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首页> 外文期刊>Environmental Science & Technology >In Situ Measurement of PCB Pore Water Concentration Profiles in Activated Carbon-Amended Sediment Using Passive Samplers
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In Situ Measurement of PCB Pore Water Concentration Profiles in Activated Carbon-Amended Sediment Using Passive Samplers

机译:使用无源采样器现场测量活性炭改良沉积物中PCB孔隙水的浓度曲线

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摘要

Vertical pore water profiles of in situ PCBs were determined in a contaminated mudflat in San Francisco Bay, CA, 30 months after treatment using an activated carbon amendment in the upper layer of the sediment. Pore water concentrations were derived from concentrations of PCBs measured in two passive samplers; polyethylene (PE, 51 μm thick) and polyoxymethylene (POM, 17μm thick) at different sediment depths. To calculate pore water concentrations from PCB contents in the passive samplers, an equilibrium approach and a first-order uptake model were applied, using five performance reference compounds to estimate pore water sampling rates. Vertical pore water profiles showed good agreement among the measurement and calculation methods with variations within a factor of 2, which seems reasonable for in situ measurements. The close agreements of pore water estimates for the two sampler materials (PE and POM) and the two methods used to translate uptake in samplers to pore water concentrations demonstrate the robustness and suitability of the passive sampling approach. The application of passive samplers in the sediment presents a promising method for site monitoring and remedial treatment evaluation of sorbent amendment or capping techniques that result in changes of pore water concentrations in the sediment subsurface.
机译:处理后30个月,在沉积物上层中使用活性炭改良剂,在加利福尼亚州旧金山湾的一个受污染的滩涂中确定了原位PCB的垂直孔隙水分布。孔隙水浓度来自两个被动采样器中测量的PCBs浓度;聚乙烯(PE,厚度为51μm)和聚甲醛(POM,厚度为17μm)在不同的沉积深度。为了从被动采样器中的PCB含量计算孔隙水浓度,采用了一种平衡方法和一阶吸收模型,使用五种性能参考化合物估算孔隙水采样率。垂直孔隙水剖面在测量和计算方法之间显示出良好的一致性,变化范围在2倍以内,这对于现场测量似乎是合理的。两种采样器材料(PE和POM)的孔隙水估算值接近一致,以及将采​​样器中的摄取转化为孔隙水浓度的两种方法证明了被动采样方法的稳健性和适用性。被动采样器在沉积物中的应用提供了一种有前途的方法,可用于现场监测和对吸附剂修正或封盖技术进行补救处理评估,从而导致沉积物地下孔隙水浓度的变化。

著录项

  • 来源
    《Environmental Science & Technology》 |2011年第9期|p.4053-4059|共7页
  • 作者单位

    Department of Environmental Technology, Norwegian Geotechnical Institute, 0806 Oslo, Norway;

    Department of Civil and Environmental Engineering, Stanford University, Stanford, California USA 94305-4020;

    Department of Environmental Technology, Norwegian Geotechnical Institute, 0806 Oslo, Norway,Department of Plant and Environmental Sciences, University of Life Sciences, As, Norway,Department of Applied Environmental Sciences, Stockholm University, 10691 Stockholm, Sweden;

    Department of Environmental Technology, Norwegian Geotechnical Institute, 0806 Oslo, Norway,Department of Geosciences, University of Oslo, 0316 Oslo, Norway;

    Department of Environmental Technology, Norwegian Geotechnical Institute, 0806 Oslo, Norway;

    Department of Civil and Environmental Engineering, Stanford University, Stanford, California USA 94305-4020;

  • 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
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