Aniline is used by many industrial organizations and is released into the environment in high amounts and pollutes the water. Due to the damages to human health, there is a need for effective and environmentally friendly methods to remove this compound from the water. The aim of this work is to mineralize and remove aniline by investigating total organic carbon removal and aniline removal, respectively, via using the eco-friendly method, subcritical water oxidation and green oxidizing agent, H 2 O 2 . The effect of process variables such as temperature, treatment time and H 2 O 2 concentration were evaluated. Total organic carbon removal of aniline was obtained as 92.73% in 80 min of treatment time and in the presence of 60 mM of H 2 O 2 at 403 K. 99.21% of aniline removal was achieved based on the UV spectrophotometric analysis at these conditions. The response surface method was used to optimize the performed model and the effect of the above-mentioned parameters. The reliability of the method was provided by ANOVA.

Degradation of epichlorohydrin was investigated using subcritical water oxidation method in the presence of hydrogen peroxide. Degradation rate was monitored by means of total organic carbon (TOC) analysis. The central composite design was used to determine optimal TOC removal conditions and modelling experimental process. The effects of all experimental variables (temperature, oxidant concentration of hydrogen peroxide and treatment time) on the TOC removal rates were evaluated and the theoretical prediction model was proposed. Reliability of the employed model was evaluated using ANOVA. F value and the p-value of the model were found to be 84.60 and <0.0001, respectively. 93.78 % of TOC removal was achieved in the degradation of epichlorohydrin at 373 K of temperature and 75 min of treatment time using 90 mM of H 2 O 2 .