Adsorption and Desorption Mechanisms of Methylene Blue Removal with Iron-Oxide Coated Porous Ceramic Filter
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Abstract
Adsorption and desorption mechanisms of methylene blue (MB) removal with iron-oxide coated porous ce-ramics filter (IOCPCF) were investigated in batch and column mode. The results revealed that MB removal mechanisms included physical adsorption and chemical adsorption, of which chemical adsorption by surface ligand complex reaction played a dominant role after infrared spectrum analysis. Recycling agents were se-lected from dilute nitric acid (pH=3), sodium hydroxide solution (pH=12) and distilled water. Among three agents, dilute metric acid (pH=3) was the best recycling agent. Regeneration rate of IOCPCF arrived at 82.56% at batch adsorption and regeneration was finished in 75min at column adsorption. Adsorp-tion-desorption cycles of IOCPCF after batch and column adsorption were four and three times, respectively. Further, compared with fresh IOCPCF, MB removal rate with these desorbed IOCPCF adsorption only slightly decreased, which suggested that IOCPCF should be used repeatedly.
- M. Joonghwan, H. Jeong-Eun, J. Jonggeon, et al., “Pre-treatment of a dyeing wastewater using chemical coagu-lants,” Dyes and Pigments, Vol. 72, No. 2, pp. 240-245, 2007.
- A. P. Pantelis, P. X. Nikolaos, and M. Dionissios, “Treatment of textile dyehouse wastewater by TiO2 photocatalysis,” Water Research, Vol. 40, No. 6, pp. 1276-1286, 2006.
- G. M. Walker, “Adsorption of dyes from aqueous solu-tion- the effect of adsorbent pore size distribution and dye aggregation,” Chemical Engineering Journal, Vol. 83, No. 3, pp. 201-206, 2001.
- G. Renmin, J. Youbin, S. Jin, et al., “Preparation and utilization of rice straw bearing carboxyl groups for re-moval of basic dyes from aqueous solution,” Dyes and Pigments, Vol. 76, No. 2, pp. 519-524, 2008.
- H. Runping, W. Yuanfeng, Y. Weihong, et al., “Removal of methylene blue from aqueous solution by chaff in batch mode,” Journal of Hazardous Materials B, Vol. 137, No. 1, pp. 550-557, 2006.
- F. W. Li, J. F. Wu, X. H. Xu, et al., “Study on surface modification of porous ceramics filter media by iron ox-ide compound,” Journal of Hunan University of Science & Technology (Natural Science Edition), China, Vol. 23, No. 1, pp. 117-120, March 2008.
- H. C. Thomas, “Heterogeneous ion exchange in a flowing system,” Journal of the American Chemical Society, Vol. 66, pp. 1664-1666, 1944.
- H. Hohl and W. Stumm, “Interaction of Pb2+ with hy-drous- Al2O3,” Journal of Colloid Interface Science, Vol. 55, No. 2, pp. 281-288, 1976.
- K. F. Hayes and J. O. Leckie, “Modeling ionic strength effects on cation adsorption at hydrous oxide/solution in-terface I,” Journal of Colloid Interface Science, Vol. 115, No. 3, pp. 564-572, 1987.