Direct photolysis of the emerging contaminant 2-(thiocyanomethylthio) benzothiazole (TMCTB) was performed in aqueous solution at different concentrations with high-pressure mercury lamp (5.0, 8.0, 13.0, 16.0, 20.0, 23.0, 27.0, 35.0, 40.0, 45.0, and 50.0 mg L^− 1) and with natural sunlight radiation (6.0, 30.0, and 60.0 mg L^− 1). TCMTB underwent rapid degradation by direct photolysis with a high-pressure mercury lamp in aqueous solutions, with 99% removal after 30 min at all concentrations studied. For sunlight photolysis, TCMTB degradation was observed with 96%, 81%, and 64% removal for initial concentrations of 6.0, 30.0, and 60.0 mg L^− 1, respectively, after 7 h of exposure to sunlight. The degradation of TCMTB in lab-scale wastewater had kinetic constant and t_1/2 in the same order when compared to the photodegradation of TCMTB in aqueous solutions. In addition, the results showed that photolysis with a high-pressure mercury lamp and sunlight were governed by the same kinetic order, however the kinetic parameters showed that degradation with sunlight was 40 times slower than photolysis with the mercury lamp. Twelve transformation products (TP) were identified, and eight of the TP have not been described in the literature. Furthermore, prediction of toxicity with ECOSAR software was carried out for fish, daphnids, and green algae species. It showed that photolytic treatment is efficient for reducing the toxicity of the compound, since the degradation formed compounds with lower toxicity than the primary compound. In conclusion, this study suggests that photolysis is an efficient way to remove the studied contaminant, and it highlights the potential of this technique for the degradation of emerging contaminants in industrial wastewater treatment plants.

使用高压水银灯（5.0，8.0，13.0，16.0，20.0，23.0，27.0，35.0，40.0，45.0，在不同浓度的水溶液中对新兴的污染物2-（硫氰基甲硫基）苯并噻唑（TMCTB）进行直接光解。和50.0 mg L ^-1）和自然光（6.0、30.0和60.0 mg L ^-1）。通过使用高压汞灯在水溶液中直接光解，TCMTB经历了快速降解，在所有研究浓度下30分钟后，TCTMB的去除率均达到99％。对于阳光光解，初始浓度为6.0、30.0和60.0 mg L ^-1时，TCMTB的降解率分别为96％，81％和64％。分别暴露在阳光下7小时后。实验室规模废水中TCMTB的降解具有动力学常数和t _1/2与水溶液中TCMTB的光降解相比，顺序相同。此外，结果表明，高压汞灯和日光的光解受相同的动力学顺序控制，但是动力学参数表明，日光的降解比汞灯的光解慢40倍。鉴定出十二种转化产物（TP），并且在文献中未描述八种转化产物。此外，还使用ECOSAR软件对鱼类，水蚤和绿藻物种进行了毒性预测。结果表明光解处理对于降低化合物的毒性是有效的，因为降解形成的化合物的毒性低于初级化合物。结论，