TENAX萃取表征土壤中多溴联苯醚(PBDEs)生物可利用性研究  

Tenax Extraction as a Tool to Evaluate the Bioavailability of Polybrominated Diphenyl Ethers in Soil

作　　者：梁贤伟[1] 杨丽萍[1] 祝凌燕[1] 

机构地区：[1]南开大学环境科学与工程学院,天津市城市生态环境修复与污染防治重点实验室,教育部污染过程与环境基准重点实验室,天津300457

出　　处：《农业环境科学学报》2010年第9期1712-1717,共6页Journal of Agro-Environment Science

基　　金：国家自然科学基金(20677032,20637030,20877044);教育部博士点基金(20070055031);教育部新世纪人才计划;科技部水专项基金(2008ZX07526-003);科技部国际合作项目(2009DFA91910)

摘　　要：为了建立一种用Tenax萃取快速评价土壤中多溴联苯醚生物可利用性的方法,本研究以商业多溴联苯醚DE-71和DE-79中6种主要同系物(BDE-47,99,100,154,153,183)为研究对象,对不同染毒浓度的土壤用Tenax萃取6 h,并将Tenax萃取结果与土壤-蚯蚓(赤子爱胜蚓Eisenia foetida)生物富集试验结果进行了比较。结果表明,单位质量土壤中被Tenax萃取出的PBDEs的质量随土壤中PBDEs浓度的增大而增加,随各同系物lgKow值的增大而降低。6 h Tenax萃取的富集因子TSAF6与蚯蚓的生物富集因子BSAF之间具有良好的相关性,表明6 h Tenax萃取能够有效表征土壤中PBDEs的生物可利用性。The six main congeners of polybrominated diphenyl ethers（PBDEs）in commercial products DE-71 and DE-79 were selected as target compounds.Tenax extraction for 6 h was used to evaluate the bioavailability of PBDEs in soil,and the results of Tenax extraction was compared with those of earthworm accumulation study.Tenax extraction for 6 h could extract the major PBDE congeners from soil at different concentration levels efficiently.The extracted concentration was defined as the mass of congeners which was extracted from one gram of soil.The extracted concentration increased with the concentrations of PBDE congeners in soil,but decreased with lgKow values of the congeners.There was a good correlation between the accumulation factor of PBDEs by Tenax extraction for 6 h（TSAF6）and that by earthworms（BSAF）.Therefore,Tenax extraction for 6 h could be used to evaluate the bioavailability of PBDEs in soil.

关 键 词：Tenax萃取 多溴联苯醚 生物可利用性 

分 类 号：X53[环境科学与工程—环境工程]