Adsorptive removal studies of lead(II) ions using functionalized silica

Journal of Water Reuse and Desalination

Abraham, Thomas N.¹  Kumar, Rajesh¹  Jain, S. K.¹ 

[1] Water Quality Management Group, Desert Environmental Science and Technology Division, Defence Laboratory, Ratanada Palace, Jodhpur 342011 (RAJ), India

关键词: functionalized silica;    heavy metal removal;    2-hydroxyacetophenone-3-thiosemicarbazone;    isotherms;    lead;   

DOI  :  10.2166/wrd.2011.020

学科分类：工程和技术（综合）

来源: IWA Publishing

【 摘 要 】

An adsorbent was prepared by the functionalization of 2-hydroxyacetophenone-3-thiosemicarbazone onto 3-aminopropyl silica by diazotation and characterized by Fourier transmission infra red spectrometry. The functionalized silica was evaluated for removal of lead(II) ions in aqueous solutions. The maximum adsorption capacity 385 μg/g was obtained with an initial concentration of 1,000 μg/L by the Langmuir isotherm. The results indicated that adsorption data could be fitted better by the Langmuir than the Freundlich isotherm. The adsorption kinetics followed pseudo-second-order reaction and the rate constants of kinetic model were calculated. The experimental results implied that functionalized silica has the potential to work as a good adsorbent for the removal of the heavy metals from contaminated water. This novel adsorbent was found to be easy to synthesize, simple, cost-effective and highly efficient and has potential application in the water purification field.

【 授权许可】

CC BY-NC-ND