Document Detail


Effects of fulvic acid and humic acid on aluminum speciation in drinking water.
MedLine Citation:
PMID:  20397408     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This article focused on the influences of fulvic acid and humic acid on aluminum speciation in drinking water. Factors including the concentration of residual chlorine and pH value had been concerned. Aluminum species investigated in the experiments included inorganic mononuclear, organic mononuclear, mononuclear, polymer, soluble, and suspended forms. It was found that the effects of fulvic acid and humic acid on aluminum speciation depended mainly on their molecular weight. Fulvic acid with molecular weight less than 5000 Dalton had little influence on aluminum speciation; while fulvic acid with molecular weight larger than 5000 Dalton and humic acid would increase the concentration of soluble aluminum significantly even at concentration below 0.5 mg/L (calculated as TOC). Aluminum species, in the present of fulvic acid with molecular weight larger than 5000 Dalton and humic acid, were more stable than that in the present of fluvic acid with molecular mass less than 5000 Dalton, and varied little with reaction time. Within pH range 6.5-7.5, soluble aluminum increased notably in water with organic matter. As the concentration of residual chlorine increased, the effects of fulvic acid and humic acid became weak. The reactions between humic acid, fulvic acid with large molecular weight, and aluminum were considered to be a multi-dentate coordination process. With the consideration of aluminum bioavailability, reducing the concentration of fulvic acid and humic acid and keeping the pH value among 6.5-7.5 were recommended during drinking water treatment.
Authors:
Wendong Wang; Hongwei Yang; Xiaochang Wang; Jing Jiang; Wanpeng Zhu
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of environmental sciences (China)     Volume:  22     ISSN:  1001-0742     ISO Abbreviation:  J Environ Sci (China)     Publication Date:  2010  
Date Detail:
Created Date:  2010-04-19     Completed Date:  2010-05-04     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100967627     Medline TA:  J Environ Sci (China)     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  211-7     Citation Subset:  IM    
Affiliation:
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. wwd@xauat.edu.cn
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MeSH Terms
Descriptor/Qualifier:
Aluminum / chemistry*
Benzopyrans / chemistry*
Chlorine
Humic Substances / analysis*
Hydrogen-Ion Concentration
Water Supply / analysis*
Chemical
Reg. No./Substance:
0/Benzopyrans; 0/Humic Substances; 479-66-3/fulvic acid; 7429-90-5/Aluminum; 7782-50-5/Chlorine

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


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