(广东工业大学 环境科学与工程学院，广州 510006)
摘 要: 为了探讨2-巯基苯并噻唑(MBT)的生物降解性，借鉴浮选捕收剂等有机物的生物降解性评价体系，分别采用静置烧瓶筛选试验法、震荡培养法(GB/T 15818—2006)、改良斯特姆法(OECD—301B)3种评价方法首次对MBT的生物降解性进行探讨。结果表明：在静置烧瓶筛选试验法中，MBT在第4周期的生物降解度为4.68%；在震荡培养法中，MBT的8 d生物降解度为28.9%；在改良斯特姆法中，MBT的生物降解性指数IB为77.07，相对降解度(DRBD)为35.49%。这3种评价方法得出的结论一致表明MBT属于难生物降解有机物，对微生物有一定毒害作用，抑制微生物的生长。本研究可为MBT的环境行为以及含MBT废水的生物处理技术提供基础资料。
关键字: 2-巯基苯并噻唑；生物降解性；评价；动力学
（School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China）
Abstract:The biodegradability of 2-Mercaptobenzothiazole (MBT) was evaluated by the methods of static flask screening tests, oscillating culture method(GB/T 15818—2006) and modified Sturm test (OECD—301B) according to the testing standard for biodegradability of flotation reagents and other organic compounds. The results show that the removal rate of MBT is 4.68% in the forth cycle in the static flask screening tests. In oscillating culture method, the removal rate of MBT is 28.9% in 8 days. The biodegradability index (IB) of MBT is 77.07 and the relative degradation degree (DRBD) is 35.49% in the modified Sturm test. All the results indicate that MBT is a refractory biodegradable organic matter, which has certain toxicity to microorganisms and can inhibit the growth of microorganisms. The results of this study can provide a basis for the environmental behavior and the biological treatment technology of wastewater which contains MBT.
Key words: 2-Mercaptobenzothiazole; biodegradability; evaluating; kinetics
