Zhu Chaofei, Li Yingming, Wang Pu, Chen Zhaojing, Ren Daiwei, Ssebugere Patrick, Zhang Qinghua, Jiang Guibin
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
Department of Chemistry, Makerere University, P.O. Box 7062, Kampala, Uganda.
Chemosphere. 2015 May;126:40-6. doi: 10.1016/j.chemosphere.2015.01.043. Epub 2015 Feb 17.
Polychlorinated biphenyls (PCBs) and polybrominated biphenyl ethers (PBDEs) were determined in environmental samples collected from Ny-Ålesund and London Island, Svalbard, the Arctic. Total PCB concentrations (∑25PCBs) varied from 0.57 to 2.52 ng g(-1) dry weight (dw) in soil, 0.30 to 1.16 ng g(-1) dw in plants and 0.56 to 0.98 ng g(-1) dw in reindeer dung. The non-Aroclor congener of CB-11 was predominant in most samples compared to other congeners, accounting for 16.0±9.8% to the ∑25PCBs. The ∑13PBDEs concentrations were 1.7-416, 36.7-495 and 28.1-104 pg g(-1) dw in soil, plants and reindeer dung, respectively. The signature of enantioselective biotransformation was observed in all samples for chiral CB-95, whereas in parts of samples for other chiral PCBs. Bioaccumulation factors (BAFs) in six plant species varied within individual contaminant congeners and plant species, with BAFs less than 1 for ∑PCBs and higher than 1 for ∑PBDEs. BAF values decreased with increasing soil concentrations, suggesting that high background levels in soil restricted the accumulation of these contaminants by plants.
在从北极斯瓦尔巴群岛的新奥尔松和伦敦岛采集的环境样本中，测定了多氯联苯（PCBs）和多溴联苯醚（PBDEs）。土壤中总多氯联苯浓度（∑25PCBs）在0.57至2.52纳克/克干重（dw）之间，植物中为0.30至1.16纳克/克干重，驯鹿粪便中为0.56至0.98纳克/克干重。与其他同系物相比，CB - 11的非氯丹同系物在大多数样本中占主导地位，占∑25PCBs的16.0±9.8%。土壤、植物和驯鹿粪便中∑13PBDEs浓度分别为1.7 - 416、36.7 - 495和28.1 - 104皮克/克干重。在所有样本中均观察到手性CB - 95的对映选择性生物转化特征，而在部分样本中观察到其他手性多氯联苯的该特征。六种植物物种中的生物累积因子（BAFs）在不同污染物同系物和植物物种之间存在差异，∑PCBs的BAFs小于1，∑PBDEs的BAFs大于1。BAF值随土壤浓度增加而降低，这表明土壤中的高背景水平限制了植物对这些污染物的累积。
