共基质条件下黄药的生物降特性研究

STUDYONBIODEGRADABILITYOFXANTHATE UNDER THE CONDITIONSOFCO-SUBSTRATE

研究了以乙酸钠、甘油和葡萄糖作为共基质时黄药的生物降解特性。结果表明,在试验条件下,葡萄糖为最佳共代谢基质,蛋白胨作为最佳氮源时黄药的生物降解性最好,此时黄药的降解率为91.47%;而单基质条件下,黄药的降解率仅为55.54%,相比其降解率提高了35.93%。可见共基质代谢大大提高了黄药的降解率,因此共基质代谢是提高黄药生物降性的一条有效途径。CS2和双黄药是黄药生物降解的主要中间产物。

The biodegradability of xanthate with sodium acetate,glycerol and glucoseas co-substrate was studied.The results indicated that： Under the experi-mental condition,the highest biodegradation efficiency were achieved when glucose as co-substrate and peptone was the best nitrogen source,and the biodegradation efficiency of xanthate can attain 91.47%,while using xanthate as the sole substrate,the degradation efficiency of xanthate is only 55.54%,with an increases of 35.93%.So it can be seen that co-substrate metabolism can greatly enhance the efficiency of xanthate degradation,greatly shorten the period,im-prove the treatment efficiency,and save processing time and operating cost significantly.So a conclusion can be obtained that co-substrate metabolism is one of the most effective ways to enhance the biodegradability of xanthate.Finally,the biodegradation intermediates of xanthate were preliminarily explored,the re-sults showed that CS2 and dixanthate are the main intermediates of biodegradation of xanthate.