Document Detail


Removal of natural organic matter by cationic hydrogel with magnetic properties.
MedLine Citation:
PMID:  21377262     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Magnetic cationic hydrogel (MCH) was synthesized, and its removal efficiency and mechanisms in regard to natural organic matter (NOM, represented by humic acid and fulvic acid) from the aqueous environment were studied. The effects of time, adsorbent dosage, initial pH, ionic strength, background ions, and NOM types were also investigated. MCH was characterized and found to have a strong magnetic character, yielding an extra advantage for recycling and reuse. Batch studies showed that the removal of Aldrich humic acid (AHA) by MCH was effective. The main mechanism for the removal of NOM is believed to be due to electrostatic interaction. NOM with larger molecular weight tended to be preferentially removed. Solutions with low pH, high ionic strength, and background electrolytes containing calcium, sulfate and bicarbonate were unfavorable for AHA removal. The adsorption-desorption of MCH was evaluated in three cycles, and demonstrated high regeneration rates.
Authors:
Pinhua Rao; Irene M C Lo; Ke Yin; Samuel C N Tang
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-3-3
Journal Detail:
Title:  Journal of environmental management     Volume:  -     ISSN:  1095-8630     ISO Abbreviation:  -     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-3-7     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401664     Medline TA:  J Environ Manage     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011. Published by Elsevier Ltd.
Affiliation:
Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China; School of Chemistry and Chemical Engineering, Shanghai University of Engineering Science, Shanghai, China.
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