文献类型：期刊文献

中文题名：阳离子型聚丙烯酰胺投加量对絮体性状特征的影响

英文题名：EFFECT OF CATIONIC PAM DOSAGE ON THE MICRO-PROPERTIES OF FLOCS

作者：朱哲[1];李涛[2];王东升[2];姚重华[1];汤鸿霄[2]

机构：[1]华东理工大学资源与环境工程学院,上海200237;[2]中国科学院生态环境研究中心环境水质学国家重点实验室,北京100085

年份：2007

卷号：26

期号：2

起止页码：175

中文期刊名：环境化学

外文期刊名：Environmental Chemistry

收录：CSTPCD;;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：国家自然科学基金项目(20477010和20677073)

语种：中文

中文关键词：絮体;阳离子型聚丙烯酰胺;沉降速率;水处理

外文关键词：flocs, cationic polyacrylamide.

摘要：应用激光粒度仪、影像分析及沉降分析技术研究了阳离子型聚丙烯酰胺(PAM)对混凝过程絮体的粒度、强度及分形维数等微观特性及絮体沉降速率的影响.结果表明,絮体的粒度、强度及分形维数等微观特性与阳离子型PAM的投加量有关,存在一个PAM的最佳投加剂量.在此最佳投加剂量下,系统内絮体的粒度与强度最大、分形维数最小、絮体沉降速率最大.
The effect of cationic polyacrylamide（PAM） on the size, strength, fractal dimension and settling velocity of the flocs was studied by methods of the laser scattering, CCD image analysis and settling analysis. The experiments were carried out in a coagulation/flocculation system composed of kaolin suspension, aluminum sulphate, and cationic PAM. The results show that the size, strength, and the fractal dimension of the flocs are tightly related with the dosage of PAM, and that in the coagulation/flocculation process there is an optimum dosage of PAM , at which the size and strength of the flocs approach to the maximum, and the same applies to the settling velocity, while the fractal dimension of the flocs reaches the minimum.