Radiolytic degradation of 4-nitrophenol in aqueous solution
Abstract
The degradation of 4-nitrophenol was induced by ionizing radiation based on advanced oxidation processes, monitored by liquid chromatography and chemical oxygen demand. Aqueous solutions 0.2 mmol/dm3 of 4-NF in aerated environments, free of oxygen and saturated with N2O, were irradiated at different doses. By-products were identified using liquid chromatography equipment coupled with a diode array detector. The results showed that the degradation was affected by the environment in which the solution was irradiated. In addition, the degradation occurred faster in the saturated solution with N2O since in this solution it is highly oxidizing, which was determined by the negative slopes obtained by plotting the chemical oxygen demand as a function of the dose applied to the sample, resulting - 0.346, -0.227 and -0.149 mg O2 L-1 min-1 for irradiated solutions saturated with N2O, aerated and oxygen-free.
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References
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