Study on the Adsorption-Desorption Behavior of Cr in Soil as Affect by Zeolite

Abstract:

Under laboratory simulation experimental model, through adding exogenous chromium and CaCl₂ solution, we research adsorption, desorption characteristics of Cr in soils with or without fixative (zeolite). Research shows that: The soil with zeolite can increase adsorption capacity of soil for Cr, it can also reduce the desorption quantity of Cr. In thermodynamics experiment, Freundlich equation is one of the best model to describe adsorption、desorption characteristics for Cr in soil with or without zeolite.; In kinetics experiment, adding zeolite to soil could increase adsorption rate for Cr and decrease the desorption rate for Cr ,we could use Elovich equation to describe adsorption、desorption characteristics of soils with or without zeolite for Cr.

• Periodical: Advanced Materials Research (Volume 414)
• Pages: 32-38
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.414.32
• Online since: December 2011
• Authors: Xin Ke, Guang Zhen Xu, Lin Lin Niu, Xin Zhao, Run Dong Li, Yun Zhang
• Keywords: Adsorption-Desorption, Heavy Metal, Kinetic, Thermodynamic, Zeolite

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