolved oxygen had a negative effect on arsenic removal, while CO32- slightly suppressed the removal effect. SiO32-, PO43-, Cl-, SO42-, and NH4+ had negligible effects. This method has potential for efficient arsenic removal and reduction in alkaline wastewater.
Article
Engineering, Environmental
Yiqing Wang, Linghao Kong, Mengchang He, Chunye Lin, Wei Ouyang, Xitao Liu, Xianjia Peng
Summary: Sole O2 or H2O2 oxidants are insufficient for oxidizing Sb(III) over a time scale of hours to days, but Sb(III) oxidation can occur during Fe(II) oxidation by O2 and H2O2 due to the generation of reactive oxygen species (ROS). However, the mechanisms and effects of organic ligands on the co-oxidation of Sb(III) and Fe(II) require further investigation. This study provides detailed insights into the co-oxidation of Sb(III) and Fe(II) by O2 and H2O2, highlighting the influence of pH, anions, and organic ligands on the oxidation processes. The results contribute to a better understanding of the geochemical cycling and fate of Sb in subsurface environments and have implications for the in-situ remediation of Sb(III)-contaminated sites using Fenton reactions.
Article
Environmental Sciences
Roberto Xavier Supe Tulcan, Wei Ouyang, Zewei Guo, Hao Xin, Chunye Lin, Jiamei Wang, Mengchang He
Summary: The concentrations and variations of vanadium in coastal areas are highly influenced by sediment flux and anthropogenic projects. Urban and industrial development has led to pollution of coastal sediments. Vanadium is of significant interest due to its distribution, concentrations, accumulation, and risks, especially in bays with industrial development and high population.
Article
Environmental Sciences
Aihua Wang, Shujun Liu, Jun Xie, Wei Ouyang, Mengchang He, Chunye Lin, Xitao Liu
Summary: Mining, smelting, and tailing deposition activities can cause metalloid contamination in soils, posing a threat to ecosystems and human health. Microbial indicators play a crucial role in assessing soil ecological risks due to their sensitivity to environmental factors. This study focused on Xikuangshan, the largest active antimony mine in the world, and investigated soil properties, metalloid contents, and microbial characteristics. The results showed that the soils were mainly polluted by antimony, followed by cadmium and arsenic. Microbial characteristics varied among different sampling points in the mining area. The findings provide a theoretical basis for ecological risk assessment of contaminated soils.
JOURNAL OF ENVIRONMENTAL SCIENCES
(2023)
Article
Spectroscopy
Chen Hong-rui, Zhang Duo-rui, Nie Zhen-yuan, Zheng Lei, Zhang Li-li, Yang Hong-ying, Xia Jin-lan
SPECTROSCOPY AND SPECTRAL ANALYSIS
(2020)
