摘要：Diatomite-supported a-Fe2〇3 (Fe-D), a kind of potential iron source for photo-Fenton process, was prepared and characterized by X-ray powder diffraction (XRD) and Field Emission Scanning Electron Microscope (FESEM). The ultraviolet light (X=254nm) was introduced into the treatment of dimethyl phthalate (DMP). Based on response surface methodology (RSM), central composite design (CCD) was used to study the effect of several operating parameters - the initial pH of solution, H2O2 concentration, and Fe-D dosage on the DMP removal efficiencies. According to the experimental results, the RSM model was derived and the response surface plots were given. The optimal condition for removal of DMP is 1.20 g • L-1 of Fe-D, 1.38 mmol • L-1 of H2O2 and initial pH=2.5. The actual degradation ratio of DMP could reach 90% under that condition. Apart from the discussing of the relative mechanism, the recyclability of Fe-D was also evaluated.
