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Volume 5, 2010 - Number 2
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ADSORPTION OF COPPER ON THE ILLUVIATION AND ACCUMULATION HORIZONS OF A LUVISOL
Tibor NÉMETH1, Péter SIPOS1, Réka BALÁZS2, Zoltán SZALAI3, Erzsébet MÉSZÁROS3 & Mária DI GLÉRIA3
1Institute for Geochemical Research, Hungarian Academy of Sciences, Budaörsi út 45, 1112 Budapest, Hungary e-mail: ntibi@geochem.hu 2Eötvös Loránd University, Pázmány Péter sétány 2/a, 1117 Budapest, Hungary 3Geographical Research Institute, Hungarian Academy of Sciences, Budaörsi út 45, 1112 Budapest, Hungary ADSORPTION OF COPPER ON THE ILLUVIATION AND ACCUMULATION HORIZONS OF A LUVISOL Full text
Abstract:
Copper adsorption capacity of the illuviation (E) and accumulation (B) horizons of a Luvisol profile was studied in high ionic strength NaCl solution and at pH 4-5. The maximum copper adsorption calculated by Langmuir equation was 0.052 mol/kg Cu (3 304 mg/kg Cu) for the E horizon, and 0.071 mol/kg (4 512 mg/kg) Cu for the B horizon. The differences arise from the different mineral composition of the distinct horizons. Hydrous iron oxides and swelling chlorite/vermiculite in the accumulation layer increase Cu adsorption capacity, while hydroxy-interlayering in vermiculite, and absence of iron oxides decrease Cu uptake of the eluviated horizon. Based on XRD studies, measurable fraction of Cu was sorbed in the interlayer space of vermiculite by ion exchange mechanism. This adsorbed Cu caused the loss of expansion capacity of the vermiculite
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