ADSORPTION OF Cr(VI) FROM AQUEOUS SOLUTION BY CHITOSAN/YTTRIUM(III) MICROSPHERES

作者：Wang Fangfang; Ge Mingqiao^*

来源：Fresenius Environmental Bulletin, 2012, 21(11C): 3481-3488.

• Biocompatible composite
• Microstructure
• Adsorption kinetics
• isotherm
• Cr(VI)

In this present study, a new biocompatible composite chitosan/yttrium(III) (Ch-Y) is investigated for the removal of Cr(VI) from aqueous solutions. The morphology and structure of the sorbent are characterized by means of Fourier transform infrared (FT-IR), X-ray diffraction (XRD), and scanning electron microscopy (SEM) and transmission electron microscope (TEM). Batch experiments are conducted to optimize the different parameters such as pH value, reaction time, and Cr(VI) initial concentration. The interaction between the surface sites of chitosan/ yttrium 010 and the Cr(VI) ions is considered as surface complexation coupled with electrostatic adsorption. The adsorption kinetics and isotherm data can be fit well with the pseudo-second-order equation and the Langmuir isotherm model, respectively. The values of thermodynamic parameters indicate that the nature of sorption is spontaneous and endothermic.

• 出版日期2012
• 单位江南大学