ADSORPTION OF CHROMIUM(VI) METAL IONS FROM AQUEOUS SOLUTION USING HEXAGONAL ZnO PARTICLES: EQUILIBRIUM, KINETIC AND THERMODYNAMIC MODELLING STUDIES

作者：Erduran Nuran; Gokgoz Murat^*; Ada Kezban

来源：Canadian Journal of Chemical Engineering, 2014, 92(3): 496-502.

DOI：10.1002/cjce.21836

• chromium
• adsorption
• zinc oxide powders
• isotherms
• kinetics
• thermodynamics

Zinc oxide powders having hexagonal plate particles were prepared by homogeneous precipitation from boiling aqueous solutions that contained excess urea and 0.075 (Z075) and 0.300 (Z300) M Zn2+. The equilibrium, kinetic and thermodynamics of the adsorption of chromium (VI) from aqueous solution onto Z075 and Z300 were investigated. Thermodynamic parameters and K-# equilibrium constant of activation were calculated. Langmuir, Temkin and Dubinin-Radushkevich (D-R) isotherm models were used to describe the adsorption of Cr(VI) onto ZnO powders. The monomolecular adsorption capacity of Z075 and Z300 was determined as 980 and 1050mgg(-1) for Cr(VI), respectively.

• 出版日期2014-3