Pan Yuanyuan, Shi Yali, Wang Yawei, Cai Yaqi, Jiang Guibin
State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Science, Chinese Academy of Sciences, P.O. Box 2871, Beijing, 100085, China.
J Environ Monit. 2010 Feb;12(2):508-13. doi: 10.1039/b909302h. Epub 2009 Oct 14.
The occurrence of perfluorinated compounds (PFCs) in the Bohai Sea region, a semi-enclosed bay in north China, was assessed in this present study. Nine different PFCs were measured in eleven mollusk species (soft tissues) collected from 9 coastal cities. Most of the analyzed PFCs could be detected in the samples, with perfluorooctanoic acid (PFOA) as the prominent PFC, although perfluorooctane sulfonate (PFOS) has been shown to be more bioaccumulative than PFOA by other studies. The detection frequency of PFOA was 72%. Significantly high levels of PFOA were found in Mactra veneriformis, Scapharca subcrenata and Meretrix meretrix Linnaeus, with mean concentrations at 31.3 ng g(-1), 15.0 ng g(-1) and 12.2 ng g(-1), respectively (dry weight). The distinct distribution of PFOA in these species can be used as a potential indicator of the bioaccumulation capacity. PFOS was found in mollusks at lower concentrations and frequency (61%). Positive linear regressions were found between perfluoroheptanoic acid (PFHpA), PFOA and PFOS (p < 0.01, n = 123), suggesting that these compounds may come from a similar origin of exposure and accumulation. It is suspected that higher emissions from usage or production of PFC related products might exist in Shouguang City, since the majority of the elevated concentrations of PFOA or PFOS were found in Shouguang. As the PFC concentrations in mollusks were comparatively low, humans are not likely to be at risk of PFC exposure through the daily consumption of these seafoods.
本研究评估了中国北方半封闭海湾渤海地区全氟化合物（PFCs）的存在情况。在从9个沿海城市采集的11种软体动物（软组织）中测量了9种不同的全氟化合物。大部分分析的全氟化合物在样本中都能被检测到，全氟辛酸（PFOA）是主要的全氟化合物，尽管其他研究表明全氟辛烷磺酸（PFOS）比PFOA具有更强的生物累积性。PFOA的检测频率为72%。在文蛤、毛蚶和泥蚶中发现了显著高水平的PFOA，平均浓度分别为31.3 ng g⁻¹、15.0 ng g⁻¹和12.2 ng g⁻¹（干重）。PFOA在这些物种中的独特分布可作为生物累积能力的潜在指标。在软体动物中发现PFOS的浓度和频率较低（61%）。全氟庚酸（PFHpA）、PFOA和PFOS之间存在正线性回归（p < 0.01，n = 123），表明这些化合物可能来自相似的暴露和累积源。由于大部分PFOA或PFOS浓度升高的样本都来自寿光，怀疑寿光市可能存在与全氟化合物相关产品使用或生产的较高排放。由于软体动物中的全氟化合物浓度相对较低，人类通过日常食用这些海鲜不太可能面临全氟化合物暴露的风险。
