Graduate Institute of Environmental Engineering, National Central University (NCU), Zhongli 320, Taiwan.
Environment Protection Administration, Environment Analysis Laboratory, Zhongli, Taiwan.
Ecotoxicol Environ Saf. 2019 Jun 15;174:384-389. doi: 10.1016/j.ecoenv.2019.02.087. Epub 2019 Mar 5.
Sediment samples were collected from a large reservoir and a river in northern Taiwan to investigate the occurrence and characteristics of Σ73PCNs analyzed. Results indicate that total concentrations of PCNs (Di- to Octa-CNs) measured in sediments collected in reservoir (29.2 ± 7.11 pg/g-dw) are significantly lower than that of samples collected in river (987 ± 440 pg/g-dw). The increasing trend of PCN concentration from upstream to downstream is found for the sediments collected in reservoir. PCN concentrations measured in surface sediments are relatively higher than that measured in sub-surface sediments collected in reservoir. Tetra-CNs consistently dominate in reservoir sediments, however, Penta-, Tetra- and Mono-CNs dominate in sediments collected at different sampling sites of the river investigated, suggesting that various sources contribute to PCNs collected from river. Indeed, diagnostic ratios indicate that mix-source contribute to PCNs measured in sediments collected from the reservoir and river in northern Taiwan.
本研究采集了台湾北部一座大型水库和一条河流中的沉积物样本，以调查Σ73PCNs 的存在情况和特征。结果表明，在水库中采集的沉积物中测量的 PCN（二至八氯代萘）总浓度（29.2±7.11pg/g-dw）明显低于在河流中采集的样品（987±440pg/g-dw）。在水库中采集的沉积物中，从上游到下游发现 PCN 浓度呈上升趋势。在水库中采集的表层沉积物中测量的 PCN 浓度相对高于在水库中采集的表层以下沉积物中测量的浓度。在水库沉积物中，四氯代萘一直占主导地位，然而，在调查河流的不同采样点采集的沉积物中，五氯代萘、四氯代萘和一氯代萘占主导地位，表明各种来源的 PCNs 都对河流中的 PCNs 有贡献。事实上，诊断比表明，混合来源对台湾北部水库和河流沉积物中测量的 PCNs 有贡献。
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