ORIGINAL RESEARCH
Investigations of Chemical Fraction of Cr in Soil
J. Kalembkiewicz, E. Soco
 
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Department of Inorganic and Analytical Chemistry, Faculty of Chemistry, Rzeszow University of Technology,
Powstańców Warszawy Ave. 6, 35-959 Rzeszów, Poland
 
Pol. J. Environ. Stud. 2005;14(5):593–598
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ABSTRACT
The influence of Cr (III) and Cr (VI) on biochemical reactions in the environment depends in part on the possibility of its getting from soil to soil solutions. The various methods of sequential extraction of Cr from soil were studied (Tessier et al. [1, 2], Rudd [3], BCR [4-7], Gatehouse [8], Kersten and Förstner [9], Psenner [10], Sposito [11]) in order to characterize chemical fractions. It was found that chromium determination depends on the method used and varies from 18.2% (BCR) to 96.5% (Tessier) of chromium detection in soil (34.1 mg·kg-1). Quantitative evaluation of chemical fraction of Cr in soil by methods of sequential extraction was carried out by Tessier [1-2], Kersten and Förstner method [9] and indicated that Cr desorption increases according to the following order: exchangeable fraction <carbonate <oxide <organic (sulfide). For other procedures studied (Rudd [3], BCR [4-7], Gatehouse [8], Psenner [10], Sposito [11]), no reliable results were obtained for individual chemical fractions. The characterization of fraction of Cr soluble in water and in acids (carbonate and adsorb fractions) was performed. It was found that the Gatehouse method yielded maximum Cr amounts (25.5%) under these conditions. Their method for chromium determination is proposed for highest detectability for fractions of interest.
eISSN:2083-5906
ISSN:1230-1485