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Separation Science and Technology Volume 35, 2000 - Issue 8
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Original Articles

Adsorbing Colloid Flotation with Polyaluminum Chloride: A Powerful Technique for Removing Heavy Metals from Wastewater

S. -D. HUANG DEPARTMENT OF CHEMISTRY, NATIONAL TSING HUA UNIVERSITY, HSINCHU, 30043, TAIWAN, REPUBLIC OF CHINACorrespondence[email protected]
,
P. -G. SU DEPARTMENT OF CHEMISTRY, NATIONAL TSING HUA UNIVERSITY, HSINCHU, 30043, TAIWAN, REPUBLIC OF CHINA
,
S. -P. HUANG DEPARTMENT OF CHEMISTRY, NATIONAL TSING HUA UNIVERSITY, HSINCHU, 30043, TAIWAN, REPUBLIC OF CHINA
,
Y. -L. HO DEPARTMENT OF CHEMISTRY, NATIONAL TSING HUA UNIVERSITY, HSINCHU, 30043, TAIWAN, REPUBLIC OF CHINA
&
T. -Y. TSAI DEPARTMENT OF CHEMISTRY, NATIONAL TSING HUA UNIVERSITY, HSINCHU, 30043, TAIWAN, REPUBLIC OF CHINA
Pages 1223-1232 | Received 05 Aug 1999, Published online: 15 Feb 2007
 
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Abstract

Adsorbing colloid flotation (ACF) possesses many distinct advantages for removing heavy metal ions from wastewater, but it is not much used for wastewater treatment because its separation efficiency is very poor for solutions with high concentrations of electrolyte. We demonstrate that this drawback can be eliminated by using polyaluminum chloride (PAC) as a coagulant. ACF with PAC was also tested for the removal of heavy metals from the wastewaters of a tannery and of an electroplating factory. ACF is shown to be a very promising technique for the removal of heavy metal ions from wastewater.

ACKNOWLEDGMENTS

We thank the National Science Council of the Republic of China for support (Grants NSC 87-2113-M007-042 and NSC 86-2113-M007-049).

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