A novel method for preparing an As(V) solution for scorodite synthesis from an arsenic sulphide residue in a Pb refinery

doi:10.1016/j.hydromet.2018.11.003

	A novel method for preparing an As(V) solution for scorodite synthesis from an arsenic sulphide residue in a Pb refinery
	Ma, Xu 1,2; Gomez, Mario A.3; Yuan, Zidan 2; Zhang, Guoqing 1,2; Wang, Shaofeng 2; Li, Shifeng 3; Yao, Shuhua 3; Wang, Xin 2; Jia, Yongfeng 2
刊名	HYDROMETALLURGY
	2019
卷号	183 页码:1-8
关键词	Arsenic sulphide residue Alkaline oxidation leaching Elemental sulphur Scorodite Pb refinery
ISSN号	0304-386X
DOI	10.1016/j.hydromet.2018.11.003
英文摘要	A novel method has been proposed to prepare an arsenate (As(V))-containing solution for scorodite formation using an arsenic (As) sulphide residue obtained from a Pb refinery. Preparation of the As(V) solution from the As sulphide residue included As oxidation leaching by alternating addition of a highly concentrated sodium hydroxide (c-NaOH 600 g/L) solution and hydrogen peroxide (H2O2) at 70 degrees C. This method gave an As leaching efficiency of up to 99% (total % recovery of As up to 90%), while at the same time, other metals could be recovered effectively (e.g., 95% Pb, 97% Cd, 90% Zn, and 96% Cu). Further oxidation and removal of the remaining arsenite (As(III)) in the leached filtrate by H2O2 indicated that the oxidation efficiency of oxidizing As (III) to As(V) was up to 99%. The As(V) solution produced by this process was suitable for As(V) fixation as scorodite. X-ray diffraction (XRD) and scanning electron microscopy (SEM) were employed to characterize the starting materials and output solids. The results showed that the major As phase in the As-containing compound of the initial As sulphide residue was As sulphide. Highly pure elemental sulphur (total % recovery of S up to 30%) was generated during the S(-II) elimination process, and the scorodite from the As(V) fixation process was highly crystalline. Attenuated total reflection Fourier transform infrared spectroscopy (ATR-FTIR) and X-ray absorption near edge structure spectroscopy (XANES) were employed to characterize the intermediate filtrate of the process. The results showed that the intermediate filtrate was a multiphase mixture containing As(III), arsenate, sulphate, thio-arsenate, thio-sulphate and polysulphides (S-n(2-)). The produced scorodite showed good As stability in the TCLP and at pH 3 (0.47 mg/L), pH 5 (0.26 mg/L), and pH 7 (3.41 mg/L) in a 10-day short-term stability test.
资助项目	National Natural Science Foundation of China[41530643] ; National Natural Science Foundation of China[41673130] ; National Natural Science Foundation of China[41703133] ; National Natural Science Foundation of China[41473111] ; Chinese Academy of Sciences[QYZDJ-SSW-DQC038]
WOS研究方向	Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000458094100001
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/123911]
专题	中国科学院沈阳应用生态研究所
通讯作者	Wang, Shaofeng
作者单位	1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, Key Lab Pollut Ecol & Environm Engn, Shenyang 110016, Liaoning, Peoples R China 3.Shenyang Univ Chem Technol, Inst Environm Protect, Shenyang 110142, Liaoning, Peoples R China
推荐引用方式 GB/T 7714	Ma, Xu,Gomez, Mario A.,Yuan, Zidan,et al. A novel method for preparing an As(V) solution for scorodite synthesis from an arsenic sulphide residue in a Pb refinery[J]. HYDROMETALLURGY,2019,183:1-8.
APA	Ma, Xu.,Gomez, Mario A..,Yuan, Zidan.,Zhang, Guoqing.,Wang, Shaofeng.,...&Jia, Yongfeng.(2019).A novel method for preparing an As(V) solution for scorodite synthesis from an arsenic sulphide residue in a Pb refinery.HYDROMETALLURGY,183,1-8.
MLA	Ma, Xu,et al."A novel method for preparing an As(V) solution for scorodite synthesis from an arsenic sulphide residue in a Pb refinery".HYDROMETALLURGY 183(2019):1-8.