Eco-friendly and rapid extraction of gold by in-situ catalytic oxidation with N-bromosuccinimide
文献类型：期刊论文
| 作者 | Liu, Xiang1,2; Wang, Yongliang4; Xiao, Li1,2; Ma, Licheng1,3; Han, Peiwei1,3; Ye, Shufeng1,3 |
| 刊名 | HELIYON
 |
| 出版日期 | 2022-06-01 |
| 卷号 | 8期号:6页码:12 |
| 关键词 | Gold extraction In-situ autocatalysis Non-cyanide NBS Oxidative etching |
| DOI | 10.1016/j.heliyon.2022.e09706 |
| 英文摘要 | Gold is a valued, critical element whose chemical activation or extraction is challenging. Non-cyanide extraction of gold is now the focus, and N-bromosuccinimide(NBS) is attracting attention. Herein, new insights into the possible mechanism are deeply revealed through comprehensive analysis and detection of the reaction by using elementary gold and gold bearing ore. Experiments on gold foil indicate that Au can be activated in NBS solution to perform a satisfactory dissolution. Application of NBS in gold extraction from ore show a high yield of 86.24% under optimal conditions of NBS dosage 0.05 M, liquid-solid ratio 4:1, stirring speed 400 rpm, pH 8, 25 degrees C and leaching for 20 h, while yields of other coexisting metals are nearly negligible. The process leads to direct, efficient, one-pot conversion of gold, into simple water-soluble salts. Characterizations show that the framework of NBS are not destroyed, only bromine separates from the framework. The oxidation of neutral gold atom to trivalent Au-(III) occurs in a mild, clean and room-temperature chemistry, which converts gold to [AuBr4](-), and the framework to succinimide. The active bromine and radical Br (Br center dot) generated from in-situ autocatalysis of NBS are responsible for this. The systematic results herald a green procedure for preparation of gold derivatives and gold extraction industry. |
| WOS关键词 | LEACHING KINETICS ; THIOSULFATE ; DISSOLUTION ; THIOUREA ; CYANIDE ; RECOVERY ; COPPER ; BROMINATION ; SILVER ; ORES |
| 资助项目 | Innovation Academy for Green Manufacture, Chinese Academy of Sciences[IAGM-2019-A05] ; National Key RD Program[2019YFC1908405] |
| WOS研究方向 | Science & Technology - Other Topics |
| 语种 | 英语 |
| WOS记录号 | WOS:000830207200008 |
| 出版者 | ELSEVIER SCI LTD |
| 资助机构 | Innovation Academy for Green Manufacture, Chinese Academy of Sciences ; National Key RD Program |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/54290]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Wang, Yongliang; Ye, Shufeng |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, 1 North 2nd St,Zhongguancun,Haidian Dist, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Chem Engn, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Innovat Acad Green Manufacture, Beijing 100190, Peoples R China 4.CNNC, Beijing Res Inst Chem Engn & Met, Beijing 101149, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Xiang,Wang, Yongliang,Xiao, Li,et al. Eco-friendly and rapid extraction of gold by in-situ catalytic oxidation with N-bromosuccinimide[J]. HELIYON,2022,8(6):12. |
| APA | Liu, Xiang,Wang, Yongliang,Xiao, Li,Ma, Licheng,Han, Peiwei,&Ye, Shufeng.(2022).Eco-friendly and rapid extraction of gold by in-situ catalytic oxidation with N-bromosuccinimide.HELIYON,8(6),12. |
| MLA | Liu, Xiang,et al."Eco-friendly and rapid extraction of gold by in-situ catalytic oxidation with N-bromosuccinimide".HELIYON 8.6(2022):12. |
入库方式： OAI收割
来源：过程工程研究所
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