KINETIC AND ISOTHERM STUDY OF CUPPER ADSORPTION FROM AQUEOUS SOLUTION USING WASTE EGGSHELL


Creative Commons License

Polat A., Asian S.

JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT, cilt.22, ss.132-140, 2014 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 22 Konu: 2
  • Basım Tarihi: 2014
  • Doi Numarası: 10.3846/16486897.2013.865631
  • Dergi Adı: JOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT
  • Sayfa Sayıları: ss.132-140

Özet

The sorption of Cu2+ ions from aqueous solutions by eggshell was investigated in a batch experimental system with respect to the temperature, initial Cu2+. concentrations, pH, and biosorbent doses. The adsorption equilibrium was well described by the Langmuir isotherm model with the maximum adsorption capacity of 5.05 mg Cu2+/g eggshell at 25 degrees C. The value of q(e) increased with increasing the temperature while also increases the release of Ca2+ and HCO3-, ions from the eggshell. The highest sorption of Cu2+ onto the waste eggshell was determined at the initial pH value of 4.0. The results confirming that the adsorption reaction of Cu2+ on the eggshell was thought to be endothermic. A comparison of the kinetic models such as pseudo first and second-order kinetics, intrapartide diffusion, and Elovich on the sorption rate demonstrated that the system was best described by the pseudo second-order kinetic model.