Removal of Zn2+, Cd2+ e Pb2+ ions from aqueous solutions by magnetic composite of zeolite from coal ashes

Química Nova

Yamaura, Mitiko¹  Instituto de Pesquisas Energéticas e Nucleares, São Paulo, Brasil¹  Graciano, José Eduardo Alves¹  Fungaro, Denise Alves¹ 

关键词: coal fly ash;    zeolite;    magnetic composite.;   

DOI  :  10.1590/S0100-40422010000600011

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

For this study, magnetic composite of zeolite-magnetite was prepared by mixing magnetite nanoparticles suspension with synthetic zeolite. The nanoparticles in suspension were synthesized by precipitating iron ions in a NaOH solution. The zeolite was synthesized from coal fly ash by alkaline hydrothermal treatment. The magnetic composite was characterized by XDR, SEM, magnetization measurements, IR, and BET surface area. Batch tests were carried out to investigate the adsorption of metal ions of Zn2+, Cd2+ and Pb2+ from aqueous solution onto magnetic composite. Adsorption isotherms were analyzed using Freundlich and Langmuir equations. The adsorption equilibrium data fitted well to the Langmuir equation with maximum adsorption capacities in the range of 28.5-127 mg g-1.

【 授权许可】

Unknown