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Combination of Electrocoagulation and Photocatalysis Process for Dye Removal from Textile Effluent
Paper Type  |
Contributed Paper |
Title |
Combination of Electrocoagulation and Photocatalysis Process for Dye Removal from Textile Effluent |
Author |
Supamas Danwittayakul* and Phutthamon Chantes |
Email |
supamasd@mtec.or.th |
|
Abstract: Electrocoagulation, photocatalysis and the combination of both methods were carried out to compare dye removal efficiency from an aggressive high chemical oxygen demand (COD) dyeing
wastewater. The as-received effluent was 195 mg/L reactive dye and 60 mg/L sodium silicate having
2457 mg/L of COD. For the individual electrocoagulation, the optimum condition was found upon
using mixed Fe/Al:cathode/anode electrode materials, 12 V of electrical voltage and electrode gap of
1 cm, which yielded about 68% dye removal and the 71% COD reduction. In the TiO2 photocatalytic
experiments, 0.05% was the best concentration exhibiting about 35% dye removal with the COD
reduction of 38% under UVC irradiation for 2 hours. The similar result of 36% dye removal was obtained
when using ZnO powders, while ZnO/ZTO (zinc oxide composited with zinc tin oxide) supported
ceramic exhibited above 48% dye removal. To further enhance the removal efficiency, the integrated
process of 1 hour electrocoagulation consecutively connected with additional 2 hours photocatalysis
using ZnO/ZTO supported catalyst showed the highest treatment efficiency of 90% dye removal
with 96% COD reduction. In contrast, the simultaneous electrocoagulation with photocatalysis using
ZnO/ZTO supported catalyst exhibited 68% dye removal with only 77% COD reduction. |
|
Start & End Page |
533 - 544 |
Received Date |
2020-06-22 |
Revised Date |
|
Accepted Date |
2020-08-20 |
Full Text |
Download |
Keyword |
wastewater treatment, electrocoagulation, photocatalysis, TiO2, ZnO, ZnO/ZTO |
Volume |
Vol.48 No.2 (March 2021) |
DOI |
|
Citation |
Danwittayakul S. and Chantes P., Combination of Electrocoagulation and Photocatalysis Process for Dye Removal from Textile Effluent, Chiang Mai J. Sci., 2021; 48(2): 533-544. |
SDGs |
|
| View:545 Download:255 | |
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