摘要
用同位素示踪法测定微生物的葡萄糖摄入量,可以检测废水中有毒物质的生物毒性.实验结果显示:TCC/TCS对废水处理系统中厌氧菌的葡萄糖摄入有抑制作用,其抑制率与接触剂量的对数呈线性关系,但与接触时间却没有明显的线性关系.由此可见,TCC/TCS对微生物葡萄糖摄入的影响是复杂的.当生物处理系统中的微生物未接触TCC/TCS时.10%有作用浓度(EC_(10))和50%有作用浓度(EC_(50))分别为1.71mg.l^(-1)和14.39mg.l^(-1);接触TCC/TCS二周后.其EC_(10) 和EC_(50)变化不大;四周驯化后,EC_(10)和EC_(50)有明显回升,分别为2.79mg.l^(-1)和24.3mg.l^(-1),这表明经驯化后TCC/TCS对微生物葡萄糖摄入的抑制作用有所降低.
Tagged atom is a method which has high sensitivity and can detect trace substance. TCC/TCS as the antibacteriostatic agent can influence the wastewater biological treatment system. For obtaining a complement toxicity data of TCC/TCS , we determine the toxicity of TCC/TCS to anaerobic bacteria in the wastewater biological treatment system by isotope tracing. The results show: TCC/ TCS can inhibit the glucose uptake of the anaerobic bacteria. The inhibitory rate has linar relationship with the logarithm of contacting dose, but inhibitory rate has not linar relationship with the contacting times. This indicates that the influences of TCC/TCS to glucose uptake of microorganisms are complex.When microorganisms do not contact TCC/TCS,EC10 and EC50 are 1.71mg·1-1 and 14.39mg·l-1 respectively, when contacting TCC/TCS for two weeks, EC10 and EC50 had little changed. After contacting TCC/TCS for four weeks, EC10 and EC50 increased significantly to 2.79mg·l-1 and 24.3mg·l-1. This show that the toxicity of TCC/TCS decreased after incubation.
出处
《环境化学》
CAS
CSCD
北大核心
1999年第5期458-463,共6页
Environmental Chemistry
基金
广州P&G公司科研基金资助项目
关键词
同位素示踪
废水检测
TCC/TCS
生物毒性
isotope, 3,3,4'-trichlorocarbanilide, 2,4,4-tricholor-2hydroxyldiphenyl glucose metabolism.
