J. Nouri
Department of Environmental Health Engineering, School of Public Health, University of Tehran
B. J. Alloway
Department of Soil Science,
University of Reading, Whiteknights, P.O.Box 233, Reading, RG6 6DW, U.K
P. J. Peterson
Kings College London, Strand, London WC2R 2LS, England, U.K
ABSTRACT
A sludge was conducted to attain the chemical extractability and mobility of Ni63 in soil and sludge. The results of this sludge showed a variation in extractable Ni63 activity with different incubation times. The extractions from the spread columns within increase in time showed, the amount of water soluble Ni63 in the soil, sludge and soil mixtures decreased significantly. The percentage removal of organically bound Ni63 by DTPA varied during the eight weeks, while EDTA showed a higher percentage of removal with a correlation with plant uptake. In some cases water decreased the solubility of Ni63 with increasing time in soil, sludge and mixture columns. Organic matter also decreased the Ni63 concentrations in all mixtures. Nitric acid digestion was used as a method of total recovery of Ni63 from all columns and 86-94% of the initial Ni63 was recovered in leachates from the soil and soil/sludge mixtures a greater proportion of cationic species of Ni63 than non cationic special were present, but in the sludge only leachates the reverse was true after 8 weeks. Organic matter content of soil increased by incorporation of sewage sludge may help to reduce the mobility of nickel.
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How to cite this article
J. Nouri, B. J. Alloway and P. J. Peterson, 2001. The Chemical Extractability and Mobility of Ni63 in Soil and Sludge. Journal of Biological Sciences, 1: 976-985.
DOI: 10.3923/jbs.2001.976.985
URL: https://scialert.net/abstract/?doi=jbs.2001.976.985
DOI: 10.3923/jbs.2001.976.985
URL: https://scialert.net/abstract/?doi=jbs.2001.976.985
REFERENCES
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CrossRefDirect Link - Page, A.L. and P.F. Pratt, 1975. Effects of sewage sludge or effluent application to soil on the movement of nitrogen, phosphorus, soluble salts and trace elements to ground waters. Proceedings of the 2nd National Conference on Municipal Sludge Management and Disposal, (MSMD'75), Anaheim, California, pp: 179-187.