A novel adsorbent of Na2Ta2O6 porous microspheres with F- gradient concentration distribution: High cationic selectivity and well-regulated recycling

作者：Liu, Xiaoqing; Huang, Shushu; Su, Yiguo; Chai, Zhanli; Zhai, Hao; Wang, Xiaojing^*

来源：Journal of Hazardous Materials, 2014, 265: 226-232.

DOI：10.1016/j.jhazmat.2013.11.062

• F- gradient concentration
• Tantalate
• Cationic dyes
• Adsorption
• Regeneration
• Thermodynamic parameters

Pyrochlore Na2Ta2O6 porous microspheres with F- gradient concentration distribution were first prepared, which showed an excellent selectivity toward cationic dyes as an adsorbent. These dyes were regenerated rapidly by adding to NaAc solution. After then, the adsorbent still showed a high adsorption capacity. Optionally, the effective recycling of the adsorbents was achieved by UV light illumination, free of secondary environmental contamination. The rate of adsorption reaction followed the pseudo second-order kinetics, and the sorption isotherm well fitted to the Freundlich isotherm model. Eventually, the adsorption reaction for the absorbents was found to be a spontaneous and endothermic process.

• 出版日期2014-1-30
• 单位内蒙古大学