摘要 |
PURPOSE: Provided is an elution preventing composition that is made by mixing materials such as quick lime, surface active agent, ferric chloride, apatite and zeolite is provided to treat hazardous materials such as sewage sludge including heavy metals, waste oil and organic solvent effectively. CONSTITUTION: The elution preventing composition comprises 20-60 wt.% of quick lime, 10-50 wt.% of surfactant-coated quick lime, 10-30 wt.% of ferric chloride, 10-20 wt.% of apatite and 10-20 wt.% of zeolite. The surfactant is copolymeric nonionic surfactant such as polyoxyethylene nonylphenyl ether. The surfactant-coated quick lime consists of 20-30 wt.% of surfactant and 70-80 wt.% of quick lime. For solidification/stabilization of hazardous materials, the elution preventing composition is mixed with hazardous materials within the ratio of 1:0.3 to 1.5, and water is added to the mixture in an amount of 10 to 35 wt.%, based on the weight of the elution preventing composition.
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