(廣東工業(yè)大學(xué) 環(huán)境科學(xué)與工程學(xué)院，廣州 510006)
摘 要: 為了探討2-巰基苯并噻唑(MBT)的生物降解性，借鑒浮選捕收劑等有機(jī)物的生物降解性評價(jià)體系，分別采用靜置燒瓶篩選試驗(yàn)法、震蕩培養(yǎng)法(GB/T 15818—2006)、改良斯特姆法(OECD—301B)3種評價(jià)方法首次對MBT的生物降解性進(jìn)行探討。結(jié)果表明：在靜置燒瓶篩選試驗(yàn)法中，MBT在第4周期的生物降解度為4.68%；在震蕩培養(yǎng)法中，MBT的8 d生物降解度為28.9%；在改良斯特姆法中，MBT的生物降解性指數(shù)IB為77.07，相對降解度(DRBD)為35.49%。這3種評價(jià)方法得出的結(jié)論一致表明MBT屬于難生物降解有機(jī)物，對微生物有一定毒害作用，抑制微生物的生長。本研究可為MBT的環(huán)境行為以及含MBT廢水的生物處理技術(shù)提供基礎(chǔ)資料。
關(guān)鍵字: 2-巰基苯并噻唑；生物降解性；評價(jià)；動(dòng)力學(xué)
（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
