粉末活性炭对甲基对硫磷和对硫磷的去除研究

通过对粉末活性炭吸附特性的研究,探讨了活性炭工艺去除饮用水中甲基对硫磷和对硫磷有机磷农药的可行性。用Freundlich公式拟合吸附等温线的数据,并用来估算活性炭的吸附容量和最大投加量。试验结果表明,向甲基对硫磷、对硫磷浓度分别为0.22,0.06mg/L的配水中投加10mg/L粉末活性炭,吸附时间20min时两者的去除率为93.66%～98.11%。针对南方某水厂原水,试验所确定的活性炭最佳投加量为1.5～2.0mg/L。试验证明投加粉末活性炭是去除饮用水中甲基对硫磷和对硫磷的有效方法。

Removal of methyl parathion and parathion by powdered activated carbon

The feasibility of removal for methyl parathion and parathion by powdered activated carbon （PAC）was discussed. The adsorption isotherm data were fitted by Freundlieh formula and the data were used to estimate of the adsorption capacity and maximum dosage of PAC. The results showed that the removal rate reached 93. 66% to 98. 11%, using the dosage of PAC of 10 rag/L, when the concentrations of methyl parathion and parathion were 0.22 mg/L and 0.06 mg/L respectively and adsorption time was 20 min. The optimal dosage was 1.5 to 2.0 mg/L for raw water of a waterworks in south China. It also showed PAC technology was an effective method for removal of methyl parathion and parathion in drinking water.