【摘要】 采用实验室配制含铅的微污染原水,研究高锰酸钾氧化和粉末活性炭吸附组合工艺强化混凝对铅的去除效果,确定高锰酸钾与粉末活性炭的最佳组合参数。结果表明,聚合氯化铝最佳投量下沉淀出水的浊度、UV254和Pb2+分别为0.164NTU、0.0099cm-1和0.1692mg/L,平均去除率分别为97.48%、71.71%和82.69%;确定出高锰酸钾与粉末活性炭强化混凝的最佳组合是粉末活性炭投加40mg/L吸附120min,高锰酸钾投加2.0mg/L预氧化2min,组合工艺明显提高了传统混凝沉淀工艺除污染效果,对浊度、UV254和Pb2+去除率平均提高了0.57、14.86和17.08个百分点。通过小型在线处理工艺试验系统研究动态工艺的除污染效果,综合评价其应对水中突发性铅污染的可行性,结果表明,组合工艺沉后水浊度平均为0.206NTU,UV254为0.0045cm-1,Pb2+均未检出。更多还原

【Abstract】 Lead removal effect on enhanced coagulation combined with potassium permanganate preoxidation and powered activated carbon adsorption processes is studied by laboratory-scaled experiments and prepared lead and organic micro-polluted raw water.The optimal combination parameters of potassium permanganate and powder activated carbon are determined.The result shows that turbidity,UV254 and Pb2+ contents of the sedimentation effluent are 0.164NTU,0.0099cm-1 and 0.1692mg/L,with average removal rates of 97.48%,71.71% and 82.69% separately.The optimum combination is determined with powder activated carbon dosage of 40mg/L for 120 minute adsorption and KMnO4 dosage of 2.0mg/L for 2 minute preoxidation.The pollutant removal effects are obviously improved by the combined process compared with conventional process.The average removal rate of turbidity,UV254 and Pb2+ contents are increased 0.57%,14.86% and 17.08%.The pollutant removal effects are studied by small-scaled online water treatment experimental system.The treatment feasibility of emergency lead pollution in raw water is also evaluated.The experimental results shows that the removal rate of turbidity,UV254 and Pb2+ contents of sedimentation effluent are 0.0206NTU,0.0045cm-1 and non-detected.更多还原