Adsorption character for removal Cu(II) by magnetic Cu(II) ion imprinted composite adsorbent

作者：Ren Yueming^*; Wei Xizhu; Zhang Milin

来源：Journal of Hazardous Materials, 2008, 158(1): 14-22.

DOI：10.1016/j.jhazmat.2008.01.044

• magnetic adsorbent
• Cu(II) ion imprinted
• adsorption
• heavy metals

A novel magnetic Cu(II) ion imprinted composite adsorbent (Cu(II)-MICA) was synthesized. characterized and applied for the selective removal Cu(II) from aqueous solution in the batch system. The adsorption-desorption and selectivity characteristics were investigated. The maximum adsorption occurred at pH 5-6. The equilibrium time was 6.0 h, and a pseudo-second-order model could best describe adsorption kinetics. The adsorption equilibrium data fit Langmuir isotherm equation well with a maximum adsorption capacity of 46.25 mg/g and Langmuir adsorption equilibrium constant of 0.0956 L/mg at 298 K. Thermodynamic parameters analysis predicted an exothermic nature of adsorption and a spontaneous and favourable process that could be mainly governed by physisorption mechanism. The relative selectivity coefficients of Cu(II)-MICA for Cu(II)/Zn(II) and Cu(II)/Ni(II) were 2.31, 2.66 times greater than the magnetic non-imprinted composite adsorbent (MNICA). Results suggested that Cu(II)-MICA was a material of efficient, low-cost, convenient separation under magnetic field and could be reused five times with about 14% regeneration loss.

• 出版日期2008-10-1
• 单位哈尔滨工业大学; 哈尔滨工程大学