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。
In this study, effects of humic acids (HA) and microorganisms on the migration of hydrophobic organic contaminants (HOCs), decabromodiphenyl ether (BDE-209), 4,4′-dibromodiphenyl ether (BDE-15) and anthracene, in soils were examined. More soil particles were dispersed into the colloidal phase (0.22-1 μm) in the presence of HA and/or microorganisms as a result of increased erosion and friction. The study suggested that PBDEs (BDE-209 and BDE-15) and anthracene in soils would be transported to other places by soil colloids with surface and underground water flow given the high concentrations of HA and microorganisms in the natural environment.
YU Sheng, ZOU Peng, ZHU Wei, YANG LiuYan, XIAO Lin, JIANG LiJuan, WANG XiaoLin, WU Jun & YUAN Ye State Key Laboratory of Pollution Control and Resource Reuse
