• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental toxicology and chemistry >DEVELOPMENT OF A LOW-DENSITY POLYETHYLENE-CONTAINING PASSIVE SAMPLER FOR MEASURING DISSOLVED HYDROPHOBIC ORGANIC COMPOUNDS IN OPEN WATERS
【24h】

DEVELOPMENT OF A LOW-DENSITY POLYETHYLENE-CONTAINING PASSIVE SAMPLER FOR MEASURING DISSOLVED HYDROPHOBIC ORGANIC COMPOUNDS IN OPEN WATERS

机译：低密度聚乙烯无源取样器在开阔水中测定溶解的疏水性有机化合物的开发

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

A passive water sampler with low-density polyethylene (LDPE) as the sorbent phase was built and field-tested for sensing freely dissolved concentrations of hydrophobic organic compounds (HOCs) in fresh and coastal water. Based on the measured LDPE-water partition coefficients (K_(pew)) of 12 polycyclic aromatic hydrocarbons (PAHs) and dichlorodiphenyltrichloroethane (DDT) and its seven metabolites, the detection limits with the passive sampler containing 10-g LDPE ranged from 0.04 to 56.9 pg/L in the equilibrium sampling mode. Furthermore, the utility of the passive sampler in measuring dissolved HOC concentrations in open waters was examined through a comparison with solid-phase extraction combined with liquid-liquid extraction (SPE-LLE) and poly(dimethyl)siloxane (PDMS) coated fiber samplers. The total concentrations of PAHs (3.8-16 ng/L) obtained by the passive sampler were lower than those (87.7-115.5 ng/L) obtained through SPE-LLE. This large difference was probably attributable to slower water exchange in and out of the passive sampler as time progressed because of blockage by algae in eutrophia reservoirs and high dissolved organic carbon contents resulting in higher-than-expected PAH concentrations by SPE-LLE. Furthermore, the concentrations and compositional profiles of DDXs (sum of p,p'-DDT,p,p'-DDD,p,p'-DDE, o,p'-DDT, o,p'-DDD, o,p'-DDE, andp,p'-DDMU) at site A obtained by the passive sampler agreed with the results obtained with the PDMS-coated fibers, suggesting that the passive sampler was able to reasonably quantify dissolved HOCs in seawater.
机译：建立了一个以低密度聚乙烯（LDPE）为吸附剂相的无源水采样器，并进行了现场测试，以检测淡水和沿海水中自由溶解的疏水有机化合物（HOC）的浓度。根据测得的12种多环芳烃（PAHs）和二氯二苯基三氯乙烷（DDT）及其7种代谢物的LDPE水分配系数（K_（pew）），包含10 g LDPE的无源采样器的检出限为0.04至56.9 pg / L在平衡采样模式下。此外，通过与固相萃取结合液-液萃取（SPE-LLE）和聚（二甲基）硅氧烷（PDMS）涂层的纤维采样器进行比较，检验了无源采样器在测量开阔水中溶解的HOC浓度中的实用性。被动采样器获得的PAHs的总浓度（3.8-16 ng / L）低于通过SPE-LLE获得的PAHs的总浓度（87.7-115.5 ng / L）。这种较大的差异可能是由于随着时间的推移进水和进出被动采样器的水交换较慢，这是由于富营养化水库中的藻类堵塞了水，并且高溶解有机碳含量导致SPE-LLE导致的PAH浓度高于预期。此外，DDX的浓度和组成特征（p，p'-DDT，p，p'-DDD，p，p'-DDE，o，p'-DDT，o，p'-DDD，o，p的总和无源采样器在位置A处获得的'-DDE，andp，p'-DDMU）与用PDMS涂覆的纤维获得的结果一致，表明无源采样器能够合理地量化海水中溶解的HOC。

著录项

  • 来源
    《Environmental toxicology and chemistry》 |2012年第5期|p.1012-1018|共7页
  • 作者

    Lian-Jun BAO; Shi-Ping Xu; Yan Liang; Eddy Y. Zeng;

  • 作者单位

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China Graduate School, Chinese Academy of Sciences, Beijing, China;

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China;

    Department of Biology, Hong Kong Baptist University, Hong Kong, China;

    State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, China;

  • 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

    low-density polyethylene; passive sampling; hydrophobic organic compound; open water; field validation;

    机译：低密度聚乙烯被动采样;疏水性有机化合物开放水域;现场验证;

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