ISSN:
1573-2932
Keywords:
complexation capacity
;
metal retention
;
organic component
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
Notes:
Abstract Four soils contaminated by Pb-Zn mining, Pb-Zn smelting, sewage sludge application, and clay pigeon shooting, respectively, were evaluated for their ability to attenuate relatively high concentrations of supplied Cd and Pb. The retention characteristics of the polluted soils and ‘background’-unpolluted soils for Cd and Pb, were assessed by batch adsorption experiments and equilibrium dialysis titration of the soil organic component. From the sorption data it was observed that the mining polluted and sewage sludge treated soils showed no significant change in Cd affinity when compared to the unpolluted soils. However, for Pb, the reduction in the slopes in the isotherms of the sludge treated and shot over soils were significant when compared to the background soils – indicating a reduced affinity for Pb. The Cd and Pb complexation capacities of the organic component were reduced in the mining, smelter and shot over soil compared to their respective background soils. However, the complexation capacity for Cd of the sludged soil increased from 1.01 µmol Cd g-1 of organic matter to 4.38 µmol Cd g-1 of organic compared to the background soil, but, the stability constant of the organo-metal complex formed was lower (6.05 cf. 6.85).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1018363812674
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