Background and purpose: Stability of new synthetic compounds such as Dimethyl phthalate increased their concentration in the environment and food chain and caused health risks. Therefore, achieve effective and efficient methods to removal of pollutants are one of the environmental researchers concern. This study investigates efficiency of heterognous Fenton process using  nZVI in dimethylphthalate removal from aqueous solutions.

Materials and Methods: This experimental study was conducted in batch reactor in laboratory scale and the efficiency of heterognous Fenton process was analyzed in a batch system with the effect of changes in operating parameters such as reaction time (15 to 120 min), pH (2 to10), H₂O₂ concentration (0.01 to 1 mmol/L), nZVI dose (0.01 to 0.5 mg/L) and initial concentration of Dimethyl phthalate (2 – 50 mg /L). Then the effect of each heterogeneous Fenton regent in dimethyl phthalateremoval was determined.

Results: The results showed that the maximum efficiency of heterognous Fenton process in removal of Dimethyl phthalate is at pH=4. Also in optimal conditions, the parameters affecting reaction was determined  as H₂O₂ concentration 0.1 mmol/L, nZVI dose 0.05 gr/L, Dimethyl phthalate concentration 2 mg/L and 120 minute, amount of Dimethyl phthalate removal was 92.8%.

Conclusion: According to the results, heterognous Fenton process using  nZVI has an optimal efficiency in removal of Dimethyl phthalate from aquatic solutions and can be considered as an acceptable and low Cost method for the removal of similar compounds.