聚合氯化铝对水体中双酚A的混凝特征  

Coagulating character of polyaluminum chloride on bisphenol A in water body

作　　者：王梓松[1] 谢更新[1] 曾光明[1] 张长[1] 马晓莹[1] 余健[2] 

机构地区：[1]湖南大学环境科学与工程学院,湖南长沙410082 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《中国环境科学》2008年第6期531-535,共5页China Environmental Science

基　　金：国家杰出青年基金资助项目(50425927);长江学者和创新团队发展计划资助项目(IRT0719);国家自然科学基金资助项目(50708032)

摘　　要：以聚合氯化铝（PAC）作为混凝剂,探讨了双酚A（BPA）在模拟水体混凝过程中的去除效果和混凝特征.结果表明,在较低TOC浓度和浊度条件下,随着PAC投加量的增加,BPA的去除率呈先上升后下降的趋势,本实验条件下最优的混凝剂投加量约为BPA/PAC=1：2.6（质量比）.pH值6.0-8.0时,混凝对BPA有相对较好的去除效果,此时水体中铝盐多核络合物的电中和是混凝的主要作用机理.原水中的腐殖酸类有机物和浊度物质对BPA的混凝过程有较大的影响,较高浓度的腐殖酸类物质会削弱PAC对BPA的混凝效果,而随着浊度的提高,BPA的去除率呈先上升后下降的趋势.Using polyaluminum chloride （PAC） as coagulant, the removal efficiency and coagulation character of bisphenol A （BPA） in simulated water body coagulation process was investigated. Under the condition of lower TOC concentration and turbidity, with increasing of PAC adding amount the removal efficiency of BPA appeared the tendency of first rised and then lowered. Under this treat condition, the most optimal coagulant adding amount was about BPA/PAC=1：2.6 （mass rate）. When pH value was 6.0-8.0, coagulation on BPA had appropriately level removal rate, in this time, the charge-neutralizing mechanism by polynuclear aluminous salts was the main action mechanism of coagulation. The humic acid type organic matter and the turbidity matters in original water had great influence on BPA coagulation process, humic acid type matter of higher concentration could weaken PAC on BPA coagulation effect, and with the enhancing of turbidity, the removal rate of BPA appeared the tendency of first enhancing and then lowering.

关 键 词：聚合氯化铝 双酚A 混凝 絮凝体 

分 类 号：X131.2[环境科学与工程—环境科学]