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Soil mobility of sewage sludge-derived dissolved organic matter, copper, nickel and zinc

Ashworth, D. J. and Alloway, B. J. (2004) Soil mobility of sewage sludge-derived dissolved organic matter, copper, nickel and zinc. Environmental Pollution, 127 (1). pp. 137-144. ISSN 0269-7491

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To link to this item DOI: 10.1016/s0269-7491(03)00237-9

Abstract/Summary

A soil (sandy loam) column leaching study aimed to determine the extent of mobility and co-mobility of Cu, Ni, Zn and dissolved organic matter (DOM) released from a surface-application (equivalent to 50 t ds ha(-1)) of anaerobically-digested sewage sludge. Leaching of DOM through It the soil column was found to be almost un-retarded. Decidedly similar behaviour was exhibited by Ni suggesting that it migrated as organic complexes. Whilst Cu was also found to be leached, significant retardation was evident. However, the importance of DOM in promoting the mobility of both Cu and Ni was evidenced by their lack of mobility when added to the soil column as inorganic forms. The presence of DOM did not prevent Zn from becoming completely adsorbed by the soil solid phase. In relation to WHO drinking water guidelines, only Ni concentrations showed potential environmental significance. due to the relatively poor retention of Ni by the sludge solid phase. (C) 2003 Elsevier Ltd. All rights reserved.

Item Type:Article
Divisions:Faculty of Science > School of Archaeology, Geography and Environmental Science
Interdisciplinary centres and themes > Soil Research Centre
ID Code:3210
Uncontrolled Keywords:heavy metal leaching organic complexation dissolved organic carbon DOC sewage sludge disposal soil columns HEAVY-METALS AQUIFER MATERIAL AMENDED SOILS MOVEMENT CARBON COLUMNS BIOSOLIDS WATER ZN COMPLEXATION
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