摘要
通过不同层次水生无脊椎动物的毒理学研究,能更好地反映有机化合物的生态效应.以氯化三丁基锡(TBTCI)为例.结果表明,TBTCI对原生动物等5种水生无脊椎动物的半致死浓度(LC_(50))为25.65—355.63ppb.有明显的种特异性;TBTCI对河口轮虫种群净生殖率的EC_(50)为10ppb,影响平均寿命EC_(50)为22ppb;根据浓度C及原生动物平衡种类数Seq进行回归,得方程Seq=11.87—1.84 In C(P<0.05).推算出TBTCI对微型生物群落的 EC_5,EC_(20).EC_(50)分别为0.29,0.98和11.14ppb.根据对不同种的急性毒性LC_(50).取AF为0.01,推算出MATC(最高毒物允许浓度)为0.26—0.67ppb,与来自群落水平的EC_5(0.29ppb)相比更具科学性和环境真实性.
Study on the toxicity at different levels of aquatic organisms could well reflect the ecological effects of organic compounds. For example as tributyltin chloride (TBTC1) ,the results showed that the range of LC50 was 25. 65-355. 63 ppb,so there were a strong specific differences of LC50 among five aquatic invertebrate species including protozoan. EC50 of TBTC1 on the net reproduction rate was 10ppb and EC50 on the average life was 22 ppb for the population B plicatilis. Based on the concentration (C) and the number of equivalent species of protozoan(Seq), an essential parameter of microbiota function ,a regression equation Seq= 11.87- 1.84 lnC(P< 0. 05) was obtained. From the equation we calculated the EC5,EC20 EC50 of TBTC1 on the protozoanpopulation, they were 0.29,0.98 and 11.1 ppb respectivily. Acording to the acute toxicity LC50 on different species and AF at 0. 01, 0. 26-0. 67ppb of MATC (maximum allowable toxic concentration ) were calculated. Compared with EC5 ( 0. 29ppb) from population levels,it was more scientifically-based and more realistic in sense of environmental protection.
出处
《环境化学》
CAS
CSCD
北大核心
1994年第3期266-268,共3页
Environmental Chemistry
基金
国家自然科学基金资助项目
