Characterization of the Stabilization of Arsenic in Mine Tailings

被引：6
|
作者：
Yu, Yongtao [1 ]
Qu, Guangfei [1 ]
Wu, Bin [1 ]
Lu, Qiaoli [1 ]
Ning, Ping [1 ]
机构：
[1] Kunming Univ Sci & Technol, Fac Environm Sci & Engn, 68 Wenchang Rd, Kunming, Yunnan, Peoples R China
来源：
ANALYTICAL LETTERS | 2017年 / 50卷 / 11期
基金：
中国国家自然科学基金;
关键词：
Arsenic; ferrous chloride; mine tailings; stabilization; METALS; SEDIMENTS; WASTES; SOILS; BCR;
D O I：
10.1080/00032719.2016.1244541
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Ferrous chloride has been evaluated as a novel approach to stabilize arsenic in mine tailings. The influence of iron/arsenic molar ratio, pH, stabilization time, granularity, and temperature on the concentration of released arsenic was evaluated. Arsenic speciation before and after stabilization was characterized. When the iron/arsenic molar ratio was 1 and the pH was between 6.5 and 7.5 below 50 degrees C using a stabilization time of 1 h, the concentration of released arsenic was below 2.5 mg/L which meets national Chinese standards. Hence, this approach enhanced the stability of arsenic and reduced the toxicity of mining by-products.
引用
收藏
页码：1862 / 1875
页数：14
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