Using Regional Characteristic Amendments to Modify Heavy Metal Contaminated Soil of Guangxi, South China

Qiu Jun Li; Rui Jie Zhang; Ying Hui Wang; Da Rong Li

doi:10.4028/www.scientific.net/AMM.675-677.654

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 675-677Using Regional Characteristic Amendments to Modify...

Using Regional Characteristic Amendments to Modify Heavy Metal Contaminated Soil of Guangxi, South China

Abstract:

In this study we compared the efficiency of four kinds of amendments (silkworm excrement, coconut husk, red mud, sepiolite) and their mixtures to immobilize the heavy metals present in a contaminated acidic soil (Pb:420 mg ·kg⁻¹ ; Zn :334 mg· kg⁻¹) and to influence several enzymatic activities. The results showed that, silkworm excrement, coconut husk and their mixtures, which had high pH and/or high content of organic matter, reduced exchangeable Pb in the soil by 18% to 46%, and reduced available Zn by 24% to 35%, which was more efficacious than single sepiolite. The complex of silkworm excrement and red mud had a great influence on soil pH, while coconut husk increased the content of organic matter in soil significantly.

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Periodical:

Applied Mechanics and Materials (Volumes 675-677)

Pages:

654-657

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.675-677.654

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Online since:

October 2014

Authors:

Qiu Jun Li, Rui Jie Zhang, Ying Hui Wang, Da Rong Li

Keywords:

Coconut Husk, Enzymatic Activities, Red Mud, Sepiolite, Silkworm Excrement

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