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以水溶液中苯并噻唑(BTH)为目标污染物,考察了初始pH、H2O2体积分数、n(H2O2)/n(Fe2+)、温度对其芬顿氧化降解效果的影响;借助高效液相色谱-质谱技术(HPLC-MS)对反应体系降解产物进行分析测定,提出了苯并噻唑的可能降解机制.结果表明,最佳降解条件为:pH=2.5,30% H2O2投加量为4 mL/L,n(H2O2)/n(Fe2+)=10∶1,温度为30℃,反应时间为60 min,此时,苯并噻唑去除率高达94.37%.苯并噻唑芬顿氧化降解符合一级反应动力学,根据计算,反应活化能为97 kJ/mol.HPLC-MS结果显示,苯并噻唑降解中间产物为2-羟基苯并噻唑,然后噻唑环C-N键进一步断裂,生成2-甲磺酰基硝基苯.“,”The influences of initial pH value,H2O2 volume fraction,n(H2O2)/n (Fe2+) and temperature on the degradation efficiency of benzothiazole in aqueous solution by Fenton process is studied.The degradation products in the reaction system are analyzed by HPLC-MS.The degradation mechanism of benzothiazole is proposed.The experimental result show that the optimum oxidation degradation conditions are as follows:pH =3,dosage of H2O2 (30%) is 4 mL· L-1,n(H2O2)/n(Fe2+) =10:1,temperature at 30℃ and reaction time is 60 min.The removal rate of benzothiazole is 94.37% under optimum conditions.The degrading of benzothiazole by Fenton system follows first-order kinetic model.Based on calculation,the activation energy for degradation is about 97 kJ·mo1-1.The results by HPLC-MS show that the intermediate degradation product of benzothiazole is 2-hydroxy-benzothiazole,then C-N bond in thiazole ring is broken off to form 2-methylsulfonynitrobenzene eventually.