摘要
采用GC-MS/MS技术对45个白洋淀表层沉积物（0~5 cm）样品中的三类（多溴联苯、多溴联苯醚和多氯联苯）多卤代芳烃（PHAHs）进行分析。实验发现多氯联苯（PCBs）是优势污染物（20.57 ng.g-1.dw）,PCB28,52,66,138,156和170是被检出的主要同族体;多溴联苯（PBBs）和多溴联苯醚（PBDEs）在沉积物中的检出浓度相对较低（0.47 ng.g-1.dw和1.78 ng.g-1.dw）,PBDE28和PBDE47是最具支配地位的PBDE同族体,分别占PBDEs总量的16%和21%。实验结果与国内外最近的文献报道值相比较,显示这三类PHAHs在沉积物中的浓度处于低污染水平,引起的潜在风险也相对较低。
45 surface sediment samples（at the top 0～5 cm layer） were collected from the Baiyangdian Lake.The contents of 22 PBB congeners,8 PBDE congeners,and 28 PCB congeners in sediments were measured using Varian CP3800/300 GC-MS/MS technique.The measured level shows that PCBs have the highest concentrations in the sediment samples among the three PHAH subfamilies,with Geometric Mean 20.57 ng·g-1·dw.PCB28,52,66,138,156 and 170 are the most predominant PCB congeners.The levels of PBBs and PBDEs are lower than those of PCBs in the sediment samples,with a concentration of 0.47 and 1.78 ng·g-1 ·dw,respectively.PBDE28 and 47 are the most predominant PBDE congeners,with their concentration accounting for 16 % and 21 % of the total PBDEs concentration observed in the sample,respectively.The PHAHs levels monitored in the present study were compared to those reported recently for districts located in other countries.The concentrations of PHAHs in the sediment samples were in the same order of magnitude of those reported on background levels in remote lakes sediment in these European and American countries,which shows toxic biological effects on aquatic biota and potential risk are negligible due to PHAHs contamination in sediments.
出处
《中国工程科学》
2010年第6期41-47,共7页
Strategic Study of CAE
基金
国家"九七三"项目(2006CB403403)
国家重大水专项(2008ZX07209
2008ZX07104
2008ZX07527)
国家自然科学基金创新研究群体基金项目(50721006)
