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Arsenic removal from alkaline leaching solution using Fe (III) precipitation
Wang, Yongliang1; Lv, Cuicui1,2; Xiao, Li1,2; Fu, Guoyan1,2; Liu, Ya1,2; Ye, Shufeng1; Chen, Yunfa1
2019-06-07
Source PublicationENVIRONMENTAL TECHNOLOGY
ISSN0959-3330
Volume40Issue:13Pages:1714-1720
Abstract

The alkaline leaching solution from arsenic-containing gold concentrate contains a large amount of arsenate ions, which should be removed because it is harmful to the production process and to the environment. In this study, conventional Fe (III) precipitation was used to remove arsenic from the leaching solution. The precipitation reaction was carried out at the normal temperature, and the effects of pH value and Fe/As ratio on the arsenic removal were investigated. The results show that the removal rate of arsenic is distinctive at different pH values, and the effect is best within the pH range of 5.25-5.96. The removal rate can be further increased by increasing the ratio of Fe/As. When the pH = 5.25-5.96 and Fe/As > 1.8, the arsenic in the solution can be reduced to below 5 mg/L. However, the crystallinity of ferric arsenate is poor, and the particle size is small, most of which is about 1 mu m. The leaching toxicity test shows the leaching toxicity of precipitates gradually decreased by the increase of Fe/As. The precipitates can be stored safely as the ratio of Fe/As exceeded 2.5.

KeywordArsenic Precipitates Ferric Arsenate Fe As Ratio Leaching Toxicity
DOI10.1080/09593330.2018.1429495
Language英语
WOS KeywordCrystalline Scorodite ; Aqueous-solutions ; Water ; Coagulation ; Stability
Funding ProjectKey Projects in the National Science & Technology Pillar Program[2012BAB08B04] ; National High Technology Research and Development Program of China[2011AA06A104]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Funding OrganizationKey Projects in the National Science & Technology Pillar Program ; National High Technology Research and Development Program of China
WOS IDWOS:000466592300009
PublisherTAYLOR & FRANCIS LTD
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Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28165
Collection中国科学院过程工程研究所
Corresponding AuthorWang, Yongliang; Ye, Shufeng
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Sch Chem & Chem Engn, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Wang, Yongliang,Lv, Cuicui,Xiao, Li,et al. Arsenic removal from alkaline leaching solution using Fe (III) precipitation[J]. ENVIRONMENTAL TECHNOLOGY,2019,40(13):1714-1720.
APA Wang, Yongliang.,Lv, Cuicui.,Xiao, Li.,Fu, Guoyan.,Liu, Ya.,...&Chen, Yunfa.(2019).Arsenic removal from alkaline leaching solution using Fe (III) precipitation.ENVIRONMENTAL TECHNOLOGY,40(13),1714-1720.
MLA Wang, Yongliang,et al."Arsenic removal from alkaline leaching solution using Fe (III) precipitation".ENVIRONMENTAL TECHNOLOGY 40.13(2019):1714-1720.
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