Use of Multiple Lines of Evidence to Understand Reactive Mercury Concentrations and Chemistry in Hawai'i, Nevada, Maryland, and Utah, USA.,Environmental Science & Technology

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Use of Multiple Lines of Evidence to Understand Reactive Mercury Concentrations and Chemistry in Hawai'i, Nevada, Maryland, and Utah, USA.
Environmental Science & Technology ( IF 10.8 ) Pub Date : 2020-06-07 , DOI: 10.1021/acs.est.0c02283
Adriel Luippold ₁ , Mae Sexauer Gustin ₁ , Sarrah M Dunham-Cheatham ₁ , Mark Castro ₂ , Winston Luke ₃ , Seth Lyman ₄ , Lei Zhang ₅

Affiliation

To advance our understanding of the mercury (Hg) biogeochemical cycle, concentrations and chemistry of gaseous oxidized Hg (GOM), particulate-bound Hg (PBM), and reactive Hg (RM = GOM + PBM) need to be known. The UNR-RMAS 2.0 provides a solution that will advance knowledge. From 11/2017 to 02/2019, the RMAS 2.0 was deployed in Hawai’i, Nevada, Maryland, and Utah to test system performance and develop an understanding of RM at locations impacted by different atmospheric oxidants. Mauna Loa Observatory, Hawai’i, impacted by the free troposphere and the marine boundary layer, had primarily −Br/Cl RM compounds. The Nevada location, directly adjacent to a major interstate highway and experiences inputs from the free troposphere, exhibited −Br/Cl, −N, −S, and organic compounds. In Maryland, compounds observed were −N, −S, and organic-Hg. This site is downwind of coal-fired power plants and located in a forested area. The location in Utah is in a basin impacted by oil and natural gas extraction, multiday wintertime inversion episodes, and inputs from the free troposphere. Compounds were −Br/Cl or −O, −N, and −Br/Cl. The chemical forms of RM identified were consistent with the air source areas, predominant ion chemistry, criterion air pollutants, and meteorology.

中文翻译：

在夏威夷，内华达州，马里兰州和美国犹他州，使用多条证据来了解反应性汞浓度和化学反应。

为了加深对汞（Hg）生物地球化学循环的了解，需要知道气态氧化汞（GOM），颗粒结合汞（PBM）和反应性汞（RM = GOM + PBM）的浓度和化学性质。UNR-RMAS 2.0提供了可以提高知识的解决方案。从11/2017到02/2019，RMAS 2.0部署在夏威夷，内华达州，马里兰州和犹他州，以测试系统性能并了解受不同大气氧化剂影响的位置的RM。受自由对流层和海洋边界层影响的夏威夷莫纳罗亚天文台主要含有-Br / Cl RM化合物。内华达州的位置与主要的州际公路直接相邻，并且经历了自由对流层的输入，显示出-Br / Cl，-N，-S和有机化合物。在马里兰州，观察到的化合物为-N，-S和有机汞。该地点位于燃煤发电厂的顺风处，位于森林地区。犹他州的位置在一个盆地中，受石油和天然气开采，冬季多日反演事件以及对流层自由输入的影响。化合物为-Br / Cl或-O，-N和-Br / Cl。鉴定出的RM的化学形式与空气源区域，主要的离子化学，标准的空气污染物和气象学一致。

更新日期：2020-07-07

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