Pedosphere 12(2): 139--144, 2002
ISSN 1002-0160/CN 32-1315/P
©2002 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Extractability of Cu in alkaline biosolids-amended soils as influenced by γ-irradiation |
| LUO Yong-Ming1 and P. CHRISTIE2 |
1 Institute of Soil Science, the Chinese Academy of Sciences, Nanjing 210008 (China);
2 Department of Agricultural and Environmental Science, The Queen's University of Belfast, Newforge LaneBelfast, BT9 5PX (UK) |
| ABSTRACT |
| An incubation experiment was conducted to investigate the microbial biomass associated Cu in four contrasting soils to which an alkaline stabilised sewage sludge cake was applied. The organisms of sludge-amended and control soils were killed using γ-irradiation technique, and the aqueous and acid-extractable Cu concentrations were determined. Addition of the sludge product increased significantly the concentration of both the aqueous and dilute HOAc-extractable Cu in all the irradiated soils compared to the non-sterilisedsludge/soil mixtures, but the increase was more pronounced in the dilute acid-extractable Cu, indicating thatthe Cu rendered extractable in water and dilute acetic acid by γ-irradiation existed in the both soil liquidand solid phases. The additional increase in extractable Cu following the biocidal treatment is likely to bedue to release of Cu from the same fraction of soil microbial biomass. |
| Key Words: acetic acid extract, aqueous extract, γ-irradiation, soil biomass copper |
| Citation: Luo, Y. M. and Christie, P. 2002. Extractability of Cu in alkaline biosolids-amended soils as influenced by γ-irradiation. Pedosphere. 12(2): 139-144. |
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