A new process of continuous three-stage co-precipitation of arsenic with ferrous iron and lime

被引：58

作者：

Cui, Jie ^{[1
,2
]}

Du, Yaguang ^{[1
,2
]}

Xiao, Hongxia ^{[1
,2
]}

Yi, Qiushi ^{[3
]}

Du, Dongyun ^{[1
,2
]}

机构：

[1] South Cent Univ Nationalities, State Ethn Affairs Commiss, Key Lab Catalysis & Mat Sci, Inst Environm Engn & Sci,Sch Chem & Mat Sci, Wuhan 430074, Peoples R China

[2] South Cent Univ Nationalities, Minist Educ, Wuhan 430074, Peoples R China

[3] Wuhan Qingliu Technol Co Ltd, Wuhan, Peoples R China

来源：

HYDROMETALLURGY | 2014年 / 146卷

关键词：

Acid wastewater; Arsenic; Co-precipitation; Ferrous sulfate; Lime; FERRIC ARSENATE; REMOVAL; OXIDATION; AS(III);

D O I：

10.1016/j.hydromet.2014.03.012

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Disposal of acid wastewater containing arsenic (As) from a metallurgical plant was systematically studied and a novel continuous three-stage treatment process was advanced based upon lime-ferrous flocculation technology. At first, the effect of FeSO4 center dot 7H(2)O dosage, temperature, reaction time and neutralization reagent on As removal efficiency was evaluated in a bench scale test. Then, the influence of oxidants (air and bleaching powder) and FesO(4)center dot 7H(2)O dosage on As removal efficiency, was also tested in a pilot scale experiment. Finally, the removal of As from acid wastewater in industrial scale was evaluated based on the obtained optimized parameters from the bench and pilot scale tests. The results showed that the residual As in the final outflow water was less than 03 mg/L, which met the demands specified in Emission Standard of Pollutants for the Sulfuric Acid Industry issued by Ministry of Environmental Protection of China (GB26132-2010). The proposed strategy is efficient in utilizing a low cost and promising in industrial application. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：169 / 174

页数：6

共 26 条

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