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Nióbia magnética como adsorvente de contaminantes orgânicos em meio aquoso: efeito da temperatura e do pH Magnetic niobia as adsorbent of organic contaminants in aqueous medium: effect of temperature and pH

By Maraísa Gonçalves, Luiz Carlos Alves Oliveira and Mário César Guerreiro


<abstract language="eng">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

Topics: iron oxide, niobium oxide, adsorption process, Chemistry, QD1-999, Science, Q, DOAJ:Chemistry (General), DOAJ:Chemistry
Publisher: Sociedade Brasileira de Química
Year: 2008
DOI identifier: 10.1590/S0100-40422008000300010
OAI identifier: oai:doaj.org/article:33a6c34d4cea49d1b3fd45dcbf8fe4c2
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