Document Detail


Movement and bioaccumulation of chromium in an artificial freshwater ecosystem.
MedLine Citation:
PMID:  17569292     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
In the present study, a small fresh water aquatic ecosystem was created into a small test tank to evaluate the movement and bioaccumulation of Cr (VI) through water, sediment, a macrophyte Hydrilla, small fish guppy, and few key organs of magur, Clarias batrachus. The Cr (VI) intoxication was imposed of as a single dose of 30 mg/l concentration for a wide range of exposure durations like 1, 7, 14 and 21 days. After 1 day of exposure the total Cr (VI) load was very high in the water and sediment samples (5.187 microg/ml and 23.332 microg/g respectively) which were decreased with increasing exposure durations over their respective controls. In samples of macrophyte, Cr (VI) concentration showed a gradual increasing trend from 6.1797 microg/g in control to 21.1903 microg/g in 1 day exposure and reached up to 24.635 microg/g after 21 days exposure. In guppy, the Cr (VI) bioaccumulation showed an increasing trend but the rate was not statistically significant. However, in magur, the Cr (VI) uptake showed a significant gradual and increasing trend with increasing exposure durations in liver, brain, intestine and muscular tissues than gill and kidney over their respective controls. The movement of the Cr (VI) was found to be from sediment to water during pre-treatment phase, after intoxication, from water to macrophyte and to other phytoplankton and zooplankton. It then accumulated in the primary consumer guppy and finally moved to the secondary consumer the magur following the food web. The results reveal that the rate of movement and bioaccumulation of Cr (VI) varied from organism to organism and in C. batrachus, from tissue to tissue.
Authors:
Jignesh Ramoliya; Ashish Kamdar; Rahul Kundu
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Indian journal of experimental biology     Volume:  45     ISSN:  0019-5189     ISO Abbreviation:  Indian J. Exp. Biol.     Publication Date:  2007 May 
Date Detail:
Created Date:  2007-06-15     Completed Date:  2007-08-13     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0233411     Medline TA:  Indian J Exp Biol     Country:  India    
Other Details:
Languages:  eng     Pagination:  475-9     Citation Subset:  IM    
Affiliation:
Department of Biosciences, Saurashtra University, Rajkot 360 005, India.
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MeSH Terms
Descriptor/Qualifier:
Animals
Catfishes / metabolism
Chromium / analysis*,  pharmacokinetics
Ecosystem*
Fresh Water / analysis*
Geologic Sediments / analysis
Hydrocharitaceae / chemistry
Models, Biological*
Osmolar Concentration
Poecilia / metabolism
Tissue Distribution
Water Movements*
Water Pollutants, Chemical / analysis,  pharmacokinetics
Chemical
Reg. No./Substance:
0/Water Pollutants, Chemical; 7440-47-3/Chromium

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


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