Document Detail

Copper distribution in water-dispersible colloids of swine manure and its transport through quartz sand.
MedLine Citation:
PMID:  21251753     Owner:  NLM     Status:  Publisher    
To demonstrate the potential risks associated with the application of solid agricultural wastes, we investigated Cu distribution in water-dispersible colloids derived from swine manure and its transport through quartz sand. Samples were sequentially centrifuged to obtain five colloid suspensions (<10, <1, <0.45, <0.2, and <0.02μm) and four colloid subsamples (1-10, 0.45-1, 0.2-0.45, and 0.02-0.2μm). We observed that 2% of Cu in the swine manure was found in the 0.02-10μm colloid fractions, while 18% was observed in the <0.02μm colloid suspension. The highest accumulation of Cu was found in the 0.02-0.2μm fraction of colloids, in which organic carbon was the major component. The Cu in the 1-10μm colloid fraction existed in both inorganic compounds and organic associations, whereas it mainly existed as organic complexes in colloids <1μm (<0.53μm, specifically). Furthermore, large colloids (1-10μm) of swine manure were partially filtered out as they passed through the sand particles, and fine colloids facilitated the transport of Cu. The formation of organic complexes was hypothesized to enhance the mobility of Cu. Further research is needed to incorporate our experimental findings into a realistic model of particle mobilization and transport through soil or groundwater aquifers.
Qibei Bao; Qi Lin; Guangming Tian; Guihao Wang; Jian Yu; Guiqun Peng
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2010-12-17
Journal Detail:
Title:  Journal of hazardous materials     Volume:  -     ISSN:  1873-3336     ISO Abbreviation:  -     Publication Date:  2010 Dec 
Date Detail:
Created Date:  2011-1-21     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9422688     Medline TA:  J Hazard Mater     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2010 Elsevier B.V. All rights reserved.
Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, PR China.
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