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| 阳离子型聚丙烯酰胺投加量对絮体性状特征的影响 | |
| 引用本文： | 朱哲,李涛,王东升,姚重华,汤鸿霄.阳离子型聚丙烯酰胺投加量对絮体性状特征的影响[J].环境化学,2007,26(2):175-179. |
| 作者姓名： | 朱哲 李涛 王东升 姚重华 汤鸿霄 |
| 作者单位： | 1. 华东理工大学资源与环境工程学院,上海,200237;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 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 3. 华东理工大学资源与环境工程学院,上海,200237 |
| 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. |
| 关 键 词： | 絮体 阳离子型聚丙烯酰胺 |
| 修稿时间： | 2006-03-06 |
EFFECT OF CATIONIC PAM DOSAGE ON THE MICRO-PROPERTIES OF FLOCS |
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| ZHU Zhe,LI Tao,WANG Dong-sheng,YAO Chong-hua,TANG Hong-xiao.EFFECT OF CATIONIC PAM DOSAGE ON THE MICRO-PROPERTIES OF FLOCS[J].Environmental Chemistry,2007,26(2):175-179. | |
| Authors: | ZHU Zhe LI Tao WANG Dong-sheng YAO Chong-hua TANG Hong-xiao |
| Institution: | 1. Resources and Environmental Engineering Institute, East China University of Science and Technology, Shanghai, 200237, China; 2 State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China |
| Abstract: | 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. |
| Keywords: | flocs cationic polyacrylamide |
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