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Coal-bearing kaolinite was directly treated with concentrated sulfuric acid to improve its surface properties and adsorption ability. Acid treatment was carried out at various temperatures (i.e., room temperature −250°C), by varying time of treatment from 0 to 120min. The samples were characterized by X-ray diffraction analysis, elemental analyses, thermogravimetric analysis, N2 adsorption-desorption...
In this work, mesoporous maghemite (γ-Fe2O3) was prepared by the thermal decomposition of [Fe(CON2H4)6](NO3)3 with the aid of cetyltrimethyl ammonium bromide (CTAB), and its adsorption ability for the removal of methyl orange (MO) from wastewater was investigated. X-Ray powder diffraction (XRD) together with nitrogen adsorption–desorption measurements show the formation of mesoporous γ-Fe2O3 with...
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