河流突发镍污染应急处理方法探究与工程实践

Exploration on Emergency Treatment Methods and Engineering Measures for Nickel Pollution in Rivers

以榕江流域某金属工业园消防废水泄露导致河流镍浓度异常为例,对比分析了石灰沉淀法、氢氧化钠沉淀法、石灰沉淀+粉末活性炭吸附法在镍污染应急处置工程种的效果和可行性。结合应急现场的实际情况,石灰沉淀+粉末活性炭吸附法更适宜于受污染河水的原位处置,氢氧化钠沉淀法更适宜于河水的异位处置,两种方法成功应用于河流镍浓度超标的应急处置工程中,都可以将河水中镍的浓度降低至0.05 mg/L以下,满足《城镇污水处理厂污染物排放标准》(GB 18918-2002)中出水镍浓度限制要求,取得了良好的效果。

Taking the abnormal nickel concentration in a metal industrial park in Rongjiang River basin as an example,the effects and feasibility of lime precipitation method,sodium hydroxide precipitation method and lime precipitation+activated carbon adsorption method in nickel pollution emergency treatment projects were compared and analyzed.In combination with the practical situation of the emergency,lime precipitation+activated carbon adsorption method was more suitable for in situ disposal of polluted river water,sodium hydroxide precipitation method was more suitable for the ectopic disposal,two kinds of method were successfully applied in river nickel chroma of the emergency disposal project with reducing the c nickel concentration below 0.05 mg/L,which meeting the requirement of limit of effluent nickel concentration in discharge standard of pollutants for municipal wastewater treatment plant(GB 18918-2002),and good results were achieved.