Occurrence and distribution of Polycyclic aromatic hydrocarbons (PAHs) in seawater, sediments and corals from Hainan Island, China.
Occurrence and distribution of Polycyclic aromatic hydrocarbons (PAHs) in seawater, sediments and corals from Hainan Island, China.
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DOI：
10.1016/j.ecoenv.2018.01.006
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发表时间：
2018-05
影响因子：
6.8
通讯作者：
Nan Xiang;Chunxia Jiang;Tinghan Yang;Ping Li;Haihua Wang;Yanli Xie;Sennan Li;Hailong Zhou;X. Diao
中科院分区：
文献类型：
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作者：
Nan Xiang;Chunxia Jiang;Tinghan Yang;Ping Li;Haihua Wang;Yanli Xie;Sennan Li;Hailong Zhou;X. Diao
采用气相色谱-质谱联用技术（GC-MS）对海南岛珊瑚、环境海水和沉积物中16种美国EPA优先监测的多环芳烃（PAHs）进行了分析。海水中多环芳烃总浓度（∑PAHs）为273.79 ~ 407.82 ng/L。此外，珊瑚中∑PAHs的含量（333.88-727.03 ng/g dw）显著高于环境沉积物（67.29-196.99 ng/g dw）（P< 0.05），表明珊瑚对多环芳烃具有生物富集能力。结果表明，孔雀草S2站的∑PAHs含量最高，也是海水和沉积物中∑PAHs含量最高的站。块状珊瑚比分枝珊瑚更富含多环芳烃。虽然2环和3环多环芳烃在珊瑚和周围环境中占优势，占总多环芳烃的69.27-80.46%，但珊瑚中高分子量多环芳烃（4-6环）的含量也显示了其对珊瑚和珊瑚礁周围生物的潜在危害。生物-沉积物累积因子（BSAF）是指水生生物从周围沉积物中吸收污染物的指标。log BSAF和logKow（疏水性）之间的相关性较差，表明珊瑚中的PAHs可能不是从环境沉积物中积累的，而是通过海水吸收、共生和摄食等途径积累的。根据我们的数据，在典型的珊瑚礁生态系统的长期生态监测结合多环芳烃对珊瑚的生态毒理学试验是必要的，以确定多环芳烃对珊瑚礁的影响。
The levels of 16 US EPA priority polycyclic aromatic hydrocarbons (PAHs) were investigated in corals, ambient seawater and sediments of Hainan Island, China, using gas chromatography - mass spectrometry (GC-MS). The total PAHs (∑PAHs) concentrations ranged from 273.79 to 407.82 ng/L in seawater. Besides, the concentrations of ∑PAHs in corals 333.88–727.03 ng/g dw) were markedly (P< 0.05) higher than ambient sediments 67.29–196.99 ng/g dw), demonstrating the bioaccumulation ability of PAHs by corals. The highest concentration of ∑PAHs was detected at site S2 inPavonadecussate, which also bore the highest ∑PAHs levels in both seawater and sediments. The massive corals were more enriched with PAHs than the branching corals. Although 2 and 3-ring PAHs were predominant and accounted for 69.27–80.46% of the ∑PAHs in corals and ambient environment, the levels of high molecular weight (HMW) PAHs (4–6 ring) in corals also demonstrated their potential dangers for corals and organisms around coral reefs. Biota-sediment accumulation factor (BSAF) refers to an index of the pollutant absorbed by aquatic organisms from the surrounding sediments. The poor correlation between log BSAF and logKow(hydrophobicity) indicated that PAHs in corals maybe not bioaccumulate from the ambient sediments but through pathways like absorbing from seawater, symbiosis, and feeding. Based on our data, long-term ecological monitoring in typical coral reef ecosystems combined with ecotoxicological tests of PAHs on corals is necessary to determine the impacts of PAHs on coral reefs.