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首页> 外文期刊>Environmental Science & Technology >Fluxes of Polychlorinated Biphenyls Volatilizing from the Hudson River, New York Measured Using Micrometeorological Approaches
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Fluxes of Polychlorinated Biphenyls Volatilizing from the Hudson River, New York Measured Using Micrometeorological Approaches

机译：使用微气象学方法测量从纽约哈德逊河挥发的多氯联苯的通量

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摘要

This study represents the first time that a micro-meteorological technique, using turbulent transport measurements, has been used to determine the direction and magnitude of air-water exchange of polychlorinated biphenyls (PCBs). The study was conducted during July 2008 on the Hudson River estuary near the Tappan Zee Bridge, which is the site of some of the most serious PCB contamination in the world. Gas-phase ∑PCB concentrations measured at two heights above the water column averaged 1.1 ng m~(-3), and concentrations were usually lower in the upper air sample, indicating net transport of PCBs from the water column to the air. Volatilization PCB fluxes were calculated using the modified Thornthwaite-Holzman equation. Values of friction velocity and atmospheric stability were calculated using the Aerodynamic Gradient and Eddy Correlation techniques. The PCB fluxes were corrected for changes in atmospheric stability using the atmospheric stability factor of water vapor (Φ_w) calculated from empirical formulations which ranged from 1.0 to 3.2 (neutral to stable atmospheric boundary layer conditions). Vertical ∑PCB fluxes ranged from +0.5 μg m~(-2) d ~(-1) to +13 μg m~(-2) d ~(-1). Monothrough tri-homologues accounted for about half of ∑PCB fluxes, with tetra- through hexa-homologue accounting for the other half. This work demonstrates the utility of a micrometeorological approach to measuring the air-water exchange of organic contaminants.
机译：这项研究代表了首次采用湍流传输测量的微气象技术来确定多氯联苯（PCB）的空气-水交换的方向和大小。这项研究是在2008年7月在塔潘Ze河大桥附近的哈德逊河河口进行的，塔普河Ze大桥是世界上一些最严重的PCB污染的地点。在水柱上方两个高度处测得的气相ΣPCB浓度平均为1.1 ng m〜（-3），并且在高空空气样品中的浓度通常较低，这表明PCB从水柱向空气的净迁移。使用修正的Thornthwaite-Holzman方程计算挥发的PCB通量。使用空气动力学梯度和涡流相关技术计算摩擦速度和大气稳定性的值。使用从1.0至3.2（中性到稳定的大气边界层条件）的经验公式计算得出的水蒸气的大气稳定性因子（Φ_w），校正了PCB助焊剂的大气稳定性变化。垂直∑PCB的通量范围为+0.5μgm〜（-2）d〜（-1）至+13μgm〜（-2）d〜（-1）。单通三同系物约占∑PCB通量的一半，四通至六同系物占另一半。这项工作证明了微气象方法在测量有机污染物的空气-水交换中的实用性。

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  • 来源
    《Environmental Science & Technology》 |2012年第2期|p.885-891|共7页
  • 作者

    Andy L. Sandy; Jia Guo; Robert J. Miskewitz; Wade R McGillis; Lisa A. Rodenburg;

  • 作者单位

    Department of Environmental Sciences, Rutgers University, 14 College Farm Road, New Brunswick, New Jersey 08901, United States;

    Department of Environmental Sciences, Rutgers University, 14 College Farm Road, New Brunswick, New Jersey 08901, United States;

    Department of Environmental Sciences, Rutgers University, 14 College Farm Road, New Brunswick, New Jersey 08901, United States;

    Lamont-Doherty Earth Observatory, Earth Institute at Columbia University, Palisades, New York, United States and Earth and Environmental Engineering, Columbia University, New York, New York, United States;

    Department of Environmental Sciences, Rutgers University, 14 College Farm Road, New Brunswick, New Jersey 08901, 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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