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

摘要

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