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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