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雷州近海、流沙湾和深圳湾分别代表近海开阔海域和海湾,探讨它们在PAHs浓度水平、成份组成、空间分布和来源方面的特征差异.研究表明,15种PAHs单体在雷州近海、流沙湾和深圳湾的检出率均达100%,组份构成以3环和4环为主,其中Phe、Fla、Pry和Bbf是主要成份;由于水体交换等因素影响,海湾PAHs浓度水平明显高于近海,ΣPAHs的浓度变化趋势为流沙湾>深圳湾>雷州近海.雷州近海ΣPAHs空间分布特征表现为东部<南部<西部,3环百分含量依次减少,4～6环相反;与氮、磷等水质指标研究相同,深圳湾和流沙湾ΣPAHs浓度水平养殖区>非养殖区,湾内>湾外,其中养殖区站点以4环为主,非养殖区以3环为主.PAHs特征比值显示石化燃烧和生物燃烧,以及石油源等是雷州近海、流沙湾和深圳湾PAHs的主要来源.
Leizhou offshore, Lhasa Bay and Shenzhen Bay represent open sea areas and gulfs, respectively, and discuss their differences in PAHs concentrations, composition, spatial distribution and origin.The results show that 15 kinds of PAHs monomers in Leizhou offshore, The detection rate of Shenzhen Bay was 100%, and the components were mainly composed of 3-ring and 4-ring, of which Phe, Fla, Pry and Bbf were the main components. Because of water exchange and other factors, the concentration of PAHs in the Gulf was significantly higher than that of offshore , ΣPAHs concentration trend of the Lhasa Bay> Shenzhen Bay> Leizhou offshore Leizhou estuary ΣPAHs spatial distribution of the performance of the eastern non-aquaculture area, Bay in> bay, including aquaculture site site with the main ring 4, non-aquaculture area to ring 3. PAHs characteristic ratio shows petrochemical combustion and Biofuels, as well as oil sources, are the main sources of PAHs in Leizhou offshore, Lisha Bay and Shenzhen Bay.