Estimating Gaseous Mercury Emissions from Contaminated Floodplain Soils to the Atmosphere with Simple Field Measurement Techniques
Estimating Gaseous Mercury Emissions from Contaminated Floodplain Soils to the Atmosphere with Simple Field Measurement Techniques
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DOI：
10.1023/a:1014711831589
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发表时间：
2002-03
期刊：
影响因子：
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通讯作者：
D. Wallschläger;Hans Herbert Kock;W. Schroeder;S. Lindberg;R. Ebinghaus;R. Wilken
中科院分区：
文献类型：
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作者：
D. Wallschläger;Hans Herbert Kock;W. Schroeder;S. Lindberg;R. Ebinghaus;R. Wilken
研究了易北河（德国北部）沿岸洪泛区受污染湿地系统的大气汞排放。研究结果表明，湿地是连接区域生物地球化学汞循环的陆域、水域和大气区室的重要转化和相转移区。通量室测量的通量平均为43±5 ng m-2h-1。此外，还引入了土壤气体探针取样来测定土壤空气中的汞浓度。这项技术在检测和限制土壤中的汞污染方面显示出一定的前景。我们还提出，土壤空气和近地表大气中总气态汞（TGM）的测量，结合简单土壤物理参数，可能适用于基于层流扩散考虑的污染土壤中汞蒸发的半定量计算。结果与其他汞通量测量结果进行了比较，并讨论了量化土壤汞排放的不同方法的优缺点，特别是关于可能的系统偏差。
The atmospheric emission of mercury (Hg) from a contaminatedwetlands system was studied in the floodplains along the riverElbe (Northern Germany). Results suggest that wetlands can beimportant transformation and phase transfer regions, linking theterrestrial, aquatic and atmospheric compartments of regionalbiogeochemical Hg cycles. Fluxes determined by flux chambermeasurements averaged 43 ± 5 ng m-2h-1. Additionally,soil gas probe sampling was introduced to determine mercuryconcentrations in soil air. This technique shows some promise fordetecting and confining mercury contamination in soils. We alsopropose that measurements of total gaseous mercury (TGM) in soilair and the near-surface atmosphere, in combination with simplesoil physical parameters, may be suitable for calculatingsemiquantitative estimates of Hg evaporation from contaminatedsoils, based on laminar diffusion considerations. The results arecompared to other Hg flux measurements, and the advantages anddisadvantages of different approaches to quantify Hg emissionsfrom soils are discussed, especially with regard to possiblesystematic bias.