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Adsorption and desorption properties of D318 resin for Cr(VI)

  • Zeng-nian Shu (舒增年)Email author
  • Chun-hua Xiong (熊春华)
Article

Abstract

The adsorption capability of D318 resin for Cr(VI) was investigated by chemistry analysis. Experimental results show that D318 resin has the best adsorption ability for Cr(VI) at pH=3.16 in HAc-NaAc medium. The statically saturated adsorption capacity of the resin is 265.4 mg/g. The thermodynamic adsorption parameters, enthalpy change ΔH and free energy change ΔG298 of the adsorption reaction are 4.81 and −5.16 kJ/mol, respectively. The apparent activation energy Ea is 22.4 kJ/mol. The adsorption behavior obeys the Freundlich isotherm. The molar coordination ratio of the functional group of resin to Cr(VI) is 3:2. Cr(VI) adsorbed on D318 resin can be eluted by 5%NaOH-5%NaCl quantitatively.

Key words

Cr(VI) D318 resin adsorption desorption dynamics thermodynamics 

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Copyright information

© Central South University Press and Springer-Verlag GmbH 2009

Authors and Affiliations

  • Zeng-nian Shu (舒增年)
    • 1
    Email author
  • Chun-hua Xiong (熊春华)
    • 2
  1. 1.Department of ChemistryLishui UniversityLishuiChina
  2. 2.College of Food Science, Biotechnology and Environmental EngineeringZhejiang Gongshang UniversityHangzhouChina

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