pH对聚合铝形态分布与混凝效果的影响  

Influences of p H on polyaluminium chloride species distribution and coagulation effect

作　　者：袁辉洲[1] 柯水洲[2] 涂家勇 朱佳[1] 韦伟[3] 高静思 

机构地区：[1]深圳职业技术学院建筑与环境工程学院,广东深圳518055 [2]湖南大学土木工程学院,湖南长沙410082 [3]哈尔滨工业大学市政与环境工程学院,黑龙江哈尔滨150090 [4]深圳市清淼环保科技有限公司,广东深圳518055

出　　处：《工业水处理》2016年第4期50-53,共4页Industrial Water Treatment

基　　金：国家自然科学基金(51478274);2013深圳科技创新项目(CYZZ20130319145027392)

摘　　要：为了解聚合铝的混凝作用机理,以不同碱化度的聚合铝为混凝剂,考察了p H对聚合铝的形态分布、混凝效果及总溶解性残余铝的影响。结果表明,p H对聚合铝形态分布的影响十分明显,碱化度越低影响越显著;预制Alb和Alc在混凝过程中相对比较稳定,而低聚合度的Ala受p H影响显著;Ala在混凝过程中表现出阳离子的性质,电中和能力弱;与高Alb含量的聚合铝相比,高Alc含量的聚合铝出水浊度降低,但不能提高出水中的溶解性有机物去除率;总溶解性残余铝含量与混凝过程中Ala的含量有直接关联。In order to clarify the coagulation mechanism of polymeric aluminum chloride（PAC）,using polyaluminium chloride with different alkalinity as coagulants,the influences of p H on the species distribution of polyaluminium chloride,coagulation effect,and total soluble residual aluminium are investigated. The results show that p H has significant influence on species distribution of polyaluminium chloride. The lower the alkalinity is,the more significant the influence is. The prefabricated Alband Alcare relatively pretty stable in the coagulation process, and the Alawith low polymerization degree is affected by p H more significantly. Alashows cationic property in the coagulation process,and its electro-neutrality is weak. Compared with polyaluminium chloride with high Albcontent,the effluent turbidity of the polyaluminium chloride with high Alcis decreased,but the removing rate of soluble organic substances from effluent cannot be increased. The total soluble residual aluminium content is directly related to the Ala content in the coagulation process

关 键 词：聚合铝 水解形态 混凝 残余铝 

分 类 号：X703[环境科学与工程—环境工程]