二氧化氯处理矿山含氰废水的实验研究

实验采用二氧化氯 ( Cl O2 )作为矿山含氰废水处理剂 ,含氰废水在 p H 8.5～ 11.5之间 ,Cl O2 /CN- ≥ 3 (质量比 )的条件下 ,搅拌反应 3 0 min后 ,氰化物去除率达 99%以上 ,p H<9,CN- <0 .5 mg/L,达到《污水综合排放标准》中的一级标准。实验表明 ,利用 Cl O2 的强氧化性处理矿山含氰废水 ,具有投药量少、使用便捷、无二次污染等优点 ,且处理效果明显优于传统次氯酸盐处理法。

Experimental study on ClO2 for mine wastewater containing cyanogens treatment

In the experiment, ClO2 was applied to treat mine wastewater containing cyanogens. When the mine wastewater of pH rung from 8.5 to 11.5, and ClO-2/CN+- exceeded 3, and stired reaction was 30 mins , the removal rate of the cyanide in mine wastewater is 99%, the treated wastewater of pH is 9, the CN+- concentration is reduced to 0.5 mg/L. Those meet stair grade of integrated wastewater discharge standard. Using strong oxidation agent of ClO-2 treated mine wastewater of cyanogens not only has many advantages, less dosage, convenient usage and no secondary pollution, but also has more apparente efficiency than traditional way of hypochlorite.