Effect of sewage sludge or compost on the sorption and distribution of copper and cadmium in soil

The application of biosolids such as sewage sludge is a concern, because of the potential release of toxic metals after decomposition of the organic matter. The effect of application of sewage sludge (Sw) and compost (C) to the soil (S) on the Cu and Cd sorption, distribution and the quality of the...

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Bibliographic Details
Published in:Waste management (Elmsford) 2006-01, Vol.26 (1), p.71-81
Main Authors: Vaca-Paulín, R., Esteller-Alberich, M.V., Lugo-de la Fuente, J., Zavaleta-Mancera, H.A.
Format: Article
Language:English
Subjects:
ABSORPTION SPECTROSCOPY
Adsorption
Applied sciences
Biological and physicochemical properties of pollutants. Interaction in the soil
Biological Availability
CADMIUM
Cadmium - chemistry
Chemical Fractionation
COMPOST
COPPER
Copper - chemistry
DECOMPOSITION
Exact sciences and technology
Fertilizers
Hydrogen-Ion Concentration
INFRARED SPECTRA
INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY
ISOTHERMS
ORGANIC MATTER
Pollution
Sewage
SEWAGE SLUDGE
Soil
Soil and sediments pollution
Soil Pollutants
SOILS
SORPTION
SPECTROPHOTOMETRY
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Summary:The application of biosolids such as sewage sludge is a concern, because of the potential release of toxic metals after decomposition of the organic matter. The effect of application of sewage sludge (Sw) and compost (C) to the soil (S) on the Cu and Cd sorption, distribution and the quality of the dissolved organic matter (DOM) in the soil, was investigated under controlled conditions. Visible spectrophotometry, infrared spectroscopy, sorption isotherms (simple and competitive sorption systems), and sequential extraction methods were used. The E 4/ E 6 ( λ at 465 and 665 nm) ratio and the infrared spectra (IR) of DOM showed an aromatic behaviour in compost–soil (C–S); in contrast sewage sludge–soil (Sw–S) showed an aliphatic behaviour. Application of either Sw or C increased the Cu sorption capacity of soil. The Cd sorption decreased only in soil with a competitive metal system. The availability of Cu was low due to its occurrence in the acid soluble fraction (F3). The Cu concentration varied in accordance with the amounts of Cu added. The highest Cd concentration was found in the exchangeable fraction (F2). The Sw and C applications did not increase the Cd availability in the soil.
ISSN:0956-053X
1879-2456
DOI:10.1016/j.wasman.2005.03.008