標題: Treatment of Reactive Black 5 by combined electrocoagulation-granular activated carbon adsorption-microwave regeneration process
作者: Chang, Shih-Hsien
Wang, Kai-Sung
Liang, Hsiu-Hao
Chen, Hsueh-Yu
Li, Heng-Ching
Peng, Tzu-Huan
Su, Yu-Chun
Chang, Chih-Yuan
環境工程研究所
Institute of Environmental Engineering
關鍵字: Azo dye;GAC;Microwave irradiation;Toxicity
公開日期: 15-三月-2010
摘要: Treatment of an azo dye, Reactive Black 5 (RB5) by combined electrocoagulation-activated carbon adsorption-microwave regeneration process was evaluated. The toxicity was also monitored by the Vibrio fischeri light inhibition test. GAC of 100 g L(-1) sorbed 82% of RB5 (100 mg L(-1)) within 4h. RB5-loaded GAC was not effectively regenerated by microwave irradiation (800W, 30s). Electrocoagulation showed high decolorization of RB5 within 8 min at pH(0) of 7, current density of 277 A m(-2), and NaCl of 1 g L(-1). However, 61% COD residue remained after treatment and toxicity was high (100% light inhibition). GAC of 20g L(-1) effectively removed COD and toxicity of electrocoagulation-treated solution within 4h. Microwave irradiation effectively regenerated intermediate-loaded GAC within 30s at power of 800 W, GAC/water ratio of 20 g L(-1), and pH of 7.8. The adsorption capacity of GAC for COD removal from the electrocoagulation-treated solution did not significantly decrease at the first 7 cycles of adsorption/regeneration. The adsorption capacity of GAC for removal of both A(265) (benzene-related groups) and toxicity slightly decreased after the 6th cycle. (C) 2009 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.jhazmat.2009.10.088
http://hdl.handle.net/11536/5720
ISSN: 0304-3894
DOI: 10.1016/j.jhazmat.2009.10.088
期刊: JOURNAL OF HAZARDOUS MATERIALS
Volume: 175
Issue: 1-3
起始頁: 850
結束頁: 857
顯示於類別:期刊論文


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