Document Detail


Arsenic rich iron plaque on macrophyte roots--an ecotoxicological risk?
MedLine Citation:
PMID:  19062145     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Arsenic is known to accumulate with iron plaque on macrophyte roots. Three to four years after the Aznalcóllar mine spill (Spain), residual arsenic contamination left in seasonal wetland habitats has been identified in this form by scanning electron microscopy. Total digestion has determined arsenic concentrations in thoroughly washed 'root+plaque' material in excess of 1000 mg kg(-1), and further analysis using X-ray absorption spectroscopy suggests arsenic exists as both arsenate and arsenite. Certain herbivorous species feed on rhizomes and bulbs of macrophytes in a wide range of global environments, and the ecotoxicological impact of consuming arsenic rich iron plaque associated with such food items remains to be quantified. Here, greylag geese which feed on Scirpus maritimus rhizome and bulb material in areas affected by the Aznalcóllar spill are shown to have elevated levels of arsenic in their feces, which may originate from arsenic rich iron plaque.
Authors:
M A Taggart; R Mateo; J M Charnock; F Bahrami; A J Green; A A Meharg
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-12-05
Journal Detail:
Title:  Environmental pollution (Barking, Essex : 1987)     Volume:  157     ISSN:  1873-6424     ISO Abbreviation:  Environ. Pollut.     Publication Date:  2009 Mar 
Date Detail:
Created Date:  2009-01-23     Completed Date:  2009-03-25     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8804476     Medline TA:  Environ Pollut     Country:  England    
Other Details:
Languages:  eng     Pagination:  946-54     Citation Subset:  IM    
Affiliation:
School of Biological Sciences, University of Aberdeen, Cruickshank Bld, St Machar Drive, Aberdeen, AB24 3UU, UK.
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MeSH Terms
Descriptor/Qualifier:
Arsenic / analysis*
Ecotoxicology / methods
Geologic Sediments / chemistry
Iron / analysis*
Plant Roots / chemistry*
Risk
Soil Pollutants / analysis*
Spain
Chemical
Reg. No./Substance:
0/Soil Pollutants; 7439-89-6/Iron; 7440-38-2/Arsenic

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


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