Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/45803
標題: Enhancement of Rhodamine B removal by low-cost fly ash sorption with Fenton pre-oxidation
作者: Chang, S.H.
魏銘彥
Wang, K.S.
Li, H.C.
Wey, M.Y.
Chou, J.D.
關鍵字: Basic dye
Fenton oxidation
Fly ash
Sorption
aqueous-solutions
biological treatment
methylene-blue
waste-water
dye removal
oxidation
degradation
adsorption
optimization
期刊/報告no:: Journal of Hazardous Materials, Volume 172, Issue 2-3, Page(s) 1131-1136.
摘要: The removal of a basic dye, Rhodamine B (RhB), by fly ash adsorption, Fenton oxidation, and combined Fenton oxidation-fly ash adsorption were evaluated. Even though fly ash is a low cost absorbent, a high dose of fly ash was needed to remove RhB. Only 54% of RhB was removed by 80g L(-1) fly ash. Solution pH did not significantly affect the RhB sorption by fly ash after 8 h. Fenton reagents at H(2)O(2) dose of 6 x 10(-3) M and pH 3 rapidly decolorized 97% of RhB within 2 min, and 72% of COD removal was obtained at 30 min reaction time. Spectrum analysis result showed that a large area of UV spectrum at 200-400 nm remained after Fenton reaction. The addition of 1 g L-1 fly ash effectively removed COD from Fenton-treated solution, and the UV absorption spectrum at 220-400 nm totally vanished within 2h. COD removal of RhB by the combined Fenton oxidation and fly ash sorption process was 98%. The COD removal capacity of fly ash for Fenton-treated RhB solution was 41.6 times higher than that for untreated RhB solution. The results indicated that the combined process is a potential technique for RhB removal. (C) 2009 Elsevier B.V. All rights reserved.
URI: http://hdl.handle.net/11455/45803
ISSN: 0304-3894
文章連結: http://dx.doi.org/10.1016/j.jhazmat.2009.07.106
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