Article
Engineering, Environmental
Yongkui Li, Xianjin Qi, Guohua Li, Hua Wang
Summary: A new strategy using pyrite as an in situ S and Fe source was proposed for treating high arsenic wastewaters, successfully removing and immobilizing up to 99.4% of arsenic from copper smelting wastewaters. This process demonstrates the potential for efficient and affordable disposal of wastewater, showing promising results for arsenic removal and immobilization.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Engineering, Chemical
Zanlang Tang, Xincun Tang, Haonan Liu, Zeyu Xiao
Summary: In this study, a clean process for recovering antimony and synthesizing scorodite was proposed, which can efficiently separate valuable antimony from toxic arsenic and mitigate arsenic pollution caused by the metallurgical process of nonferrous metals.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Environmental
Weifang Zhang, Hongbo Lu, Feng Liu, Chunli Wang, Zhihao Zhang, Jing Zhang
Summary: A novel hydrothermal treatment method with Fe(NO3)(3) was developed to detoxify arsenic sulfide slag (ASS) by transforming arsenic into scorodite and extracting sulfur in one step. The process significantly reduced the leachability of arsenic-containing solid waste and increased the stability of the arsenic contained solid product.
JOURNAL OF HAZARDOUS MATERIALS
(2021)
Article
Engineering, Environmental
Rui Su, Xu Ma, Xiuling Yin, Xiaoming Zhao, Zelong Yan, Jinru Lin, Xiangfeng Zeng, Danni Zhang, Shaofeng Wang, Yongfeng Jia
Summary: The high concentration of arsenic in waste sulfuric acid must be removed and immobilized to protect the environment. The proposed method of precipitating arsenic as scorodite using siderite as an iron source is economical and efficient. The three-step process can achieve a high removal efficiency of arsenic from the waste sulfuric acid and produce a stable solid residue.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Green & Sustainable Science & Technology
Guangya Zheng, Jupei Xia, Hailang Liu, Zhengjie Chen
Summary: This study focused on the multi-metal extraction of flue dust from copper smelting, conducting thermodynamic analysis to identify ferric arsenate deposits and various forms of copper and zinc arsenate in acid leaching solution. Single factor experiments were used to verify the research findings, showing that controlling the pH value of the reaction system can effectively separate arsenic from copper and zinc.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Environmental Sciences
Yongkui Li, Xianjin Qi, Guohua Li, Xiaoxu Duan, Nina Yang
Summary: This study proposes an environmentally friendly process for the removal and fixation of high-arsenic wastewater using lead-zinc smelting slag. The slag is dissolved in the wastewater, releasing iron and calcium ions, and increasing the pH value to facilitate arsenic precipitation. The results show that under suitable conditions, a high percentage of arsenic can be effectively precipitated from the wastewater, meeting the standards for wastewater discharge.
Article
Environmental Sciences
Xu Ma, Jiaxi Zhang, Mario A. Gomez, Yu Ding, Shuhua Yao, Hongtao Lv, Xin Wang, Shaofeng Wang, Yongfeng Jia
Summary: The coprecipitation and aging of Fe(III)-As(III)-As(V)-SO4(2-) in acidic systems play a crucial role in controlling arsenic behavior. The study investigates the redistribution and transformation of arsenic in the system at different Fe/As molar ratios and pH values. Results show that As(III) contents in the solid products change with aging time and conditions, indicating the complex behavior of arsenic in the system.
SCIENCE OF THE TOTAL ENVIRONMENT
(2021)
Article
Geochemistry & Geophysics
Jacklin Jeke Nilling, Akshat Verma, Abhas Singh
Summary: This study provides a detailed geochemical analysis of groundwater, revealing the influence of secondary precipitation on arsenic concentration and the presence of colloidal arsenic in groundwater. The findings suggest that solubility-driven secondary processes may play a significant role in the fate and transport of arsenic in shallow groundwaters.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2022)
Article
Engineering, Environmental
Jimei Zhou, Yizhang Liu, Hongling Bu, Peng Liu, Jing Sun, Fei Wu, Jian Hua, Chengshuai Liu
Summary: Scorodite can immobilize most of the arsenic in acidic arsenic-contaminated environments, but reductive dissolution of scorodite may occur during redox changes. This study investigated the transformation of scorodite induced by dissolved Fe(II) under anaerobic conditions and its effects on arsenic behavior. The results showed that the formation of parasymplesite and ferrihydrite-like species during scorodite transformation was controlled by Fe(II)aq concentrations. The newly formed species immobilized dissolved As(V) through adsorption and incorporation. Additionally, As(V) reduction occurred during Fe(II)-induced scorodite transformation.
JOURNAL OF HAZARDOUS MATERIALS
(2022)
Article
Environmental Sciences
D. C. Paz-Gomez, S. M. Perez-Moreno, M. J. Gazquez, J. L. Guerrero, I Ruiz-Oria, G. Rios, J. P. Bolivar
Summary: Commercial copper is obtained through a hydro-pyrometallurgical process, where Cu anodes are enriched to Cu cathodes by electrorefining. However, impurities like arsenic accumulate in the electrolyte during this process, leading to decreased quality. A procedure was developed to fully dissolve electrolyte sludge (ES), removing arsenic and recovering copper content efficiently. The process involves optimizing dissolution, precipitation, and recovery steps to address the issue of arsenic accumulation in the industrial process.
