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Study on Process Parameter of Ethyl Violet by Activated Carbon Adsorption

활성탄 흡착에 의한 Ethyl Violet의 공정 파라미터 연구

  • Lee, Jong-Jib (Division of Chemical Engineering, Kongju National University)
  • 이종집 (공주대학교 화학공학부)
  • Received : 2018.12.10
  • Accepted : 2018.12.26
  • Published : 2018.12.31

Abstract

The process parameters of ethyl violet from aqueous solution by activated carbon adsorption were carried out as a function of pH, temperature, contact time, initial concentration and temperature. The adsorption equilibrium data can be described well by the Langmuir and Freundlich isotherm models. Base on Langmuir constant ($R_L=0.0343{\sim}0.0523$) and Freundlich constant (1/n=0.1633~0.1974), This process could be employed as effective treatment for adsorption of ethyl violet. The kinetic experimental results showed that the adsorption process can be well described with the pseudo second order model. Based on the positive enthalpy (6.505 kJ/mol), the adsorption of ethyl violet onto granular activated carbon is endothermic. The negative Gibbs free energy (-1.169~-1.681 kJ/mol) obtained indicates that the adsorption process is spontaneous and physisorption.

Keywords

References

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