A Comparison of Water Solubility Enhancements of Organic Solutes by Aquatic Humic Materials and Commercial Humic Acids

Cary T. Chiou, Daniel E. Kile, Terry I. Brinton, Ronald L. Malcolm, Jerry A. Leenheer, Patrick MacCarthy

研究成果: Article同行評審

344 引文 斯高帕斯(Scopus)

摘要

Water solubility enhancements of 1,1-bis(p-chloro-phenyl)-2,2,2-trichloroethane (p,p’-DDT), 2,4,5,2’,5’-pentachlorobiphenyl (2,4,5,2’,5’-PCB), and 2,4,4’-tri-chlorobiphenyl (2,4,4’-PCB) by dissolved organic matter have been studied with the following samples: (1) acidic water samples from the Suwannee River, Georgia, and the Sopchoppy River, Florida; (2) a humic extract of a nearly neutral pH water from the Calcasieu River, Louisiana; (3) commercial humic acids from the Aldrich Chemical Co. and Fluka-Tridom Chemical Corp. The calculated partition coefficients on a dissolved organic carbon basis (Kdoc) for organic solutes with water samples and aquatic humic extracts from this and earlier studies indicate that the enhancement effect varies with the molecular composition of the aquatic humic materials. The Kdoc values with water and aquatic humic samples are, however, far less than the observed Kdoc values obtained with the two commercial samples, by factors of about 4–20. In view of this finding, one should be cautious in interpreting the effects of the dissolved organic matter on solubility enhancement of organic solutes on the basis of the use of commercial humic acids.

原文English
頁(從 - 到)1231-1234
頁數4
期刊Environmental Science and Technology
21
發行號12
DOIs
出版狀態Published - 1987 1月 1

All Science Journal Classification (ASJC) codes

  • 化學 (全部)
  • 環境化學

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