Adsorption of methylene blue onto Nanosized Transition Metal Spinels with High Surface Areas from Zeolite Y: Adsorption isotherms, kinetic and thermodynamic studies

سال انتشار: 1400
محل انتشار: دهمین سمینارملی شیمی و محیط زیست ایران
کد COI اختصاصی: NSCEI10_011
زبان مقاله: انگلیسی
تعداد مشاهده: 72

نویسندگان

Department of Chemistry, Payame Noor University, ۱۹۳۹۵-۴۶۹۷ Tehran, Iran

چکیده

Spinel particles with sizes in the nanometer range having high surface areas are obtained by the calcination of transition metal exchanged zeolites. The spinel crystallites grow within an amorphous silica matrix, formed by the collapse of the zeolite framework. Dissolution of this matrix leads to the high surface area spinels. The compositions of the zeolites, as well as the calcination conditions, have an influence on the type of phases formed and on the properties of the phases. The adjustment of these conditions enables control of the size of the spinel particles. Removing dye pollutants from industrial waste water is a common environmental application of nanomaterials. This study investigated in-situ synthesis and adsorbing ability of a Nano Catalyst Mixoxides - Zeolite- for Methylene Blue (MB) dye. To determine composite structure, chemical bonds, morphological features X-ray diffraction (XRD), Fourier transform of infrared spectroscopy (FTIR) and Field Emission Scanning Electron Microscopy (FESEM) were examined and adsorbent capacity (function of solution pH, time of removal and material content ) for Methylene Blue (MB), by four method (Isotherm Langmuir, Redlich–Petersonand, Linear regression and Isotherm Freundlich) were studied. Experimental results of Mixoxides -Zeolite- nanocomposite showed average removal adsorbent of ۷۰% in ۳۰ minutes and removing by external magnetic field in a minute. This study shows that the synthesized nanocomposite advances for high amount of pollutant cleaning in a short time by using small amount of materials.

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