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Atmospheric deposition of biologically relevant trace metals in the eastern Adriatic coastal area
Chemosphere ( IF 8.8 ) Pub Date : 2021-06-17 , DOI: 10.1016/j.chemosphere.2021.131178
Abra Penezić 1 , Andrea Milinković 1 , Saranda Bakija Alempijević 1 , Silva Žužul 2 , Sanja Frka 1
Affiliation  

Aerosol (PM10), bulk deposition, sea surface microlayer (SML) and underlying water (ULW) samples were collected simultaneously during a field campaign at the middle Adriatic coastal site between February and July 2019, to assess the impact of atmospheric deposition (AD) of biologically relevant trace metals (TM) (Zn, Cu, Co, Ni, Cd and Pb) on the sea surface responses in an oligotrophic coastal region. Anthropogenic emissions from continental Europe, alongside local/regional domestic heating, likely affected the concentrations of Zn, Cd and Pb in aerosols during winter-early spring, while traffic emissions during the tourist season impacted Ni, Co and Cu aerosol concentrations. Additionally, open-fire biomass burning (BB) episodes caused considerable TM concentration increases, while Saharan dust intrusion in spring led to a 10-fold increase in Co concentrations in PM10 samples. These intensive episodes significantly affected the bulk deposition fluxes of TMs, showing that a small number of such extreme events, common to Mediterranean coastal areas, could be responsible for most of the AD. Enrichments and concentrations of total TMs in SML samples collected following BB events indicated that such events, along with high precipitation, influenced TM partitioning in surface water layers. We estimated that AD represents a significant source of TM to the shallow middle Adriatic coastal area, highlighting the need to further explore the atmosphere-sea surface links, to expand our understanding of the biogeochemistry of these important micronutrients and pollutants, including their impact on the aquatic community.



中文翻译:

亚得里亚海东部沿海地区生物相关微量金属的大气沉积

气溶胶(PM 10),在 2019 年 2 月至 7 月期间在亚得里亚海中部沿海地区的一次野外活动期间同时收集了大量沉积、海面微层 (SML) 和底层水 (ULW) 样本,以评估与生物相关的大气沉积 (AD) 的影响。微量金属 (TM)(Zn、Cu、Co、Ni、Cd 和 Pb)对贫营养沿海地区海面响应的影响。欧洲大陆的人为排放以及当地/区域的国内供暖可能影响了冬季-早春气溶胶中锌、镉和铅的浓度,而旅游季节的交通排放影响了镍、钴和铜的气溶胶浓度。此外,明火生物质燃烧 (BB) 事件导致 TM 浓度显着增加,10 个样品。这些密集事件显着影响了 TM 的大量沉积通量,表明地中海沿岸地区常见的少数此类极端事件可能是大部分 AD 的原因。在 BB 事件后收集的 SML 样品中总 TM 的富集和浓度表明,这些事件以及高降水影响了地表水层中的 TM 分配。我们估计 AD 是亚得里亚海中浅海沿岸地区 TM 的一个重要来源,强调需要进一步探索大气-海面联系,以扩大我们对这些重要微量营养素和污染物的生物地球化学的理解,包括它们对海洋的影响。水生社区。

更新日期:2021-06-19
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