Guangxi Laboratory on the Study of Coral Reefs in the South China Sea; Coral Reef Research Center of China; School of Marine Sciences, Guangxi University, Nanning 530004, China; Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519080, China.
Guangxi Laboratory on the Study of Coral Reefs in the South China Sea; Coral Reef Research Center of China; School of Marine Sciences, Guangxi University, Nanning 530004, China.
J Hazard Mater. 2021 Jun 15;412:125214. doi: 10.1016/j.jhazmat.2021.125214. Epub 2021 Jan 28.
Our previous study revealed PAHs' wide occurrence in corals from multiple coral reef regions (CRRs) in the South China Sea. However, little is known about their occurrence, distribution, fate, and sources in the ambient environment of these CRRs. This study aimed to resolve these research gaps. The results showed ∑PAHs (total concentrations of 15 US EPA priority controlled PAHs exclude naphthalene) in the atmosphere (gas-phase: 0.31-49.6 ng m; particle-phase: 2.6-649 pg m) were mainly influenced by air mass origins. Southwesterly wind caused higher ∑PAHs than the southeasterly wind. The ∑PAHs in seawater from the nearshore (462 ± 244 ng L) was higher than that from offshore Zhongsha Islands (80.5 ± 72.1 ng L) because of the effect of terrigenous pollution and ocean current. Source apportionment indicated that the mixed sources of spilled oil and combustion from neighboring countries were the main contributors to PAHs in these CRRs. The total deposition fluxes showed that PAHs tended to migrate from the atmosphere to seawater. Global warming may inhibit this process, but PAHs still have a migration pattern of atmosphere-ocean-corals, which will further increase the environmental pressure on coral reef ecology.
我们之前的研究揭示了多地区南海珊瑚中普遍存在的多环芳烃（PAHs）。然而，对于这些珊瑚礁地区环境中 PAHs 的存在、分布、归宿和来源，人们知之甚少。本研究旨在解决这些研究空白。结果表明，大气中∑PAHs（总浓度为 15 种美国环保署优先控制的 PAHs ，不包括萘）（气相：0.31-49.6ng/m；颗粒相：2.6-649pg/m）主要受气团来源的影响。西南风比东南风导致更高的∑PAHs。由于陆源污染和海流的影响，近岸海水（462±244ng/L）中的∑PAHs 高于中沙群岛（80.5±72.1ng/L）。来源分配表明，邻国溢油和燃烧的混合来源是这些珊瑚礁地区 PAHs 的主要贡献者。总沉积通量表明，PAHs 倾向于从大气向海水迁移。全球变暖可能会抑制这一过程，但 PAHs 仍具有大气-海洋-珊瑚的迁移模式，这将进一步增加对珊瑚礁生态的环境压力。
