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Air-Water Partitioning of ~(222)Rn and its Dependence on Water Temperature and Salinity

机译：〜（222）Rn在空气中的分配及其对水温和盐度的依赖性

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摘要

Radon is useful as a tracer of certain geophysical processes in marine and aquatic environments. Recent applications include detection of groundwater discharges into surface waters and assessment of air/sea gas piston velocities. Much of the research performed in the past decade has relied on continuous measurements made in the field using a radon stripping unit connected to a radon-in-air detection system. This approach assumes that chemical equilibrium is attained between the water and gas phases and that the resulting air activity can be multiplied by a partition coefficient to obtain the corresponding radon-in-water activity. We report here the results of a series of laboratory experiments that describes the dependence of the partition coefficient upon both water temperature and salinity. Our results show that the temperature dependence for freshwater closely matches results that were previously available. The salinity effect, however, has largely been ignored and our results show that this can result in an overestimation of radon concentrations, especially in cooler, more saline waters. Related overestimates in typical situations range between 10 (warmer less saline waters) and 20% (cooler, more saline waters).
机译：is可用作海洋和水生环境中某些地球物理过程的示踪剂。最近的应用包括检测地下水排放到地表水中以及评估空气/海气活塞速度。过去十年中进行的许多研究都依赖于使用连接到空中ra检测系统的a汽提装置在现场进行的连续测量。该方法假设在水相和气相之间达到化学平衡，并且可以将所得的空气活度乘以分配系数以获得相应的水中in活度。我们在这里报告了一系列实验室实验的结果，这些实验描述了分配系数对水温和盐度的依赖性。我们的结果表明，淡水的温度依赖性与以前可获得的结果非常匹配。然而，盐度效应在很大程度上被忽略了，我们的结果表明，这可能导致对of浓度的高估，尤其是在凉爽，盐水较多的水中。在典型情况下，相关的高估范围介于10（较冷的盐水）和20％（较冷，更多的盐水）之间。

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  • 来源
    《Environmental Science & Technology》 |2012年第7期|p.3905-3911|共7页
  • 作者

    Michael Schubert; Albrecht Paschke; Eric Lieberman; William C. Burnett;

  • 作者单位

    UFZ-Helmholtz Centre for Environmental Research, Permoserstr. 15, 04318 Leipzig, Germany;

    UFZ-Helmholtz Centre for Environmental Research, Permoserstr. 15, 04318 Leipzig, Germany;

    Department of Earth, Ocean and Atmospheric Sciences, Florida State University, Tallahassee, Florida 32306-4320, United States;

    Department of Earth, Ocean and Atmospheric Sciences, Florida State University, Tallahassee, Florida 32306-4320, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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