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Journal of Zhejiang University SCIENCE A

ISSN 1673-565X(Print), 1862-1775(Online), Monthly

2004 Vol.5 No.6 P.721-726

Study on coagulation property of metal-polysilicate coagulants in low turbidity water treatment

YANG Hai-yan, CUI Fu-yi, ZHAO Qing-liang, MA Chao

School of Municipal & Environment Engineering, Harbin Institute of Technology, Harbin 150090, China

haiyanyang_hw@sina.com

Abstract: In order to remove the low turbidity present in surface water, a novel metal-polysilicate coagulant was used to treat the raw water taken from Tanjiang River in Guangdong Province. This study on the effects of Al/Fe molar ratio on the performance of a complex compound formed by polysilicic acid, aluminium and ferric salt (PAFS) showed that PAFS with Al/Fe ratio of 10:3 seemed to have the best coagulation performance in removing turbidity and color. Experimental results showed that under the conditions of polymerization time of 15 d, sedimentation time of 12 min, and pH of 6-8, PAFS with Al/Fe molar ratio of 10:3 had the best coagulation efficiency and lowest residual Al concentration. The turbidity decreased from 23.8 NTU to 3.23 NTU and the residual Al concentration was only 0.165 mg/L in the product water. It could be speculated that colloidal impurities and particulate Al were removed by adsorption bridging and electrical neutralization of long chain inorganic polymer coagulants.

Key words: Potable water treatment, Metal-polysilicate coagulant, Coagulation property, Residual aluminum


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amy<yang-qing1989@163.com>

2015-01-31 11:06:01

tank you ! i want to obtain the paper to help my research

rashmita@thummar<rashmithummar5@gmail.com>

2014-10-07 17:00:08

its is most usefull in feild work

Roshan Baral@Central Department of Chemistry Tribhuvan University Nepal<baralroshan3@yahoo.com>

2013-08-20 13:01:34

Hi. I am a student from Central Department of Chemistry Tribhuvan University Nepal. My name is Roshan Baral. Currently I am working on my thesis based on water treatment by using coagulant and for that it would be really helpful if I get to read your complete paper. Any other related articles will also be equally appreciated. Thank You.

Steve Amos@University of Adelaide<steven.amos@adelaide.edu.au>

2012-07-12 15:28:49

thanks

hadi@No address<hadighali2000@yahoo.com>

2012-01-10 03:27:42

Helo sire

Can you help me by send me this article please

becouse i am working know for treatment of water by added

coaglation.

yanping@Zhejiang University of technology<qyp15810610@126.com>

2011-07-25 14:38:11

thank you! i want to obtain this article to help my research.

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DOI:

10.1631/jzus.2004.0721

CLC number:

TU991.27

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Received:

2003-10-04

Revision Accepted:

2003-12-16

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