Role of free radicals in the binding of organochlorine pesticides and heavy metals with humic acid

The formation of soluble complexes between humic acid (HA) and γ-HCH or different metals (Ca, Cr, Mn, Fe, Co, Ni, Cu, Zn,Pb, Cd, As and Mg) was studied, along with any generation of free radicals by electron spin resonance spectroscopy. Free radical generation was noticed in case of interaction of h...

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Veröffentlicht in:	The Science of the total environment 1999-07, Vol.231 (2), p.125-133
Hauptverfasser:	Pandey, A.K, Pandey, S.D, Misra, V, Viswanathan, P.N
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Biological and physicochemical properties of pollutants. Interaction in the soil Earth sciences Earth, ocean, space Electron spin resonance spectroscopy Engineering and environment geology. Geothermics Exact sciences and technology Free radical Humic acid Hyperfine splitting Pollution Pollution, environment geology Soil and sediments pollution Soluble complexes γ-Hexachlorocyclohexane
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Beschreibung
Zusammenfassung:	The formation of soluble complexes between humic acid (HA) and γ-HCH or different metals (Ca, Cr, Mn, Fe, Co, Ni, Cu, Zn,Pb, Cd, As and Mg) was studied, along with any generation of free radicals by electron spin resonance spectroscopy. Free radical generation was noticed in case of interaction of humic acid with γ-HCH, Cu and Cr. A hyperfine splitting pattern was noticed only in case of Mn. However, with Ca, Cd, Pb, As, Ni, Co, Zn and Fe, neither free radicals were generated nor hyperfine splitting was observed. The possible significance of free radicals in the binding of environmental pollutants with humic acid is discussed together with ecotoxicological implications.
ISSN:	0048-9697 1879-1026
DOI:	10.1016/S0048-9697(99)00090-X