钡盐共沉法处理酸性含铅废水

Treatment of acidic lead-containing wastewater by depositing together with barium salt

硫酸盐、氯化物复杂体系含铅酸性废水对环境的污染比较严重,并且不易处理。采用钡盐共沉法对含铅废水的处理进行研究,结果表明,钡盐共沉法可有效除去废水中的铅,但除铅效果受铅与废水中氯离子络合程度的影响,而受反应时间、温度、陈化时间的影响较小,容易实现工业化。采用钡盐共沉法处理硫酸盐氯化物复杂体系酸性废水,处理后的废水中含铅量远低于0.5 mg/L。

The environmental pollution caused by the complex solution containing sulphate and chlorinate is serious, and it is difficult to dispose it directly. Barium carbonate has been used to remove lead by depositing together with lead sulphate. The results showed that lead ion in lead-containing wastewater could be removed effectively when barium carbonate co-depositing method was adopted. But the removal effect was mainly impacted by complexation degree between Pb^2＋ and Cl^- in effluent, and was little affected by reaction time, temperature, and aging time. Thus, this kind of technology is prone to realize in industry. The result showed that the lead contained in the acidic wastewater containing sulphate and chlorinate was less than 0. 5 mg/L after being treated by adding barium salt.