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

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