Department of Environmental Sciences, Faculty of Sciences, University of Mazandaran, Babolsar, Iran.
Department of Bioscience Engineering, Faculty of Sciences, University of Antwerp, Antwerpen, Belgium.
J Environ Sci Health A Tox Hazard Subst Environ Eng. 2020;55(7):903-911. doi: 10.1080/10934529.2020.1752589. Epub 2020 Apr 21.
This study focuses on the water-soluble ion concentrations in the washing solution of leaves of different roadside tree species at three sites in Iran to estimate the ionic composition of the dry deposition of ambient air particulates. All considered water-soluble ion concentrations were significantly higher next to the roads with high traffic density compared to the reference site with low traffic density. The PCA results showed that Ca, Mg, [Formula: see text] and [Formula: see text] originated mainly from traffic activities and geological sources, and Na, Cl, K and F from sea salts. In addition to sea salt, K and F were also originated from anthropogenic sources i.e. industrial activities, biomass burning and fluorite mining. Moreover, the concentration of the water-soluble ions depended on species and site. had significantly higher ion concentrations in its leaf washing solution compared to and which indicates is the most suitable species for accumulating of atmospheric dry deposition. From our results, it can be concluded that sites with similar traffic density can have different particle loads and water-soluble ion species, and that concentrations in leaf-washing solutions depend on site conditions and species-specific leaf surface characteristics.
本研究重点关注伊朗三个地点不同路边树种叶片清洗液中的水溶性离子浓度，以估算环境空气颗粒物干沉降的离子组成。与交通密度低的参考地点相比，所有考虑的水溶性离子浓度在交通密度高的道路旁都显著更高。PCA 结果表明，Ca、Mg、[Formula: see text]和[Formula: see text]主要来自交通活动和地质源，而 Na、Cl、K 和 F 则来自海盐。除了海盐，K 和 F 还来自人为源，如工业活动、生物质燃烧和萤石开采。此外，水溶性离子的浓度取决于物种和地点。其叶片清洗液中的离子浓度明显高于[Formula: see text]和[Formula: see text]，这表明[Formula: see text]是最适合积累大气干沉降的物种。根据我们的结果可以得出结论，具有相似交通密度的地点可能具有不同的颗粒物负荷和水溶性离子种类，叶片清洗液中的浓度取决于地点条件和物种特有的叶片表面特征。
