Document Detail


Particle-facilitated lead and arsenic transport in abandoned mine sites soil influenced by simulated acid rain.
MedLine Citation:
PMID:  18329689     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The role of acid rain in affecting Pb and As transport from mine tailings was investigated by pumping simulated acid rain at a infiltration rate of 10.2 cm/h through soil columns. Simulated acid rain with pH of 3.0, 4.5 and 5.6 were used as leaching solutions. Results showed that 86.9-95.9% of Pb and 90-91.8% of As eluted from the columns were adsorbed by particles in the leachates. Scanning electron microscopy (SEM) analysis showed that particles released from the columns were mainly composed of flocculated aggregates and plate or rod shaped discrete grains. Transmission electron microscopy (TEM) coupled with energy dispersive X-ray analysis (EDX) showed that these particles were predominantly silicate minerals. Results from our experiments demonstrated that when rapid infiltration conditions or a rainstorm exist, particle-facilitated transport of contaminants is likely to the dominant metal transport pathway influenced by acid rain.
Authors:
Hu Shaoping; Chen Xincai; Shi Jiyan; Chen Yingxu; Lin Qi
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-03-10
Journal Detail:
Title:  Chemosphere     Volume:  71     ISSN:  0045-6535     ISO Abbreviation:  Chemosphere     Publication Date:  2008 May 
Date Detail:
Created Date:  2008-04-28     Completed Date:  2008-07-15     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0320657     Medline TA:  Chemosphere     Country:  England    
Other Details:
Languages:  eng     Pagination:  2091-7     Citation Subset:  IM    
Affiliation:
Department of Environmental Engineering, Zhejiang University, Hangzhou 310029, PR China.
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MeSH Terms
Descriptor/Qualifier:
Acid Rain / analysis*
Arsenic / analysis,  chemistry*
Lead / analysis,  chemistry*
Microscopy, Electron, Transmission
Mining*
Soil Pollutants / analysis,  chemistry*
Water Pollutants, Chemical
Chemical
Reg. No./Substance:
0/Acid Rain; 0/Soil Pollutants; 0/Water Pollutants, Chemical; 7439-92-1/Lead; 7440-38-2/Arsenic

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


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