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用紫外-可见分光光度法研究了水溶性金属卟啉Fe(TPPS)Cl催化H2O2氧化降解2,4,6-三氯苯酚(TCP)的动力学(TPPS为四(4-磺酸钠苯基)卟啉),探讨了反应体系酸度、H2O2/Fe(TPPS)Cl物质的量之比、温度对氧化降解速率的影响,提出了反应机理,建立了反应动力学数学模型.研究结果表明,TCP初始浓度为3.8×10-4 mol.L-1、Fe(TPPS)Cl浓度为4.0×10-5 mol.L-1、H2O2浓度为1.8×10-3mol.L-1、温度为25℃、pH值为6.8、反应时间为90 min时,TCP的降解率可达到99%,其表观活化能为10.96 kJ.mol-1.因此,Fe(TPPS)Cl作为模拟过氧化物酶在催化降解TCP过程中是一种有效的催化剂.
The kinetics of oxidative degradation of 2,4,6-trichlorophenol (TCP) by water-soluble metalloporphyrin Fe (TPPS) Cl catalyzed by H2O2 was studied by UV-Vis spectrophotometry (TPPS was tetrakis ) Porphyrin), the reaction system acidity, the amount ratio of H2O2 / Fe (TPPS) Cl substance and the effect of temperature on the oxidative degradation rate were discussed. The reaction mechanism was proposed and the mathematical model of reaction kinetics was established. The results show that TCP The concentration of Fe (TPPS) Cl was 4.0 × 10-5 mol·L-1, the concentration of H2O2 was 1.8 × 10-3 mol·L-1, the initial concentration was 3.8 × 10-4 mol·L-1, the temperature was 25 ℃, Under the conditions of pH 6.8 and reaction time 90 min, the degradation rate of TCP can reach 99%, and the apparent activation energy is 10.96 kJ · mol-1.Therefore, Fe (TPPS) Cl acts as a simulated peroxidase in the catalytic degradation TCP is an effective catalyst.