高分子絮凝剂下泥沙絮体结构的分形特性  

Fractal properties of sediment aggregate structures with the addition of macromolecular flocculants

作　　者：李冬梅[1] 李志生[1] 谭万春[2] 金同轨[3] 

机构地区：[1]广州大学城广东工业大学建设学院,广东广州510006 [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：《泥沙研究》2006年第5期40-44,共5页Journal of Sediment Research

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：在黄河泥沙高浓度悬浊液中投加高分子絮凝剂,架桥絮凝沉降实验与电镜实验研究表明,絮体结构的形成与生长具有分形特性。借助分形数学理论中特征参数“分维D”定量分析了高分子种类、高分子的分子量、不同投加剂量与浓度下絮体结构的分形特性及其构型特征,讨论了高分子絮凝剂的架桥絮凝机理以及高分子絮凝剂在含沙高浊水中的分形行为,为含沙高浊水中高分子絮凝剂的正确选择提供了一种新的思路。By adding macromolecular flocculants into high turbid concentration suspensions of the Yellow River, bridging flocculated settling experiments and SEM indicate that there are fractal properties of silt aggregate structures and formation processes. When the following factors of macromolecular polymers are changed, such as polymers types, molecular weight, dosage, different concentration, the fractal structure properties and configuration characteristics of silt aggregates are quantitatively analyzed by the parameter ＂fractal dimension D＂ in the fractal mathematics theory. The paper also discusses the bridging flocculation mechanism of macromolecular polymers and the fractal behaviors of macromolecular flocculants in the high turbid water. The research provides a way to choose proper macromolecular polymers in the highly turbid suspensions.

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 

分 类 号：X131.2[环境科学与工程—环境科学] TV149[水利工程—水力学及河流动力学]