Aerosol Proteinaceous Matter in Coastal Okinawa, Japan: Influenceof Long-Range Transport and Photochemical Degradation

Li Xiaoying; Zhang Yingyi; Shi LuhanKawamura KimitakaKunwar BhagawatiTakami AkinoriArakaki TakemitsuLai Senchao

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Aerosol Proteinaceous Matter in Coastal Okinawa, Japan: Influenceof Long-Range Transport and Photochemical Degradation

机译：Aerosol Proteinaceous Matter in Coastal Okinawa, Japan: Influenceof Long-Range Transport and Photochemical Degradation

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The characteristics, sources, and atmosphericoxidation processes of marine aerosol proteinaceous matter(APM), including total proteins and free amino acids (FAAs),were investigated using a set of 1 year total suspended particulate(TSP) samples collected in the coastal area of Okinawa Island in thewestern North Pacific rim. The concentrations of APM at this site(total proteins: 0.16 +/- 0.10 mu gm-3and total FAAs: 9.7 +/- 5.6 ngm-3, annual average) are comparable to those of marine APM. Themajor FAA species of APM are also similar to previously reportedmarine APM with glycine as the dominant species (31). Based onthe different seasonal trends and weak correlations of total proteinsand FAAs, we found that they were contributed by different sources,especially with the influence of long-range transport from the Asiancontinent of northern China and Mongolia and the oceanic area of the Bohai Sea, Yellow Sea, and East China Sea. Thephotochemical oxidation processes of high-molecular-weight proteins releasing FAAs (especially glycine) were also considered as animportant factor influencing the characteristics of APM at this site. In addition, we propose a degradation process based on thecorrelation with ozone and ultraviolet radiation, emphasizing their roles in the degradation of proteins. Ourfindings help to deepenthe understanding of atmospheric photochemical reaction processes of organic aerosols

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《Environmental Science & Technology: ES&T》 |2022年第8期|5256-5265|共10页
作者
Li Xiaoying; Zhang Yingyi; Shi LuhanKawamura KimitakaKunwar BhagawatiTakami AkinoriArakaki TakemitsuLai Senchao;
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作者单位

South China Univ Technol;

Chubu Univ;

Natl Inst Environm StudiesUniv Ryukyus;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
marine aerosol; protein; nbsp; amino acid; seasonal variation; long-range transport; photodegradation; UV; FREE AMINO-ACIDS; FINE PARTICULATE MATTER; NORTH PACIFIC RIM; ATMOSPHERIC AEROSOLS; CHEMICAL-CHARACTERIZATION; ORGANIC NITROGEN; AMBIENT AEROSOLS; OUTFLOW REGION; FOG WATERS; OXIDATION;

Aerosol Proteinaceous Matter in Coastal Okinawa, Japan: Influenceof Long-Range Transport and Photochemical Degradation

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