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Behaviour of heavy metals in domestic sewage sludge amended into soil


, : Behaviour of heavy metals in domestic sewage sludge amended into soil. Japanese Journal of Soil Science and Plant Nutrition 67(1): 24-31

Experiments were carried out to determine the behaviour of heavy metals in sewage sludge applied to the soil surface. The results showed: (1) domestic sewage sludge contained 0.25-0.30 kg/kg of organic matter as total carbon. The average Cd content was 3.4 mg/kg, and Cu and Zn were > 1000 mg/kg; (2) the solubility of heavy metals in the sewage sludge in acid solution was in the order Zn > Pb > Cd > Cu, and 65% of total Zn was the acid-soluble form.

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