【摘要】 本文基于烟台四十里湾养殖区及邻近海域的观测，系统研究了两类挥发性有机物（VOCs）——单环芳烃（BTEX）和短链非甲烷烃（NMHCs）的分布特征、季节变化及控制因素，旨在揭示扇贝养殖对VOCs生产和释放的影响。结果表明，VOCs浓度在养殖区内外及不同养殖时期均存在显著差异。养殖区BTEX平均浓度比非养殖区低40%，主要由于扇贝对其具有富集作用，且捕捞期富集能力最强。此外，扇贝对BTEX各组分的富集作用也存在差异，正辛醇-水分配系数(K_ow)越高，浓度降幅越大。相反，养殖区NMHCs平均浓度高出非养殖区约12%，与扇贝摄食和排泄促进浮游植物释放NMHCs有关。扇贝养殖导致BTEX海-气通量降低、NMHCs海-气通量升高，最终使该海域VOCs排放对臭氧和二次有机气溶胶生成潜势的贡献分别降低48%和42%。更多还原

【Abstract】 Based on field observations in the Yantai Sishili bay aquaculture area and its adjacent waters, the distribution characteristics, seasonal variations, and controlling factors of two representative volatile organic compounds（VOCs）—monocyclic aromatic hydrocarbons（BTEX） and short-chain non-methane hydrocarbons（NMHCs） were systematically investigated, to reveal the impacts of scallop farming on the productions and releases of VOCs. The analysis results showed that there were significant differences in VOCs between the different aquaculture periods, as well as between the aquaculture and non-aquaculture areas. The scallops’ enrichment effect on BTEX significantly reduced the BTEX concentration in the seawater of the aquaculture area, with BTEX concentrations in the aquaculture area being 40% lower than that in the non-aquaculture area.The enrichment effect of scallops on BTEX in seawater varied at different stages of scallop aquaculture, with the strongest enrichment ability during the harvest period. In addition, there were differences in the enrichment effect of scallops on the components of BTEX, with a higher octanol-water partition coefficient(K_ow) value corresponding to a greater reduction in concentration. In comparison, the mean concentration of NMHCs in the aquaculture area was approximately 12% higher than that in the non-aquaculture area, which could be attributed to the grazing of phytoplankton by scallops, which promoted the production and release of NMHCs in the aquaculture area. Scallop aquaculture results in a reduction of sea-air BTEX flux and an increase of sea-air NMHCs flux, ultimately leading to a 48% and 42% decrease in the contribution of VOCs emissions from this marine area to ozone and secondary organic aerosol formation potential, respectively.更多还原