Document Detail


Influence of sediment metal spiking procedures on copper bioavailability and toxicity in the estuarine bivalve Indoaustriella lamprelli.
MedLine Citation:
PMID:  19335027     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The effect of three methods for spiking sediments with Cu on the reburial behavior, mortality, and tissue Cu accumulation of a lucinid bivalve (Indoaustriella lamprelli) and the influence of the bivalve on the sediment geochemistry were investigated. Methods used to create Cu concentration gradients were direct spiking with and without pH adjustment to pH 7 and also dilution of sediment, previously spiked with Cu and adjusted to pH 7, using a low-Cu sediment (known to produce the lowest pore-water Cu concentrations). The presence of the bivalve within Cu-spiked sediment increased the flux of Cu and Mn to overlying waters at high Cu concentrations (550 microg/g). Bivalve behavioral response, metal accumulation, and mortality varied with the method by which Cu was spiked. In direct Cu-spiked sediment, the bivalves were inactive at concentrations of 550 and 1,100 microg/g, with mortality induced in sediment spiked with 1,100 microg/g (pH 6.5-7.1). Complete bivalve inactivity was observed only at 1,100 microg/g in direct Cu-spiked sediment with pH adjustment, whereas percentage reburial was reduced to 30% at 1,100 microg/g for sediment prepared by the dilution method. Relative reburial rates in the three spiked sediment types (direct << direct pH-7 < dilution) were proportional to dissolved Cu concentrations in the overlying water. Bivalve reburial, in addition to the method of Cu addition, affected tissue Cu accumulation. Inhibition of bivalve reburial decreased the amount of accumulated Cu, confounding relationships between tissue Cu and pore water, overlying water, or extractable metal fractions.
Authors:
Colin M Hutchins; Peter R Teasdale; Shing Y Lee; Stuart L Simpson
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Environmental toxicology and chemistry / SETAC     Volume:  28     ISSN:  0730-7268     ISO Abbreviation:  Environ. Toxicol. Chem.     Publication Date:  2009 Sep 
Date Detail:
Created Date:  2009-11-24     Completed Date:  2009-12-08     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8308958     Medline TA:  Environ Toxicol Chem     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1885-92     Citation Subset:  IM    
Affiliation:
Australian Rivers Institute, Griffith University, Queensland, Australia. colin.hutchins@umontreal.ca
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MeSH Terms
Descriptor/Qualifier:
Animals
Biological Availability
Bivalvia / drug effects*,  metabolism
Copper / pharmacokinetics*,  toxicity*
Dose-Response Relationship, Drug
Geologic Sediments / analysis*
Hydrogen-Ion Concentration
Oxidation-Reduction
Water Pollutants, Chemical / analysis,  pharmacokinetics*,  toxicity*
Chemical
Reg. No./Substance:
0/Water Pollutants, Chemical; 7440-50-8/Copper

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


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