Evaluation of chitosan as a natural coagulant for drinking water treatment

被引：46

作者：

Fabris, R. ^{[1
]}

Chow, C. W. K. ^{[1
]}

Drikas, M. ^{[1
]}

机构：

[1] SA Water Corp, Australian Water Qual Ctr, CRC Water Qual & Treatment, Salisbury, SA 5110, Australia

来源：

WATER SCIENCE AND TECHNOLOGY | 2010年 / 61卷 / 08期

关键词：

chitosan; coagulation; MIEX; PAC; water treatment; COLLOIDAL PARTICLES; ORGANIC-MATTER; FRACTIONATION TECHNIQUE; CATIONIC POLYMER; WASTE-WATER; REMOVAL; FLOCCULATION; BIOPOLYMER; SUSPENSIONS; FILTRATION;

D O I：

10.2166/wst.2010.833

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Chitosan, a natural biopolymer, was evaluated for its ability to be used as a coagulant to treat water for potable use both in isolation and in combination with other water treatment technologies, specifically ion-exchange and activated carbon. Chitosan was found to be very effective for particle removal at doses far below those required for equivalent turbidity removal by inorganic coagulants. However in the water sources tested, chitosan was not particularly efficient for dissolved organic carbon (DOC) removal when applied as the sole treatment step. When applied as the final clarification stage of a multi-step treatment process, chitosan exhibited limited turbidity reduction due to specific flocculation requirements. This combination of treatment technologies was also unable to further reduce secondary water quality parameters, such as disinfectant demand and trihalomethane (THM) formation.

引用

页码：2119 / 2128

页数：10

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