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将Fe(Ⅲ),Ni(Ⅲ)和Cu(Ⅱ)与N,N’-双邻羟苯亚甲基-1,2-苯二胺配位的络合物封装在Y分子筛内,作为多相类Fenton的高级氧化过程的催化剂,用于降解4-氯-3-甲基苯酚(PCMC).采用粉末X射线衍射、热重、N_2吸附-脱附、红外光谱、元素分析和扫描电镜对所制催化剂的物化性质进行了表征,并考察了H_2O_2的初始浓度、催化剂用量、温度和pH值等因素对模型有机污染物降解的影响.结果表明,在Fe(Ⅲ),Ni(Ⅲ)和Cu(Ⅱ)催化剂作用下,在较低的酸性pH值、催化剂用量0.1 g、H_2O_2的初始浓度0.35 mmol/L的条件下,于50℃反应120 min几乎可以完全去除PCMC.同时还考察了所制PCMC降解催化剂的重复使用性能,提出了可能的催化剂失活机理,也研究了PCMC氧化过程中可能的中间产物和动力学.
The complex complexed with Fe (Ⅲ), Ni (Ⅲ) and Cu (Ⅱ) with N, N’-bis-salicylidene-1,2-phenylenediamine was encapsulated in Y zeolite as Degradation of 4-chloro-3-methylphenol (PCMC), a kind of Fenton advanced oxidation catalyst, was investigated by powder X-ray diffraction, thermogravimetric analysis, N 2 adsorption- desorption, infrared spectroscopy, elemental analysis and scanning electron microscopy The physical and chemical properties of the prepared catalysts were characterized and the effects of H 2 O 2 initial concentration, catalyst dosage, temperature and pH on the degradation of organic pollutants were investigated. Under the action of Cu (Ⅱ) catalyst, PCMC can be almost completely removed at 120 ℃ for 120 min under the condition of low acid pH value, 0.1 g catalyst dosage and 0.35 mmol / L H 2 O 2 initial concentration.At the same time, PCMC degradation catalyst reusability, proposed possible mechanism of catalyst deactivation, but also studied the possible intermediates and kinetics of PCMC oxidation process.