Photodegradation of Trace Trichloronitromethane in Water under UV Irradiation

Abstract EN

This study’s objective was to study the photodegradation of TCNM (trichloronitromethane) in water under UV light.

The effects of light intensity, nitrate ions, chloride ions, humic acid, and pH on the photochemical degradation of TCNM were investigated under the irradiation of low pressure mercury lamp (λ = 254 nm, 12 W).

The photodegradation rate of TCNM was found to increase with increasing the concentration of nitrate ions, chloride ions, humic acid, pH, and light intensity.

The photodegradation of TCNM was examined at pH 6.0 with initial concentrations ( C 0 ) of TCNM at 10.0–200.0 µg/L.

The overall rate of degradation of TCNM was modeled using a pseudofirst-order rate law.

Finally, the proposed mechanism involved in the photodegradation of TCNM was also discussed by analysis.

Results of this study can contribute to the development of new source control strategies for minimization of TCNM risk at drinking water and wastewater utilities.