Arsenic(V) removal from enargite leach solutions by precipitation of magnesium ammonium arsenate

被引：7

作者：

Li, Tengfei ^{[1
]}

Zhang, Yansheng ^{[1
]}

Zhang, Bo ^{[1
]}

Chang, Kexin ^{[1
]}

Jiao, Fen ^{[1
]}

Qin, Wenqing ^{[1
]}

机构：

[1] Cent S Univ, Sch Minerals Proc & Bioengn, Changsha, Hunan, Peoples R China

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2019年 / 54卷 / 11期

基金：

中国国家自然科学基金;

关键词：

Arsenic removal; precipitation; magnesium ammonium arsenate; magnesium arsenate; TOOELEITE; MINERALS; KINETICS; AS(III); CALCIUM; WATER;

D O I：

10.1080/01496395.2018.1538245

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This study investigated a potential method for the removal of arsenic from enargite leach solution containing 5.86 g/L As(V) by precipitation of magnesium ammonium arsenate (MAA). The experimental results showed the As(V) concentration can be reduced to 1.8 mg/L under the optimum conditions. The molar ratio NH4/Mg/As in precipitates formed at different pH values was checked by wet chemical analysis, indicating that some of by-products such as Mg-3(AsO4)(2), Mg(OH)(2), and MgHAsO4 will be formed at the solution pH above or below pH 9.5. Notably, this study indicated MAA has a better ability for arsenic removal than magnesium arsenate. The precipitates also were characterized by XRD and SEM.

引用

页码：1862 / 1870

页数：9

共 32 条

[31] Recovery of phosphate and ammonium as struvite from semiconductor wastewater
Warmadewanthi
Liu, J. C.
[J]. SEPARATION AND PURIFICATION TECHNOLOGY, 2009, 64 (03) : 368 - 373
[32] Structural substitution for SO4 group in tooeleite crystal by As(V) and As(III) oxoanions and the environmental implications
Yang, Jinqin
Yan, Yuchen
Hu, Keren
Zhang, Guanshi
Jiang, Dongyi
Li, Qingzhu
Ye, Bin
Chai, Liyuan
Wang, Qingwei
Liu, Hui
Xiao, Ruiyang
[J]. CHEMOSPHERE, 2018, 213 : 305 - 313

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