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Characterization and Modeling of Polycyclic Aromatic Compound Uptake into Spruce Tree Wood

机译：云杉树木木材中多环芳族化合物的吸收特性与建模

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摘要

This study highlights the potential of uptake into tree inner wood via direct-transfer through bark, as one contributing mechanism to describe atmospheric uptake of polycyclic aromatic compounds (PACs) into trees. The uptake of PACs into blue spruce tree wood was measured, with wood-air partition coefficients (K_(WOOD_AIR) determined for five PACs. A correlation between the octanol-air partition coefficient (K_(OA) and K_(WOOD_AIR) for these five chemicals was determined and the K_(WOOD_AIR) for 43 PACs were derived. A ratio of solubility (activity) difference between tree wood and octanol was also determined for these chemicals from this correlation. Finally, the derived K_(WOOD) air values were further applied to calculate an air volume sampled by the inner wood layer (cambium) of a tree during a one year growth (sampling) period. PACs with a log K_(WOOD_AIR) > 6 remained in the linear sampling phase over one year of sampling. The results further highlight the important sink that forests provide for atmospheric organic chemicals which should be considered for emissions monitoring and impact assessments from destructive events such as forest fires or clear felling of forests.
机译：这项研究强调了通过树皮直接转移进入树木内部木材的潜力，这是描述大气中多环芳族化合物（PAC）吸收到树木中的一种机制。测量了蓝色云杉树木木材中PAC的吸收量，确定了五个PAC的木材-空气分配系数（K_（WOOD_AIR）。这五个PAC的辛醇-空气分配系数（K_（OA）和K_（WOOD_AIR）之间具有相关性）确定了化学物质并推导出了43个PAC的K_（WOOD_AIR），并根据这些相关性确定了树木和辛醇之间的溶解度（活性）差异比，最后进一步推导了K_（WOOD）空气值应用于计算在一年的生长（采样）期间由树木的内部木材层（形成层）采样的空气量，log K_（WOOD_AIR）> 6的PAC在一年的采样期间仍处于线性采样阶段。结果进一步突出了森林提供大气有机化学物质的重要条件，应将其用于监测，评估和评估毁灭性事件（如森林火灾或森林砍伐等）的排放和影响。

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  • 来源
    《Environmental Science & Technology》 |2017年第9期|5287-5295|共9页
  • 作者

    Cassandra Rauert; Ajitha Kananathalingam; Tom Harner;

  • 作者单位

    Air Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin St. Toronto, Ontario M3H 5T4, Canada;

    Air Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin St. Toronto, Ontario M3H 5T4, Canada ,University of Toronto at Scarborough, 1265 Military Trail Toronto, Ontario M1C 1A4, Canada;

    Air Quality Processes Research Section, Environment and Climate Change Canada, 4905 Dufferin St. Toronto, Ontario M3H 5T4, Canada;

  • 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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