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Improvement of Nanosized CuO-Fe2O3/cordierite System by Li2O-treatment for wastewater treatment | ||
Journal of Ultrafine Grained and Nanostructured Materials | ||
مقاله 6، دوره 52، شماره 2، اسفند 2019، صفحه 175-187 اصل مقاله (1.37 M) | ||
نوع مقاله: Research Paper | ||
شناسه دیجیتال (DOI): 10.22059/jufgnsm.2019.02.06 | ||
نویسندگان | ||
Nouf ElHarby1؛ Abdelrahman Badawy* 2؛ Shimaa Ibrahim3 | ||
1Department of Chemistry, College of science and arts, Qassim University, Qassim, Saudi Arabia. | ||
2Physical Chemistry Department, National Research Centre, Dokki, Cairo, Egypt. | ||
3Department of Chemistry, Faculty of Education, Ain Shams University, Cairo, Egypt. | ||
چکیده | ||
A mixture of 10 wt% CuO-10 wt% Fe2O3 supported on cordierite were prepared by wet impregnation. The as-prepared solids doped with Li2O (0.75-3 mol %) were calcined at 500-900 ºC. The crystalline phase, morphology, and surface area were investigated by XRD, HR-TEM and N2-adsoprtion-desorption. Moreover, their photocatalytic activities of samples calcined at 700°C on the degradation of phenol were evaluated under UV-irradiation. The catalytic activity of different solids toward H2O2 decomposition was studied. Nano-materials were used to adsorb dyes as Remazole-Red and Congo-Red from aqueous solution. The sorption process was in good agreement of pseudo-second order equation and the Langmuir equation through their adsorption kinetics and isotherms, respectively. The CuO-Fe2O3/ cordierite doped with 0.75% Li2O at 700 ºC adsorbent was found to possess the highest removal efficiency of Remazole-Red and/or Congo-Red dyes and potentially lowering capital and operational costs for \practical applications. The highest removal efficiency of the anionic dyes over 0.75% Li2O at 700 ºC can be discussed by observing the appearance of new active phases as CuO, CuFe2O4 and LiCuO, decreasing the crystallite size of these active phases. 0.75 mol% Li2O has the greatest activity in H2O2 decomposition reached 700 %. This result may be related to the lowest particle size and the highest surface area of this sample, which also produced a large number of electrons donating active sites for H2O2 decomposition. | ||
کلیدواژهها | ||
Congo-Red dye؛ Remazole-Red dye؛ Copper ferrite؛ COD؛ Cordierite؛ Li2O- doping؛ H2O2-decomposition | ||
مراجع | ||
28. Cullity, B.D., Publishing Cos, 2nd ed., Addison-Wesley, Reading, MA, 1978, pp.102. 32. Freundlich, H.M.F., Over the adsorption in solution. J. Phys. Chem 1906, 57(385471):1100-1107. 45. Ho Y-S. Absorption of heavy metals from waste streams by peat: University of Birmingham; 1995. | ||
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