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MARC Record
Bibliographic Data
Control Number
309827
Date and Time of Latest Transaction
20150706095034.AM
General Information
150706s |||||||||b ||00|||
Cataloging Source
STII-DOST
Local Call Number
ScienceDirect
Main Entry - Personal Name
Barral, M.T.
Diaz-Fierros, F.
Devesa-Rey, R.
Title Statement
Trace metals in river bed sediments An assessment of their partitioning and bioavailability by using multivariate exploratory analysis by R. Devesa-Rey, F. Diaz-Fierros and M.T. Barral
Physical Description
pages 2471-2477 computer file; text; 621kb
Summary, Etc.
In this study, river bed sediments were submitted to a BCR sequential extraction, together with three bioavailability tests: a weak acid elutriate (HCl), a physiologically based extraction test (PBET) and a toxicity characteristic leaching procedure (TCLP). The most remarkable features of the BCR procedure were: i) Mn and Zn showed the highest proportion of the F1 exchangeable fraction; ii) in addition to Fe, Pb and Zn were the metals with the higher percentages in the F2 reducible fraction; iii) Fe and Cu were the elements with the highest proportion of the F3 oxidizable fraction; iv) the application of Principal Component Analysis to the metals in each of the three fractions did not show clear associations between metals and sediment components considered as metal scavengers, v) considering the sum of the three BCR fractions, the elements showed a decreasing availability of: Fe > Pb > Zn > Cu > Mn > Ni > Cr. The single extractions followed a decreasing extractability order of: HCl > PBET > TCLP and they were far from the extractability deduced from the sum of fractions in the BCR extraction
Subject Added Entry - Topical Term
Engineering
Biological Availability
Chemical Fractionation
Geologic Sediments -- Analysis
Multivariate Analysis
Location
DOST STII ScienceDirect NONPRINTS NP 13-14791 1 13-14791 Online/Download 2010-11-30
Physical Location
Department of Science and Technology
Science and Technology Information Institute
ScienceDirect
Digital Copy
Not Available
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