Evaluation of Different Passivators for the Immobilization of Heavy Metals Incontaminated Soils

Abstract:

The effects of hydrated lime, potassium dihydrogen phosphate, straw ash and silkworm excrement on the extractability of heavy metals, pH and organic matter content in soil were studied. The results showed that the application of the four organic-inorganic complex treatments decreased the concentration of available Pb by 22.2 to 48.9 percent, and reduced the concentration of available Cd by 29.1 to 58.4 percent, which was obviously superior to the single organic or inorganic treatments. The addition of hydrated lime had the greatest effects on soil pH, while the application of silkworm excrement significantly increased the organic matter content in soil.

• Periodical: Applied Mechanics and Materials (Volumes 409-410)
• Pages: 160-163
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.409-410.160
• Online since: September 2013
• Authors: Da Rong Li, Ying Hui Wang, Jian Hua Chen, Qiu Jun Li, Wei Sheng Wang, Wen Yu Huang, Bing Leng
• Keywords: Heavy Metal, Hydrated Lime, Organic-Inorganic Complex, Potassium Dihydrogen Phosphate, Silkworm Excrement, Straw Ash

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