高分子絮凝剂对泥沙絮体分形结构的影响  

EFFECT OF HIGH POLYMER FLOCCULANT ON FRACTAL STRUCTURES OF SEDIMENT AGGREGATES

作　　者：李冬梅[1] 谭万春[2] 梅胜[1] 金同轨[3] 

机构地区：[1]广东工业大学建设学院,广东广州510643 [2]长沙理工大学化学与环境工程系,湖南长沙410076 [3]西安建筑科技大学环境与市政工程学院,陕西西安710055

出　　处：《水处理技术》2006年第10期13-16,共4页Technology of Water Treatment

基　　金：国家自然科学基金项目(50078043);广东工业大学博士基金项目(053024)

摘　　要：黄河泥沙架桥絮凝沉降实验与电镜实验研究表明,絮体结构具有分形特性。文章讨论了高分子絮凝剂的架桥絮凝机理以及高分子所带电荷种类、高分子的分子量、投加剂量与浓度对絮体分形结构的影响,并用表征絮体结构分形特性的参数“分维D”定量分析了这种影响规律。同时,对比了相同含沙量下无机混凝剂絮体与高分子架桥絮体结构达最佳时的分形特征及所需的混凝控制指标Gt值。Bridging flocculated settling experiment and SEM for Yellow-River water sediments indicates fractal properties of aggregates structure. Bridging flocculated mechanisms and the effects of high molecular weight flocculant （such as charge types, molecular weight, dosage and concentration） on fractal structure of aggregates are discussed. Furthermore, the parameter ＂fractal dimension D＂ which can characterize the fractal properties of aggregates structures quantitatively is used to analyze above effects regularities. Meanwhile, under the same sand content was compared the fractal characteristics and coagulation control ingex Gt needed when inorganic flocculant floe and high polymer bridging floc structure reached the optimization.

关 键 词：黄河泥沙 高分子絮凝剂 架桥絮凝机理 分形结构 分形维数 混凝控制指标Gt 

分 类 号：TQ314.253[化学工程—高聚物工业]