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Research Article
ScienceAsia 32 (2006): 181-186 |doi: 10.2306/scienceasia1513-1874.2006.32.181
Treatment of Textile Dyeing Wastewater by Photo
Oxidation using UV/H2O2/Fe2+ Reagents
Chantanapha Sahunin, Jittima Kaewboran and Mali Hunsom*
ABSTRACT: Treatment of textile wastewater was carried out at room temperature in a batch reactor by using the
Photo-Fenton oxidation process. The effects of initial pH of the solution (pH = 1-7), ferrous ion concentration
(0-100 mgxl-1) and UV power (0-120 W) on chemical oxygen demand (COD) and color removal were examined.
The results showed that this process was enhanced at the acidic pH range. The optimum condition was found
to be at pH = 3, 80 mg Fe2+xl-1, 5-10 minutes operating time, 60 W UV power and 200 mg H2O2xl-1. At this
condition, approximately 52% and 90% of COD and color were removed, respectively. During the treatment
process, a small amount of sludge (5.8 x 10-5 kg x kg COD-1) was generated. The presence of heterogeneous
photocatalyst such as TiO2 in the system accelerated the removal percentage of COD and color.
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Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand 10330.
* Corresponding author, E-mail: mali@sc.chula.ac.th
Received 20 Dec 2004,
Accepted 13 Jan 2006
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