| 阳离子聚电解质聚二甲基二烯丙基氯化铵的絮凝机理初探 |
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| 引用本文： | 田秉晖,栾兆坤,潘纲.阳离子聚电解质聚二甲基二烯丙基氯化铵的絮凝机理初探[J].环境科学学报,2007,27(11):1874-1880. |
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| 作者姓名： | 田秉晖 栾兆坤 潘纲 |
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| 作者单位： | 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 |
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| 基金项目： | 国家重点基础研究发展计划(973计划) |
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| 摘 要： | 以聚二甲基二烯丙基氯化铵PDADMAC(特性粘度分别为2.7,1.4,0.7)为絮凝剂,对比PAC和PFC,通过残余浊度、Zeta电位、FI絮凝指数的测定,研究了PDADMAC对高岭土悬浊体系(浊度分别为6000,1000,200和10 NTU)的絮凝特性,并对其絮凝作用机理进行了探讨.结果表明,PDADMAC的吸附构型决定其絮凝机理在较低初始悬浊物浓度下(200 NTU)为单个颗粒物表面吸附覆盖及其"吸附电中和"絮凝模型;在高浊条件下(＞1000 NTU)为单颗粒表面(Monomer)部分吸附覆盖及其"吸附架桥"絮凝模型.
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| 关 键 词： | 絮凝 阳离子聚电解质 聚二甲基二烯丙基氯化铵 |
| 文章编号： | 0253-2468（2007）11-1874-07 |
| 收稿时间： | 2006/3/23 0:00:00 |
| 修稿时间： | 2006-03-23 |
Flocculation mechanism of the cationic polyelectrolyte-polydiallyldimethylammonium chloride (PDADMAC) |
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| TIAN Binghui,LUAN Zhaokun and PAN Gang.Flocculation mechanism of the cationic polyelectrolyte-polydiallyldimethylammonium chloride (PDADMAC)[J].Acta Scientiae Circumstantiae,2007,27(11):1874-1880. |
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| Authors: | TIAN Binghui LUAN Zhaokun and PAN Gang |
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| Institution: | State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085 |
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| Abstract: | The flocculation mechanism of polydiallyldimethylammonium chloride (PDADMAC) in the kaolin suspension system was studied using optical monitoring, zeta potential measurement and residual turbidity measurement. The results showed that the flocculation mechanism of PDADMAC mainly depends on the adsorption and conformation of PDADMAC. Under low turbidity conditions (200 NTU), the main flocculation mechanism is "adsorption charge neutralization action". Under high turbidity conditions (>1000 NTU), "adsorption bridging action" plays an important part in the mechanism. |
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| Keywords: | flocculation cationic polyelectrolyte polydiallyldimethylammonium chloride |
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