Potential effect of atmospheric condition on incident light and photo-production of reactive intermediates in freshwater systems
Potential effect of atmospheric condition on incident light and photo-production of reactive intermediates in freshwater systems
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DOI：
10.1016/j.envadv.2023.100346
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发表时间：
2023-01
影响因子：
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通讯作者：
Luthfia Shofi Albi;Zhongyu Guo;Guo Chen;C. Yoshimura
中科院分区：
文献类型：
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作者：
Luthfia Shofi Albi;Zhongyu Guo;Guo Chen;C. Yoshimura
由于现场观测的困难，当地大气条件对水生光化学反应的影响很少被探索。因此，本研究的目的是阐明大气条件，这是无机空气污染，气溶胶污染，臭氧层消耗，对入射光和光产生的活性中间体（RI）的影响。采用SMARTS（太阳光大气辐射传输简单模型）和APEX（环境中存在的异生物质的水光化学）模型模拟了羟基自由基、碳酸根、单线态氧和三重态溶解有机物的波长分布和稳态浓度的变化。结果表明，无机空气污染和气溶胶污染对放射性同位素的产生有减少作用，而臭氧层破坏则增加放射性同位素的产生。其中，无机污染对放射性核素的产生影响最大，在极端污染条件下，预计放射性核素的产生量将减少80%-90%。这项研究还调查了水成分的潜在影响（即，NO3 −、溶解有机物和HCO3 −）对大气条件与RI产生之间关系的影响。不同大气条件下的NO3-浓度对RI的产生影响最大。这项研究强调了在评估有机污染物的光化学持久性时考虑大气条件的重要性。尽管这些结果是模型输出，但它们定量地揭示了大气条件对淡水系统中RI生产的潜在影响。
The effect of local atmospheric conditions on aquatic photochemical reactions has been rarely explored because of the difficulty in field observation. Thus, this study aimed to elucidate the effects of atmospheric conditions, which are inorganic air pollution, aerosol pollution, and ozone layer depletion, on the incident light and photo-production of reactive intermediates (RIs). Models of SMARTS (Simple Model for the Atmospheric Radiative Transfer of Sunshine) and APEX (Aqueous Photochemistry of Environmentally occurring Xenobiotics) were used to simulate the changes in wavelength profile and steady-state concentrations of RIs, which are hydroxyl radical, carbonate radical, singlet oxygen, and triplet-state of dissolved organic matter. Results showed that inorganic air pollution and aerosol pollution have a reduction effect on the production of RIs, while ozone layer depletion increases the production of RIs. Among them, inorganic air pollution has the largest influence on the production of RIs which were expected to reduce by 80%–90% in extreme pollution. This study also investigated the potential effect of water constituents (i.e., NO3−, dissolved organic matter, and HCO3−) on the relation between atmospheric conditions and the production of RIs. NO3−concentration under different atmospheric conditions showed the most influence on the production of RIs. This study highlighted the importance of considering atmospheric conditions when assessing the photochemical persistence of organic pollutants. Even though these results are model output, they quantitatively revealed the potential influence of atmospheric conditions on the production of RIs in freshwater systems.