Occurrence and distribution of polycyclic aromatic hydrocarbons in reclaimed water and surface water of Tianjin, China.
Occurrence and distribution of polycyclic aromatic hydrocarbons in reclaimed water and surface water of Tianjin, China.
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DOI：
10.1016/j.jhazmat.2005.04.003
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发表时间：
2005-06
影响因子：
13.6
通讯作者：
Zhonghong Cao;Yuqiu Wang;Yongmin Ma;Ze Xu;G. Shi;Y. Zhuang;Tan Zhu-
中科院分区：
文献类型：
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作者：
Zhonghong Cao;Yuqiu Wang;Yongmin Ma;Ze Xu;G. Shi;Y. Zhuang;Tan Zhu-
多环芳烃等持久性有机污染物因其持久性、生物累积性和毒性效应而备受关注。采用固相萃取-气相色谱-质谱联用技术（SPE-GC-MS），选择离子监测（SIM）模式，对美国环保署（EPA）优先污染物清单中的16种多环芳烃进行了分析。在中国北方天津进行了再生水和地表水取样。地表沃茨（主要河流、支流、沟渠等）中PAH总浓度在1800 ~ 35，000 ng/L之间。再生水的平均值为352 ng/L，在227 ~ 600 ng/L之间。再生水和地表水样品中的多环芳烃以低分子量多环芳烃（二环和三环组分）为主。这些结果表明，再生水和地表水中的多环芳烃可能来源于石油或污水污染（成岩输入）。为了阐明来源，使用基于菲与蒽和荧蒽与芘之间指数的分子指数来评估再生水和地表水中多环芳烃污染的可能来源（分别为火成来源和岩成来源）。所收集的数据表明，成岩输入占主导地位，在几乎所有的调查站。为了区分样品之间的模式差异和相似性，使用相关矩阵进行主成分分析（PCA）。主成分分析揭示了所有调查的地表水站之间的潜在关系，并证实了我们的分析结果。对比值和主成分分析的结果表明，比值和主成分分析在地表水调查中具有一定的应用价值。
Persistent organic pollutants (POPs) such as polycyclic aromatic hydrocarbons (PAHs) are of great concern due to their persistence, bioaccumulation and toxic effects. In this work, 16 PAHs included in the US Environmental Protection Agency's (EPA) priority pollutant list were analyzed using solid-phase extraction–gas chromatography–mass spectrometry (SPE–GC–MS) with a selected ion monitoring (SIM) mode. Reclaimed water and surface water sampling was undertaken in Tianjin, northern China. Total PAH concentrations varied from 1800 to 35,000ng/L in surface waters (main rivers, tributaries, ditches, etc.) with mean value of 14,000ng/L and from 227 to 600ng/L in reclaimed water with mean value of 352ng/L, respectively. The PAH profiles were dominated by low molecular weight PAHs (two- and three-ring components) in reclaimed water samples and surface water samples. These indicated that PAHs in reclaimed water and surface water might origin from oil or sewage contamination (petrogenic input). To elucidate sources, molecular indices based on indices among phenanthrene versus anthracene and fluoranthene versus pyrene were used to evaluate the possible source (pyrogenic and petrogenic sources, respectively) of PAH contamination in reclaimed water and surface water. The collected data showed that petrogenic input was predominant at almost all the stations investigated. To discriminate pattern differences and similarities among samples, principal component analysis (PCA) was performed using a correlation matrix. PCA revealed the latent relationships among all the surface water stations investigated and confirmed our analytical results. The analysis results of the ratios and PCA in this study showed that the ratios and PCA could be applied to the surface water investigation to some extent.