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首页> 外文会议>International Conference on Wetlands amp; Remediation Salt Lake City, Utah, November 16-17, 1999 >Plant-air partitioning of chlorobenzenes in wetland vegetation at a superfund site
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Plant-air partitioning of chlorobenzenes in wetland vegetation at a superfund site

机译：超级基金现场湿地植被中氯苯的植物-空气分配

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摘要

Partitioning of hexachlorobenzene (HCB), lower chlorinated benzenes and hexachlorobutadiene (HCBD) betweent he plant-air interface was measured inf ield and laboratory studies. Bark, leaf, and leaf litter of Baldcypress (Taxodium distichum) and Black Willow (Salix nigra) tress were collected from the Petro Processors Inc. (PPI) Superfund site and were analyzed for the concentrations of HCB, HCBD, and their breakdown products. It was determined that significant quantities of chlorobenzenes are present in the various plant tissues analyzed, with bark having the highest concentrations. Spatial relationships for the concentrations of the chlorobenzenes were developed for the two experimental locations, and two species of interest. In addition, two controlled environment chamber experiments were conducted to determine fundamental partitioning coefficients for target compounds on Black Willow leaves. A first order kinetic model was applied to the experimental results to determine a plant-air equilibrium partition coefficient (K_(PA)) for HCB. The experimentally determined K_(PA) was found to be in agreemnet with values published for other plant species, and was subsequently used to estimate the expected air concentrations of HCB at the PPI site.
机译：在工厂和空气之间进行了六氯苯（HCB），低级氯苯和六氯丁二烯（HCBD）之间的分配的测量和实验室研究。从Petro Processors Inc.（PPI）超级基金站点收集了秃头柏（Taxodium distichum）和黑柳（Salix nigra）的树皮，叶子和凋落物，并分析了HCB，HCBD及其分解产物的浓度。已确定在分析的各种植物组织中存在大量的氯苯，其中树皮的浓度最高。在两个实验地点和两个感兴趣的物种之间建立了氯苯浓度的空间关系。此外，进行了两个受控环境室实验，以确定黑柳叶上目标化合物的基本分配系数。将一阶动力学模型应用于实验结果，以确定六氯代苯的植物-空气平衡分配系数（K_（PA））。发现实验确定的K_（PA）与其他植物物种的公布值一致，随后用于估算PPI站点上六氯苯的预期空气浓度。

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