PBS基共聚物及其模拟降解产物对赤子爱胜蚓急性生态毒性的研究  

The effect of acute ecotoxicity of PBS-based copolymer and its simulated degradation products on earthworm Eisenia fetida

作　　者：张敏[1,2] 苏康宇 李成涛[1] 陈倩茹[1] 闫珊珊[1] 李蓉[1] 

机构地区：[1]教育部轻化工助剂化学与技术重点实验室陕西科技大学,陕西西安710021 [2]浙江温州轻工研究院,浙江温州325003

出　　处：《生态环境学报》2010年第10期2425-2429,共5页Ecology and Environmental Sciences

基　　金：陕西省重大科技创新项目(2009ZKC08-09);温州科技计划项目(H20080045);陕西科技大学科研启动费资助

摘　　要：采用滤纸接触法和自然土壤法,通过急性毒性实验分别研究了20℃时不同分子量PBS(聚丁二酸丁二醇酯poly(butylene succinate))基聚合物及其模拟降解产物二元酸、二元醇对赤子爱胜蚓(Eisenia foetida)的存活和生长的影响。研究结果表明:48 h内二元酸、二元醇质量浓度在低于3 400 mg.L-1时对蚯蚓的存活没有影响,滤纸接触法测得丁二酸、己二酸、1,4-丁二醇、1,6-己二醇对蚯蚓的LC50分别为:3 523、3 402、74 907、18 160 mg.L-1;在自然土壤实验中,相比空白实验,蚯蚓在含有不同分子量、不同质量分数的PBS及PBS-co-HS、PBS-co-BA土壤中经过14 d的培养,体质量明显增加,且所有的蚯蚓没有任何病状或伤口出现。以上结果表明PBS基聚合物对该物种是安全的。Contact filter paper test and natural soil method were used to investigate the effects of acute ecotoxicity of poly（butylene succinate）-based copolymer and its simulated degradation products（diacids and diols） on earthworms Eisenia fetida at 20 ℃.The results showed that diacids and diols with concentration less than 3400 mg·L-1 had no effect on survival of earthworms within 48 h.The LC50 of succinic acid,adipic acid,1,4-butanediol and 1,6-hexanediol to earthworms Eisenia fetida by contact filter paper test were 3523,3402,74907,and 18160 mg·L-1,respectively.Comparing with the control test,the natural soil method showed weights of earthworms were significantly increased in soil which containing PBS-based copolymer with different Mn and different mass fraction（the mass percent of PBS、PBS-co-HS、PBS-co-BA were 15000、10000、5000、1000、0 mg·kg-1,respectively） after cultured for 14 days,and there were no indication of any pathology on earthworms.These results showed that PBS-based copolymer was safe for this specie.

关 键 词：PBS 生态毒性 赤子爱胜蚓 LC50 体质量变化率 

分 类 号：X171.5[环境科学与工程—环境科学]