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

Quimica nova

Yamaura, Mitiko¹  Graciano, José Eduardo Alves¹  Fungaro, Denise Alves¹ 

[1] Instituto de Pesquisas Energéticas e Nucleares, São Paulo, Brasil

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 nanoparticlessuspension with synthetic zeolite. The nanoparticles in suspension were synthesizedby precipitating iron ions in a NaOH solution. The zeolite was synthesized fromcoal fly ash by alkaline hydrothermal treatment. The magnetic composite wascharacterized by XDR, SEM, magnetization measurements, IR, and BET surface area.Batch tests were carried out to investigate the adsorption of metal ions ofZn2+, Cd2+ and Pb2+ from aqueous solution ontomagnetic composite. Adsorption isotherms were analyzed using Freundlich andLangmuir equations. The adsorption equilibrium data fitted well to the Langmuirequation with maximum adsorption capacities in the range of 28.5-127 mg g-1.

【 授权许可】

CC BY