PAC与PDMDAAC复合混凝剂去除高浊度水中有机氯

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Abstract

The elimination of turbidity and organochlorine (OCPs) in high-turbidity water by enhanced coagulation was studied. A composite coagulant was prepared by Poly Aluminium Chloride (PAC) and Poly Dimethyl Diallyl Propy Ammoniuml Chloride (PDMDAAC). The effect of PAC-PDMDAAC composite ratio, dosage of the composite coagulant, initial turbidity, the time for slow stirring and pH on the elimination efficiencies of turbidity and OCPs were tested and characterized by fractal dimension of flocs and Zeta potentials to verify the result. The results show that PAC-PDMDAAC ratio has great influence on the removal effect of OCPs and turbidity. The removal rates of turbidity and OCPs reach the highest values when the PAC-PDMDAAC composite ratio is 5:1, the dosage of PAC-PDMDAAC is 1ml/L, and the time for slow stirring is 15min. With the increase of initial turbidity, the removal rate of OCPs in the water is also increased which shows that the PAC-PDMDAAC apply to high turbidity water. Compared with other coagulants, The PAC-PDMDAAC composite coagulant has wide pH range suitable for use, the removal rates of turbidity and OCPs reach the best when the pH is 4. The coagulation effects are well verified and explained by measuring the fractal dimension of flocs and Zeta potential of particles.

Key words： high turbidity water OCPs enhanced coagulation PAC-PDMDAAC composite coagulant

Received: 15 November 2015

PACS:

X703.5

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	Articles by authors
	HE Jian-dong
	LIU Peng-yu
	CHANG Qing
	ZHANG Cui-ling

Cite this article:

HE Jian-dong,LIU Peng-yu,CHANG Qing等. Efficiency of the PAC-PDMDAAC composite coagulant for eliminating the organochlorines in high-turbidity water[J]. CHINA ENVIRONMENTAL SCIENCECE, 2016, 36(6): 1738-1745.

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http://manu36.magtech.com.cn/Jweb_zghjkx/EN/ OR http://manu36.magtech.com.cn/Jweb_zghjkx/EN/Y2016/V36/I6/1738

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