| In recent years, heterogeneous catalyst has significant advantages and potential applications, which is used in wastewater treatment. Hence, it has attracted great attention of many scientists.In this paper, twoheterogeneous Fenton-like catalysts,FeⅢGluSiW and Fe2（MoO4）3-CNH were prepared, then their catalytic properties and mechanisms were studied.FeⅢGluSiW was synthesized from ferric chloride(FeⅢ), glutamate acid（Glu） and silicotungstic acid（Si W）. The catalyst showed high catalytic activity in 4-CP degradation in the dark and under irradiation. Under the conditions of 4-CP 100 mg/L, FeШGluSiW 0.2 g/L, H2O2 20 mmol/L, p H = 6.5, and T30 oC, 4-CP was completely decomposed in 90 min in the dark and in 40 min under irradiation, respectively. When the reaction time was prolonged to 2 h, the corresponding total organic carbon removals under dark and irradiated conditions were ca. 27% and 86%, respectively.The results revealed that FeⅢGluSiWshowed high activity for the degradation of 4-CP at the circumneutral p H, and the reaction could be significantly enhanced under irradiation. In the FeⅢGluSiW/H2O2 system,4-CP degradation could be attributed to the synergistic effect of Fe3+ and Si W12O404-, and main oxidative species is ?OH. FeⅢGluSiWhas the considerable stability and reusability, and no obvious performance drop was observed when the recovered catalysts were reused for three times.Fe2（MoO4）3-CNH was synthesized from ferric nitrate(FeⅢ), ammonium molybdate(MoO42-) and protonatedg-C3N4（CNH） by hydrothermal method.The catalyst showed high catalytic activity in methyl orange（MO） degradation.Under the conditions of MO100 mg/L, Fe2（MoO4）3-CNH 1.0 g/L, H2O2 20 mmol/L and T 30 oC, the decoloring ratioof MOreached 96% in 60 minunder irradiation.Compared with Fe2（MoO4）3 or Fe2（MoO4）3-C3N4, Fe2（MoO4）3-CNH has higher catalytic activity for MO degradation, and the reaction could be significantly enhanced under irradiation. In Fe2（MoO4）3-CNH/H2O2 system,MOdegradationcould be attributed to the interaction of MoO42-/H2O2, Fe3+/H2O2 and CNH. Fe2（MoO4）3-CNH has the considerable stability and reusability, and no obvious performance drop was observed when the recovered catalysts were reused for four times.The engineering application of catalysts werealso explored. The industrial catalytic performance was evaluated by the treatmentof municipal wastewater. Under the conditions of pH3, catalyst does0.5 g/L, H2O2 20 mmol/L,the mineralization rate of municipal wastewater was 18% in FeⅢGluSiW/H2O2 system and 11% in Fe2（MoO4）3-CNH/H2O2 system, respectively. The results revealed that FeⅢGluSiW or Fe2（MoO4）3-CNH has a certain catalytic activityin the treatment of municipal wastewater. |
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