摘要
对于冶炼厂高含砷、镉等离子的污水,采用先投加石灰石乳将污水中游离酸制成石膏,然后用二段石灰中和处理,并同时投加硫酸亚铁,去除污水中的铜、锌、砷等重金属离子,再用磷酸镉沉淀法除镉。最终使排放污水中重金属离子含量达到国家排放标准,处理后的污水可以重复利用。
For the waste water from smelters with high contents of As and Cd ions, the treatment procedure is firstly to add lime milk to allow the free acid in the waste water to form gypsum, then conduct neutralization treatment with lime and add ferrous sulphate to remove metallic ions of Cu, Zn and As in the water, at last remove Cd with the method of cadmium phosphate precipitation to make the metallic ion content in the final effluent meet the national discharge standard, and the waste water after treatment can be recycled.
出处
《有色冶金设计与研究》
2008年第6期12-15,共4页
Nonferrous Metals Engineering & Research
关键词
含砷
镉高浓度污水
石灰乳
铁盐
磷酸三钠
pH值
共沉
waste water with high As and Cd contents
lime milk
ferric salt
trisodium phosphate
pH value
coprecipitation
