Soil humic acids may favour the persistence of hexavalent chromium in soil

Leita, L.; Arcon, I.; Mosetti, D.; Pastrello, A.; Margon, A.; Contin, M.

doi:10.1016/j.envpol.2009.01.020

Journal Article

Soil humic acids may favour the persistence of hexavalent chromium in soil

Leita, L. ; Margon, A. ; Pastrello, A. ; Arcon, I. ; Contin, M. ; Mosetti, D. ; DESY

2009
Elsevier Science Amsterdam [u.a.]

Environmental pollution 157, 1862-1866 (2009) [10.1016/j.envpol.2009.01.020]

This record in other databases:

Please use a persistent id in citations: doi:10.1016/j.envpol.2009.01.020

Abstract: The interaction between hexavalent chromium Cr(VI), as K(2)CrO(4), and standard humic acids (HAs) in bulk solution was studied using three complementary analytical methods: UV-Visible spectroscopy, X-ray absorption spectroscopy and differential pulse stripping voltammetry. The observed UV-Vis and X-ray absorption spectra showed that, under our experimental conditions, HAs did not induce reduction of Cr(VI) to its trivalent chemical form. The interaction between Cr(VI) and HAs has rather led to the formation of Cr(VI)-HAs micelles via supramolecular chemical processes. The reported results could contribute towards explaining the relative persistence of ecotoxic hexavalent chromium in soils.

Keyword(s): Absorptiometry, Photon: methods (MeSH) ; Chromium: analysis (MeSH) ; Chromium: chemistry (MeSH) ; Ecotoxicology: methods (MeSH) ; Electrochemistry: methods (MeSH) ; Humic Substances (MeSH) ; Hydrogen-Ion Concentration (MeSH) ; Soil: analysis (MeSH) ; Soil Pollutants: analysis (MeSH) ; Soil Pollutants: chemistry (MeSH) ; Spectrophotometry, Ultraviolet: methods (MeSH) ; Time Factors (MeSH) ; Humic Substances ; Soil ; Soil Pollutants ; chromium hexavalent ion ; Chromium