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·mol^-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.