Polybrominated diphenyl ethers in soils of the modern Yellow River Delta, China: Occurrence, distribution and inventory
Polybrominated diphenyl ethers in soils of the modern Yellow River Delta, China: Occurrence, distribution and inventory
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中国现代黄河三角洲土壤中的多溴二苯醚：发生、分布和库存
DOI：
10.1016/j.chemosphere.2012.03.084
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发表时间：
2012-08-01
期刊：
影响因子：
8.8
通讯作者：
Zhang, Yifei
中科院分区：
文献类型：
--
作者：
Chen, Chang'er;Zhao, Hongxia;Zhang, Yifei
黄河是中国第二大河流。首次报道了现代黄河三角洲多溴联苯醚（PBDEs）的污染水平。测量了长江中下游地区土壤/沉积物样本中的20种多溴二苯醚同系物。多溴二苯醚的总浓度从无法检测到18 257纳克/千克不等，平均值为836纳克/千克。BDE-209是主要同系物，占多溴二苯醚总量的86.1-99.5%。BDE-153和BDE-183含量较高的多溴联苯醚同系物分布与渤海沉积物中的多溴联苯醚同系物分布相似，表明它们具有相似的来源。不同区域的浓度和同系物模式各不相同。结果表明，中部地区多溴联苯醚含量较高，其同系物组成也较为复杂，而现代路线和旧路线的多溴联苯醚含量较低。在表层土壤中检测到的多溴二苯醚要多得多，与下层土壤相比，表层土壤中的同源物也更多，这意味着近年来/几十年来，更多的多溴二苯醚被排放到这一地区。有机质控制了PBDE在土壤中的分布。该地区的土壤可能是渤海中BDE-209的来源。(C)2012爱思唯尔有限公司保留所有权利。
The Yellow River is the second largest river in China. In this study, the levels of polybrominated diphenyl ethers (PBDEs) in the modern Yellow River Delta (mYRD) were firstly reported. Twenty PBDE congeners in soil/sediment samples from mYRD were measured. The total PBDE concentrations ranged from non-detectable to 18 257 ng kg(-1) with a mean value of 836 ng kg(-1). BDE-209 was the dominant congener, accounting for similar to 86.1-99.5% of the total PBDEs. The congener profiles of PBDEs with higher abundances of BDE-153 and BDE-183 were similar to those in sediment of the Bohai Sea, indicating that they shared similar sources. The concentrations and congener patterns varied among different regions. Higher levels of PBDEs were found in the middle area (MA), and more complicated congener compositions were also observed in the MA, whereas lower levels of PBDEs were found in the modern course (MC) and the old course (OC). Much more PBDEs were detected in the top layer (TL) soil where more congeners were also held compared to lower soil layers, implying that more PBDEs were emitted into this area in recent years/decades. Organic matter controlled the PBDE distribution in the soil. Soil in this area might be a source of BDE209 for the Bohai Sea. (C) 2012 Elsevier Ltd. All rights reserved.