Comparative Removal of VOCs from Aqueous Environment Using Ozonation, Fe/H2O2 and UV/Fe/H2O2 Processes

VOCs are one of the most important and dangerous pollutants in aquatic environments, which must be completely removed from aquatic environments due to their high toxicity and many harms to human health and other organisms. In this research, the removal of phenol from the aqueous environment was done by ozonation, Fe/H2O2 and UV/Fe/H2O2 processes on an experimental scale. In order to conduct research on experiments and the effect of interaction between parameters and to determine the optimal conditions, the design of the experiments was carried out using the RSM method. All tests were performed at ambient temperature. Under optimal conditions of the parameters, 99% of phenol was removed from aqueous solutions by the Fe/H2O2 method, 99.3% was removed by the Fenton UV/Fe/H2O2 method, and 99.5% of phenol was removed by the ozonation process. Using the RSM method, a quadratic equation with a very high correlation coefficient was fitted. The R2 and R2(adj) values of the predicted model for phenol removal in the Fe/H2O2 process were 95.92% and 92.25% respectively, and in the UV/F2/H2O2 process, 96% and 92.41% and in the ozonation process, 95.78% and 91.99% respectively.