微电解法处理铜冶炼废水中重金属离子研究

MICRO-ELECTROLYSIS TREATMENT OF COPPER SMELTING OF HEAVY METALS IN WASTEWATER

采用铁炭微电解催化还原法处理某铜冶炼厂废水,讨论了影响去除效果的各种因素,用电镜扫描和能谱(SEM与EDS)观察了反应后的铁炭表面。结果表明,在初始pH为3、100 mL废水中加入铁炭总量5 g、铁炭质量比为1:1、停留时间30 min时,处理效果最佳,此时Cu2+、Pb2+、Zn2+的去除率分别达到95.6%、91.8%、70.9%;铁屑表面吸附了大量的铜;活性炭表面元素成分复杂,主要为O和Fe,吸附不是活性炭去除重金属的主要方法。

The experiment using carbon micro electrolysis catalytic reduction of a copper smelter in Yunnan wastewater treatment, and the parameters that affected the efficiencies of the wastewater treatment had been discussed, The results indicated that the optimal experimental conditions were initial pH 3, the total amount of iron and carbon 5 g/0.1 L, iron carbon mass ratio of 1, the reaction time was 30 rain, the removal rate of the Cu^2＋, Pb^2＋, Zn^2＋ was 95.61%, 91.8%, 70.9%. Scanning electron microscopy and energy-dispersive spectrometry （SEM and EDS） of the reaction of iron and carbon surface, analyzing the surface morphology and composition.