Article
Green & Sustainable Science & Technology
Anna-Lisa Bachmann, Gert Homm, Anke Weidenkaff
Summary: In order to deposit arsenic residues from copper production in a stable way, the trivalent arsenic must first be oxidized to arsenic(V). A potentially cheaper method, electrochemical oxidation using a boron-doped diamond electrode, is investigated as a novel alternative for large-scale arsenic oxidation. The presence of interfering ions during oxidation and the precipitation of electrochemically oxidized arsenic(V) as scorodite are addressed in this paper. Additionally, an economic analysis compares the financial benefit of oxidation via BDD electrodes to hydrogen peroxide.
Article
Chemistry, Physical
Pan Chen, Yuxin Zhao, Jun Yao, Jianyu Zhu, Jian Cao
Summary: This study demonstrated the removal of acidic arsenic-containing wastewater from the non-ferrous metal smelting industry using lead slag as an iron source. The results showed a high removal efficiency of arsenic and a reduction in arsenic leaching toxicity.
Article
Metallurgy & Metallurgical Engineering
I. R. Boboev, F. S. Tabarov
Summary: This paper discusses the removal of arsenic scorodite from gold ore, presenting a method that involves sulphidization roasting to increase gold recovery and confirming its environmentally safe and efficient processing capability.
Article
Metallurgy & Metallurgical Engineering
Tao Zeng, Zhigan Deng, Fan Zhang, Gang Fan, Chang Wei, Xingbin Li, Minting Li, Huiyang Liu
Summary: The treatment process effectively removes As from dirty acid wastewater and allows for the recycling of valuable metals in Waelz slag, offering promise for industrial use.
Article
Green & Sustainable Science & Technology
Xuezhu Li, Guiyuan Cai, Yongkui Li, Xing Zhu, Xianjin Qi, Xin Zhang, Bo Shu, Kongzhai Li, Yonggang Wei, Hua Wang
Summary: Using limonite as an in situ solid iron source promotes the crystallization of scorodite for effective arsenic removal from high-arsenic smelting wastewater. This method can precipitate 99.6% of arsenic in the wastewater as environmentally stable scorodite, with the residual arsenic concentration in the filtrate further reduced to 0.1 μg/L through additional treatment with fresh limonite.
JOURNAL OF CLEANER PRODUCTION
(2021)
Article
Water Resources
G. Kerr, J. Pope, D. Trumm, D. Craw
MINE WATER AND THE ENVIRONMENT
(2015)
Article
Water Resources
Dave Craw, Jo Cavanagh, Joanna Druzbicka, Jon S. Harding, Gemma Kerr, James Pope, Dave Trumm
MINE WATER AND THE ENVIRONMENT
(2015)
Article
Water Resources
Dave Trumm, James Pope
MINE WATER AND THE ENVIRONMENT
(2015)
Article
Environmental Sciences
Z. A. DiLoreto, P. A. Weber, W. Olds, J. Pope, D. Trumm, S. R. Chaganti, D. D. Heath, C. G. Weisener
JOURNAL OF ENVIRONMENTAL MANAGEMENT
(2016)
Article
Geology
W. E. Olds, P. A. Weber, M. H. Pizey, J. Pope
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2016)
Article
Geology
Dave Craw, James Pope
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2017)
Article
Water Resources
Ivan Blanco, Devin J. Sapsford, Dave Trumm, James Pope, Natalie Kruse, Young-wook Cheong, Hamish McLauchlan, Eden Sinclair, Paul Weber, William Olds
MINE WATER AND THE ENVIRONMENT
(2018)
Article
Geology
J. Pope, H. Christenson, K. Gordon, N. Newman, D. Trumm
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2018)
Article
Geochemistry & Geophysics
Gemma Kerr, Dave Craw, Dave Trumm, James Pope
APPLIED GEOCHEMISTRY
(2018)
Article
Geology
Hannah Christenson, James Pope, Dave Trumm, Nigel Newman, Ivan Blanco, Gemma Kerr, Mike Young, Ben Uster
NEW ZEALAND JOURNAL OF GEOLOGY AND GEOPHYSICS
(2019)
Article
Water Resources
M. E. Fairgray, J. G. Webster-Brown, J. Pope
MINE WATER AND THE ENVIRONMENT
(2020)
Article
Water Resources
Carrie Jewiss, Dave Craw, James Pope, Hana Christenson, Dave Trumm
MINE WATER AND THE ENVIRONMENT
(2020)
Article
Water Resources
F. V. Eppink, D. Trumm, P. Weber, W. Olds, J. Pope, J. E. Cavanagh
MINE WATER AND THE ENVIRONMENT
(2020)
Article
Geosciences, Multidisciplinary
Sara C. Butler, James Pope, Subba Rao Chaganti, Daniel D. Heath, Christopher G. Weisener
Proceedings Paper
Engineering, Geological
J. Pope, A. Dutton, C. Nelson
PROCEEDINGS OF THE 24TH INTERNATIONAL MINING CONGRESS AND EXHIBITION OF TURKEY, IMCET 2015
(2015)