Mechanism of kaolinite and titanium dioxide flocculation using chitosan - assistance by fulvic acids?

被引：40

作者：

Divakaran, R ^{[1
]}

Pillai, VNS ^{[1
]}

机构：

[1] Cochin Univ Sci & Technol, Sch Environm Studies, Cochin 682016, Kerala, India

来源：

WATER RESEARCH | 2004年 / 38卷 / 08期

关键词：

chitosan; coagulation; flocculation; fulvic acids; humic substances; kaolinite; silt; titanium dioxide; turbidity; water treatment;

D O I：

10.1016/j.watres.2003.09.015

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Flocculation of kaolinite using chitosan alone as flocculant has been reported to be difficult. Detailed investigations in our laboratory have shown that kaolinite can be easily removed from aqueous suspensions by flocculation and settling using chitosan, provided the suspension medium contains traces of dissolved humic substances. The flocculation is also extremely sensitive to the pH of the suspension. Removal of suspended titanium dioxide particles in water by flocculation using chitosan in presence of humic acids is also reported for the first time. A plausible mechanism explaining these observations is proposed in this paper. (C) 2003 Elsevier Ltd. All rights reserved.

引用

页码：2135 / 2143

页数：9

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