桂林市饮用水源突发性Pb2+污染的应急处理技术

摘要

Abstract:Emergency treatment for drinking water sudden pollution is studied by beaker experiment.In the condition of polyaluminium chloride (PAC) average dosage,the water plant can handle the concentration of Pb2 + of 0.02 mg/L.Changing the composition of coagulant and increasing the polyacrylamide (PAM) can improve the removal of Pb2+.To make the water up to the standard,the relationship between the minimum coagulant and the concentration of Pb2+ in influent water is y =-1 141.4x2 +296.17x-3.084 9 (mg/L) in the condition of appropriate component of coagulants and dosage of PAM.The relationship between Pb2+ concentration in raw water and the minimum drug dosage is significant to ensure the residual Pb2+ concentration up to the drinking water health standards (GB 5749-2006),providing Pb2+ pollution emergency treatment for drinking water source in Guilin.%采用烧杯实验对桂林市自来水厂突发性Pb2+污染应急处理技术进行了研究.结果表明:自来水厂现行工艺以及多年平均PAC投加量条件下,能处理的进水最大Pb2+浓度为0.02 mg/L;改变混凝剂组分,可以使进水Pb2+浓度超标4倍的出水水质达标；投加PAM可以提高Pb2+去除效果,能使Pb2+浓度0.1 mg/L的原水经处理后出水水质达标.使出水达标的最小混凝剂投加量与进水Pb2+浓度的关系为y=-1 141.4x2+ 296.17x-3.084 9；在保证出水残余Pb2+浓度达到《生活饮用水卫生标准》(GB 5749-2006)要求的条件下,根据此式计算出不同原水Pb2+浓度下的最小药剂投加量,为桂林市饮用水源突发性Pb2+污染应急处理提供依据.