Nióbia magnética como adsorvente de contaminantes orgânicos em meio aquoso: efeito da temperatura e do pH

Química Nova

Maraísa Gonçalves¹  Luiz Carlos Alves Oliveira¹  Mário César Guerreiro¹ 

[1] ,Universidade Federal de Lavras Departamento de Química Lavras MG ,Brasil

关键词: iron oxide;    niobium oxide;    adsorption process;   

DOI  :  10.1590/S0100-40422008000300010

来源: SciELO

【 摘 要 】

This work describes novel materials based on pure iron oxide and iron oxide/niobia composite to produce a magnetic adsorbent. These materials were prepared with synthetic iron oxide and characterized by powder XRD, SEM, FTIR, TPR and Mössbauer spectroscopy. Results showed that the main iron oxides formed were goethite (aFeOOH) and maghemite (gFe2O3) with small particle size. The iron oxide and iron oxide/niobia composite showed high adsorption ability for organic compounds. The positive enthalpy indicated an endothermic adsorption process suggesting physical adsorption.

【 授权许可】

CC BY-NC   
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