Sorption of aromatic organic pollutants to grasses from water

Jason P. Barbour, James A. Smith, Cary T. Chiou

研究成果: Article同行評審

46 引文 斯高帕斯(Scopus)

摘要

The influence of plant lipids on the equilibrium sorption of three aromatic solutes from water was studied. The plant-water sorption isotherms of benzene, 1,2-dichlorobenzene, and phenanthrene were measured over a large range of solute concentrations using sealed vessels containing water, dried plant material, and solute. The plant materials studied include the shoots of annual rye, tall fescue, red fescue, and spinach as well as the roots of annual rye. Seven out of eight sorption isotherms were linear with no evidence of competitive effects between the solutes. For a given plant type, the sorption coefficient increased with decreasing solute water solubility. For a given solute, sorption increased with increasing plant lipid content. The estimated lipid-water partition coefficients of individual solutes were found to be significantly greater than the corresponding octanol-water partition coefficients. This indicates that plant lipids are a more effective partition solvent than octanol for the studied aromatic compounds. As expected, the solute lipid-water partition coefficients were log-linearly related to the respective water solubilities. For the compounds studied, partitioning into the lipids is believed to be the primary sorption mechanism.

原文English
頁(從 - 到)8369-8373
頁數5
期刊Environmental Science and Technology
39
發行號21
DOIs
出版狀態Published - 2005 11月 1

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 環境化學

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