CAS OpenIR
Removal of cyanide adsorbed on pyrite by H2O2 oxidation under alkaline conditions
Tu, Yubo1,2; Han, Peiwei1; Wei, Lianqi1; Zhang, Xiaomeng1; Yu, Bo1,2; Qian, Peng1; Ye, Shufeng1
2019-04-01
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES-CHINA
ISSN1001-0742
Volume78Pages:287-292
AbstractLarge amounts of cyanide tailings are produced during the cyanidation process in gold extraction, which are hazardous solid wastes due to the toxic cyanide. Pyrite is one of the main minerals in cyanide tailings. The removal of cyanide adsorbed on pyrite by H2O2 oxidation under alkaline conditions was investigated in this study. It was found that the removal efficiency was positively correlated with pH from 5 to 12, but remained almost constant when pH was higher than 12. The highest cyanide removal efficiency of 91.10% was achieved by adding no less than 0.6 wt.% of H2O2. Cyanide removal was positively correlated with the CN-adsorption amount between 1.06 and 8.5 mg/g, and temperature between 25 and 85 degrees C. The removal of cyanide adsorbed on pyrite by H2O2 oxidation under alkaline conditions was due to the oxidation of pyrite. Hexacyanoferrate, thiocyanate and sulfate were generated with mole ratios of about 2.03: 1.12: 3.17 during the cyanide removal. (c) 2018 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
KeywordCyanide removal Pyrite H2O2 oxidation Alkaline conditions
DOI10.1016/j.jes.2018.10.013
Language英语
WOS KeywordXANTHATE ; OXYGEN
Funding ProjectNational Key Research and Development Program of China[2017YFC0703200]
WOS Research AreaEnvironmental Sciences & Ecology
WOS SubjectEnvironmental Sciences
Funding OrganizationNational Key Research and Development Program of China
WOS IDWOS:000463377700027
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/28266
Collection中国科学院过程工程研究所
Corresponding AuthorYe, Shufeng
Affiliation1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Tu, Yubo,Han, Peiwei,Wei, Lianqi,et al. Removal of cyanide adsorbed on pyrite by H2O2 oxidation under alkaline conditions[J]. JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,2019,78:287-292.
APA Tu, Yubo.,Han, Peiwei.,Wei, Lianqi.,Zhang, Xiaomeng.,Yu, Bo.,...&Ye, Shufeng.(2019).Removal of cyanide adsorbed on pyrite by H2O2 oxidation under alkaline conditions.JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA,78,287-292.
MLA Tu, Yubo,et al."Removal of cyanide adsorbed on pyrite by H2O2 oxidation under alkaline conditions".JOURNAL OF ENVIRONMENTAL SCIENCES-CHINA 78(2019):287-292.
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