以聚铝为混凝剂的混凝再稳现象试验研究
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摘要
针对D江不同时期的水质开展试验,研究了聚合氯化铝作为混凝剂时的再稳现象。结果表明:不能仅通过常规投加量的混凝效果、有效铝含量、盐基度、水解聚合形态等指标来衡量聚合氯化铝的产品性能,还应考察其是否易出现混凝的再稳现象。以聚合氯化铝为混凝剂的混凝再稳现象,与混凝剂本身的电荷密度、悬浮颗粒物表面电荷、Zeta电位、混凝剂投加量、不适合的剪切搅拌和原水中的有机物浓度等因素有关。
Coagulation experiments were carried out on the water quality of D River in different periods,the coagulation restabilization was studied by using polyaluminium chloride( PAC) as coagulant.The results showed that the properties of PAC could not be measured only by coagulation effect under conventional dosage,effective aluminium content,basicity,hydrolysis and polymerization morphology,but also by whether PAC was prone to restabilization. The restabilization phenomenon of coagulation with PAC as coagulant was related to the charge density of coagulant itself,surface charge of suspended particulate matter, Zeta potential, coagulant dosage, improper shear stirring and organic matter concentration in raw water.
Coagulation experiments were carried out on the water quality of D River in different periods,the coagulation restabilization was studied by using polyaluminium chloride( PAC) as coagulant.The results showed that the properties of PAC could not be measured only by coagulation effect under conventional dosage,effective aluminium content,basicity,hydrolysis and polymerization morphology,but also by whether PAC was prone to restabilization. The restabilization phenomenon of coagulation with PAC as coagulant was related to the charge density of coagulant itself,surface charge of suspended particulate matter, Zeta potential, coagulant dosage, improper shear stirring and organic matter concentration in raw water.
引文
[1]王占生,刘文君,张锡辉.微污染水源饮用水处理[M].北京:中国建筑工业出版社,2016.
[2]李凤亭,何艳,潘宏杰,等.聚合氯化铝混凝性能的影响因素研究[J].工业水处理,2008,28(10):40-43.
[3]李润生,李凯.聚氯化铝水解聚合形态与混凝效果研究[J].中国给水排水,2002,18(10):45-48.
[4]刘文君,贺北平,张锡辉.生物预处理对受有机污染源水中胶体Zeta电位的影响研究[J].中国给水排水,1996,12(4):27-29.
[5]李理成.混凝体系中水解铝盐的再稳现象的研究[J].湖南环境生物职业技术学院学报,2008,14(4):15-19.
[2]李凤亭,何艳,潘宏杰,等.聚合氯化铝混凝性能的影响因素研究[J].工业水处理,2008,28(10):40-43.
[3]李润生,李凯.聚氯化铝水解聚合形态与混凝效果研究[J].中国给水排水,2002,18(10):45-48.
[4]刘文君,贺北平,张锡辉.生物预处理对受有机污染源水中胶体Zeta电位的影响研究[J].中国给水排水,1996,12(4):27-29.
[5]李理成.混凝体系中水解铝盐的再稳现象的研究[J].湖南环境生物职业技术学院学报,2008,14(4):15-19.