...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Use of Depuration Compounds in Passive Air Samplers: Results from Active Sampling-Supported Field Deployment Potential Uses, and Recommendations
【24h】

Use of Depuration Compounds in Passive Air Samplers: Results from Active Sampling-Supported Field Deployment Potential Uses, and Recommendations

机译：被动空气采样器中净化化合物的使用：主动采样支持的现场部署潜在用途和建议的结果

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Depuration compounds (DCs) are added to passive air samplers (PAS) prior to deployment to account for the wind-dependency of the sampling rate for gas-phase compounds. This correction is particularly useful for providing comparable data for samplers that are deployed in different environments and subject to different meteorological conditions such as wind speeds. Two types of PAS-the polyurethane foam (PUF) disk sampler and semipermeable membrane devices (SPMDs)-were deployed at eight heights on a 100 m tower to test whether the DC approach could yield air concentrations profiles for PCBs and organochlorine pesticides and account for the wind speed gradient with height. Average wind speeds ranged from 0.3 to 4.5 m s~(-1) over the 40 day deployment, increasing with height. Two low volume active air samples (AAS), one collected at 25 m and one at 73 m over the 40 day deployment showed no significant concentration differences for target compounds. As expected, the target compounds taken up by PAS reflected the wind profile with height This wind-dependency of the PAS was also reflected in the results of the DCs. A correction based on the DC approach successfully accounted for the effect of wind on PAS sampling rates, yielding a profile consistent with the AAS. Interestingly, in terms of absolute air concentrations, there were differences between the AAS and PAS-derived values for some target compounds. These were attributed to different sampling characteristics of the two approaches that may have resulted in slightly different air masses being sampled. Based on the results of this study, guidelines are presented for the use of DCs and for the calibration of PAS using AAS.
机译：在部署之前，将净化化合物（DC）添加到被动式空气采样器（PAS）中，以说明气相化合物采样率随风的变化。此校正对于为部署在不同环境中并受不同气象条件（例如风速）影响的采样器提供可比较的数据特别有用。在100 m塔的八个高度上部署了两种类型的PAS，即聚氨酯泡沫（PUF）圆盘采样器和半透膜设备（SPMD），以测试DC方法是否可以产生PCB和有机氯农药的空气浓度曲线并说明风速梯度与高度的关系。在40天的部署中，平均风速从0.3到4.5 m s〜（-1），随高度增加。在40天的部署过程中，两个小体积活性空气样品（AAS）（在25 m处采集，一个在73 m处采集）显示目标化合物的浓度无明显差异。不出所料，PAS吸收的目标化合物反映了高度的风廓线。DCS的结果也反映了PAS对风的依赖性。基于DC方法的校正成功地说明了风对PAS采样率的影响，得出的曲线与AAS一致。有趣的是，就绝对空气浓度而言，某些目标化合物的AAS和PAS衍生值之间存在差异。这些归因于两种方法的不同采样特性，这可能导致采样的空气质量略有不同。根据这项研究的结果，提出了使用DC以及使用AAS校准PAS的指南。

著录项

  • 来源
    《Environmental Science & Technology》 |2009年第9期|3227-3232|共6页
  • 作者

    CLAUDIA MOECKEL; TOM HARNER; LUCA NIZZETTO; BO STRANDBERG; ANDERS LINDROTH; KEVIN C. JONES;

  • 作者单位

    Centre for Chemicals Management, Lancaster Environment Centre, Lancaster University, Lancaster LAI 4YQ, U.K.;

    Atmospheric Science and Technology Directorate, Environment Canada, Toronto M3H 5T4, Canada;

    Centre for Chemicals Management, Lancaster Environment Centre, Lancaster University, Lancaster LAI 4YQ, U.K.;

    Sahlgrenska Academy, Department of Public Health and Community Medicine, University of Gothenburg SE-40530 Gothenburg, Sweden;

    Department of Physical Geography and Ecosystems Analysis, Lund University, Soelvegatan 12, 22362 Lund, Sweden;

    Centre for Chemicals Management, Lancaster Environment Centre, Lancaster University, Lancaster LAI 4YQ, U.K.;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号