Use of Multiple Lines of Evidence to Understand Reactive Mercury Concentrations and Chemistry in Hawai’i, Nevada, Maryland, and Utah, USA
Use of Multiple Lines of Evidence to Understand Reactive Mercury Concentrations and Chemistry in Hawai’i, Nevada, Maryland, and Utah, USA
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使用多种证据来了解美国夏威夷、内华达州、马里兰州和犹他州的活性汞浓度和化学性质
DOI：
10.1021/acs.est.0c02283
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发表时间：
2020
影响因子：
11.4
通讯作者：
Zhang, Lei
中科院分区：
文献类型：
--
作者：
Luippold, Adriel;Gustin, Mae Sexauer;Dunham-Cheatham, Sarrah M.;Castro, Mark;Luke, Winston;Lyman, Seth;Zhang, Lei
为了加深我们对汞 (Hg) 生物地球化学循环的理解，需要了解气态氧化汞 (GOM)、颗粒结合汞 (PBM) 和活性汞 (RM = GOM + PBM) 的浓度和化学性质。 UNR-RMAS 2.0 提供了一个可以增进知识的解决方案。从 11/2017 到 02/2019，RMAS 2.0 部署在夏威夷、内华达、马里兰和犹他州，以测试系统性能并了解受不同大气氧化剂影响的地点的 RM。夏威夷莫纳罗亚天文台受到自由对流层和海洋边界层的影响，主要含有 -Br/Cl RM 化合物。内华达州的位置直接毗邻一条主要的州际高速公路，并经历自由对流层的输入，呈现出-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下风处，位于森林地区。犹他州位于一个盆地，受到石油和天然气开采、多日冬季逆温事件以及自由对流层输入的影响。化合物为-Br/Cl或-O、-N和-Br/Cl。鉴定出的 RM 化学形态与空气源区、主要离子化学、标准空气污染物和气象一致。
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.