去除农药废水中铜、锌离子的方法研究

研究了NaOH、Na2S沉淀法和微电解-沉淀絮凝法去除农药废水中的铜、锌离子。探讨了三种处理方法的控制因素及其对铜、锌离子去除效果的影响。最终确定处理方案为：调节含铜、锌废水pH值为8后,每升废水分别加入Na2S0.59g和0．48g,处理后溶液中铜、锌离子含量分别为6mg／L和1mg／L,可进入生化配水池稀释10倍后,铜、锌离子含量均小于1mg／L,对微生物降解无影响,达到排放标准。

Study on the Removal of Cu and Zn Ions from the Wastewater of Pesticide Production

Methods of precipitation with NaOH or Na_2S and micro-electrolysis flocculation to remove Cu~(2+) and Zn~(2+) from the pesticide wastewater were studied. The factors affecting the removal efficiency were discussed. In the precipitation method the pH of the wastewater was adjusted to 8, and 0.59 g (0.48 g) the wastewater containing Cu~(2+)(Zn~(2+)). The treated filtrates containing 6 mg/L of Cu~(2+) and 1 mg/L of Zn~(2+) colud be discharged after being diluted 10 times. The effluent has no harm to microbiologic degradation.