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标题：Volcanic emissions and atmospheric pollution: A study of nanoparticles
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作者：Erika M. Trejos ; Luis F.O. Silva ; James C. Hower 等
期刊名称：Geoscience Frontiers
印刷版ISSN：1674-9871
出版年度：2021
卷号：12
期号：2
页码：746-755
DOI：10.1016/j.gsf.2020.08.013
语种：English
出版社：Elsevier
摘要：AbstractThe influence of emissions of an active volcano on the composition of nanoparticles and ultrafine road dust was identified in an urban area of the Andes. Although many cities are close to active volcanoes, few studies have evaluated their influence in road dust composition. Air quality in urban areas is significantly affected by non-exhaust emissions (e.g. road dust, brake wear, tire wear), however, natural sources such as volcanoes also impact the chemical composition of the particles. In this study, elements from volcanic emissions such as Si > Al > Fe > Ca > K > Mg, and SiAl with K were identified as complex hydrates. Similarly, As, Hg, Cd, Pb, As, H, Cd, Pb, V, and salammoniac were observed in nanoparticles and ultrafine material. Mineral composition was detected in the order of quartz> mullite> calcite> kaolinite> illite> goethite> magnetite> zircon> monazite, in addition to salammoniac, a tracer of volcanic sources. The foregoing analysis reflects the importance of carrying out more studies relating the influence of volcanic emissions in road dust in order to protect human health. The road dust load (RD10) ranged between 0.8 and 26.8 mg m−2in the city.Graphical abstractDisplay OmittedHighlights•Road dust loadings in Manizales, Colombia varied within 0.8–26.8 mg m−2.•Road dust loadings have elements characteristic from an active volcano.•Al-Si-K hydrated complexes, Fe, Ti, As, Hg, Cd, Pb and salammoniac were detected in the road dust.•Elements found in NPs and UFPs from road dust present a health risk.
关键词：KeywordsNanoparticlesAmorphous phasesPotential hazardous elementsRoad dustVolcano zone