Treatment of industrial wastewater containing Nitro phenols byUV/TiO2 process and recycling it for agricultural use

Due to limitation in water resources, the treatment of wastewater and reusing it foragricultural purpose is inevitable. In this study, the degradation and mineralization of 2-nitrophenol (2NP) in the wastewater of industries was investigated by UV/TiO2 process in a batchphoto reactor. The effect of different variables such as initial pH, TiO2 concentration and initialconcentration of pollutant on the reaction rate has been examined. In optimum conditions (2 g/l ofcatalyst, pH at 7 and initial 2NP concentration of 15 mg/l), 92% of pollutant degradation and 65%of TOC removal were achieved in 180 and 240 min of reaction, respectively. The reaction raterepresented by the mechanism of Langmuir-Hinshelwood was found to follow pseudo first-orderkinetics.

Keywords:

Heterogeneous photo catalysis , industries , Carcinogenic pollutants , batch photoreactor , 2-nitrophenol (2NP)