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首页> 外文期刊>Atmospheric environment >Source identification of PCDD/Fs and PCBs in pine (Cedrus deodar a) needles: A case study in Dalian, China
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Source identification of PCDD/Fs and PCBs in pine (Cedrus deodar a) needles: A case study in Dalian, China

机译:松针(Cedrus deodar a)中PCDD / Fs和PCBs的来源鉴定:以中国大连为例

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摘要

Factor analysis model with nonnegative constraints (FA-NNC) and positive matrix factorization (PMF) were successful in source identification of polychlorinated dibenzo-p-dioxins/dibenzofurans (PCDD/Fs) and polychlorinated biphenyls (PCBs) in pine (Cedrus deodara) needle samples collected from Dalian, China. The source profiles and source contributions derived from the two receptor models were comparable. The results suggested that the main sources of PCDD/Fs were various combustion processes (58-74%), pentachlorophenol contamination (15-17%), secondary aluminum smelters (9-12%), and traffic emissions (2-13%). As for PCBs, two sources were identified as PCB3 and PCB5, two typical Chinese technical PCB products. The overall source contributions of PCB3 are 72-80% and PCB5 20-28%, which is qualitatively consistent with the proportions of technical PCB products produced in China. This can be the first attempt to semi-quantitatively apportion PCDD/Fs and PCBs in vegetation samples using different receptor models.
机译:具有非负约束(FA-NNC)和正矩阵分解(PMF)的因子分析模型已成功地在松树(Cedrus deodara)针中的多氯二苯并对二恶英/二苯并呋喃(PCDD / Fs)和多氯联苯(PCBs)的来源鉴定中从中国大连收集的样本。从两个受体模型得到的来源概况和来源贡献是可比较的。结果表明,PCDD / Fs的主要来源是各种燃烧过程(58-74%),五氯苯酚污染(15-17%),二次铝冶炼厂(9-12%)和交通排放(2-13%)。 。至于多氯联苯,确定了两个来源,即两种典型的中国技术性多氯联苯产品,即PCB3和PCB5。 PCB3的总体来源贡献为72-80%,PCB5的总体贡献为20-28%,这在质量上与中国生产的技术PCB产品的比例一致。这可能是首次尝试使用不同的受体模型对植被样品中的PCDD / Fs和PCB半定量分配。

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