期刊论文

Zheng, Y.-J.

中文

中国有色金属学报

1004-0609

2020

30

7

1667-1676

10.11817/j.ysxb.1004.0609.2020-37601

湖南省重点研发计划项目（2017SK2254）~~；

本校为其他机构

采用复合盐沉淀法处理含砷废水,研究了钙砷比、铜砷比、铁砷比、锌砷比对砷脱除率的影响,并以硫酸浓度、液固比、浸出时间、浸出温度为考察因素,对含砷沉淀渣进行浸出,从浸出液中回收三氧化二砷,同时回用脱砷后母液。结果表明:在n(Ca)/n(As)=1.05、n(Cu)/n(As)=0.45、n(Fe)/n(As)=1.20、n(Zn)/n(As)=1.20的复合盐配比下,处理初始As(Ⅲ)浓度为0.05~9.76 g/L含砷废水时,砷残留浓度均低于14 mg/L,通过增加复合盐用量进行二次脱砷沉淀,滤液中铜、锌、砷浓度在《污水综合排放标准》(GB 8978—1996)范围内。在液固比(mL:g)为3:1、浸出时间为0.5 h、浸出温度为25℃、硫酸浓度0.87 mol/L条件下对含砷渣进...

Arsenic-containing wastewater was treated by compound salt precipitation method. The effects of calcium-arsenic ratio, copper-arsenic ratio, iron-arsenic ratio and zinc-arsenic ratio on arsenic removal rate were studied. Taking sulfuric acid concentration, liquid-solid ratio, leaching time and leaching temperature as factors to investigate, the arsenic-containing precipitated slag was leached, and arsenic trioxide was recovered from the leaching solution, and the mother liquor after arsenic removal was reused. The results show that, under the o...