Remediation of certain heavy metals status in Musturud and Eigabal-Elasfar soils. I. copper and cobalt [electronic resource].

Includes references.

The aim of this work is to assess and evaluate the effect of certain amendments, i.e., ground cotton stalks, rock phosphate, K2EDT A and citric acid applied to contaminated soils at Qalubiya Governorate; namely Musturud, clay, Vertic Torrifluvents and Elgabal-Elasfar, sandy loam, T orriorthent; in soil columns experiment on the availability and mobility of Cu and Co and their transformation among the different soil fractions. All applied amendments altered concentra¬tions of Cu and Co forms in the studied soils. Application of ground cotton stalks or rock phosphate amendment to metal-contaminated soils redistributed Cu and Co from potentially available form to the more complex one; thus reducing Cu and Co solubility and bioavaila¬bility. On the other hand, K 2EDT A and/or citric a cid solubilized C u and Co !Tom relatively insoluble form indicating that these amendments have the ability to mobilize certain amounts of Cu from the upper to the lower layers of such contaminated soils. In both studied soils, ground cotton stalks were the best amendment in decreasing the DTP A-extractable Cu by about 57.4 and 55.1 %, compared to control in Musturud and Elgabal-Elasfar soils, respectively. Cobalt extractability was effectively lowered by addition of citric acid treatment; values being 64.7and 50.8%, compared to control in Musturud and Elgabal¬Elasfar soils, respectively. Copper concentration was in the normal range for shoots of broud bean grown on Musturud soil, 'whereas that for Elgabal-Elasfar sod was higher than the normal range, except for ground cotton stalks and rock phosphate treatments. Cobalt concentration in plant shoots was excessive either for treated or untreated soils

Summary in Arabic.

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