Kim Na Yeong, Loganathan Bommanna G, Kim Gi Beum
Department of Marine Environmental Engineering, Gyeongsang National University, Tongyeong 53064, Republic of Korea; Department of Chemistry and Watershed Studies Institute, Murray State University, Murray 42071, KY, USA.
Department of Chemistry and Watershed Studies Institute, Murray State University, Murray 42071, KY, USA.
Sci Total Environ. 2023 Sep 20;892:164802. doi: 10.1016/j.scitotenv.2023.164802. Epub 2023 Jun 9.
Polycyclic aromatic hydrocarbons (PAHs) are well-known for their recalcitrant properties and biotoxicity in organisms, leading to serious environmental and health problems. Despite various analytical methods available, accurate determination of the bioavailable fraction is warranted in order to evaluate the precise toxic potentials of these compounds. Currently, the passive sampler is used worldwide to measure the bioavailable PAHs in the environment using the equilibrium partitioning principle. In this study, we co-deployed different types of passive samplers, which are linear low-density polyethylene (LLDPE) and low-density polyethylene (LDPE), to determine freely dissolved concentrations (C) of PAHs using the performance reference compounds (PRCs) in Kentucky Lake (KL), Ohio River (OH), and Mississippi River (MS). The fractional equilibrium (f) of BeP-d was observed to be high in LLDPE compared with LDPE in OH and MS. In contrast, the f of all PRCs was similar in both passive samplers in KL due to slow flow velocity. The sum of average freely dissolved PAH concentrations in LLDPE and LDPE during the exposure period were 2.89 and 1.27 ng/L in KL, 8.13 and 3.31 ng/L in OH, and 5.19 and 3.82 ng/L in MS, respectively. The results revealed that LLDPE is a suitable alternative tool to LDPE for both short-term and long-term monitoring of PAHs.
多环芳烃（PAHs）因其在生物体中的顽固性和生物毒性而闻名，会导致严重的环境和健康问题。尽管有各种分析方法，但为了评估这些化合物的确切潜在毒性，仍需准确测定其生物可利用部分。目前，被动采样器在全球范围内被用于利用平衡分配原理测量环境中生物可利用的多环芳烃。在本研究中，我们共同部署了不同类型的被动采样器，即线性低密度聚乙烯（LLDPE）和低密度聚乙烯（LDPE），以利用性能参考化合物（PRCs）测定肯塔基湖（KL）、俄亥俄河（OH）和密西西比河（MS）中多环芳烃的自由溶解浓度（C）。在俄亥俄河和密西西比河中，与低密度聚乙烯相比，观察到线性低密度聚乙烯中苯并[a]芘-d的分数平衡（f）较高。相比之下，由于流速缓慢，肯塔基湖的两种被动采样器中所有性能参考化合物的f值相似。在暴露期间，线性低密度聚乙烯和低密度聚乙烯中多环芳烃平均自由溶解浓度之和在肯塔基湖分别为2.89和1.27 ng/L，在俄亥俄河分别为8.13和3.31 ng/L，在密西西比河分别为5.19和3.82 ng/L。结果表明，对于多环芳烃的短期和长期监测，线性低密度聚乙烯是低密度聚乙烯的合适替代工具。
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