Magnetic niobia as adsorbent of organic contaminants in aqueous medium: effect of temperature and pH

Quimica nova

Guerreiro, Mário César¹  Oliveira, Luiz Carlos Alves¹  Gonçalves, Maraísa¹ 

[1] Universidade Federal de Lavras, Lavras, Brasil

关键词: iron oxide;    niobium oxide;    adsorptionprocess.;   

DOI  :  10.1590/S0100-40422008000300010

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

This work describes novel materials based onpure iron oxide and iron oxide/niobia composite to produce a magnetic adsorbent.These materials were prepared with synthetic iron oxide and characterized bypowder XRD, SEM, FTIR, TPR and Mössbauer spectroscopy. Results showed thatthe main iron oxides formed were goethite (aFeOOH)and maghemite (gFe2O3) withsmall particle size. The iron oxide and iron oxide/niobia composite showed highadsorption ability for organic compounds. The positive enthalpy indicated anendothermic adsorption process suggesting physical adsorption.

【 授权许可】

CC BY