Document Detail


Characteristics of coagulation-flocculation of humic acid with effective performance of polymeric flocculant and inorganic coagulant.
MedLine Citation:
PMID:  12578179     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Ferric chloride and aluminium sulphate as coagulants and positive charged flocculants PDDMAC ((PDDMAC = poly (diallyldimethylammonium chloride) were used for pre-treatment of water and wastewater for removing humic substance prior to RO membrane filtration. It was found that a combination of flocculant and coagulant enhanced the coagulation-flocculation process and humic acid removal. The optimum conditions of coagulation-flocculation were established in reference to the ratio of humic acid and coagulant. Zeta potential and the ratio of E4/E6 were investigated to explore the possible micro-mechanisms of coagulation-flocculation. The ratios of E4/E6 show the molecular size variations using different coagulants and flocculants, which are expected to benefit membrane-fouling control.
Authors:
J Yu; D D Sun; J H Tay
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Water science and technology : a journal of the International Association on Water Pollution Research     Volume:  47     ISSN:  0273-1223     ISO Abbreviation:  Water Sci. Technol.     Publication Date:  2003  
Date Detail:
Created Date:  2003-02-11     Completed Date:  2003-05-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9879497     Medline TA:  Water Sci Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  89-95     Citation Subset:  IM    
Affiliation:
Environmental Engineering Research Centre, School of Civil & Structural Engineering, Nanyang Technological University, Singapore, 639798. cjyu@ntu.edu.sg
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MeSH Terms
Descriptor/Qualifier:
Dimethylamines / chemistry
Ferric Compounds / chemistry
Filtration
Flocculation
Humic Substances / chemistry*
Membranes, Artificial
Polymers
Water Purification / methods*
Chemical
Reg. No./Substance:
0/Dimethylamines; 0/Ferric Compounds; 0/Humic Substances; 0/Membranes, Artificial; 0/Polymers; 124-40-3/dimethylamine

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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