Rose-Hulman CHEM 490 - Chemical Characteristics on the Sorption of Selected Endocrine Disruptors (12 pages)

Previewing pages 1, 2, 3, 4 of 12 page document View the full content.
View Full Document

Chemical Characteristics on the Sorption of Selected Endocrine Disruptors



Previewing pages 1, 2, 3, 4 of actual document.

View the full content.
View Full Document
View Full Document

Chemical Characteristics on the Sorption of Selected Endocrine Disruptors

32 views


Pages:
12
School:
Rose-Hulman Institute of Technology
Course:
Chem 490 - Chemical Research
Chemical Research Documents

Unformatted text preview:

Environ Sci Technol 2003 37 2646 2657 Effects of Physical Chemical Characteristics on the Sorption of Selected Endocrine Disruptors by Dissolved Organic Matter Surrogates H I R O S H I Y A M A M O T O HOWARD M LILJESTRAND YOSHIHISA SHIMIZU AND MASATOSHI MORITA Department of Civil Engineering The University of Texas at Austin 1 University Station C1786 Austin Texas 78712 0273 Research Center for Environmental Quality Control Kyoto University Otsu Shiga Japan and National Institute for Environmental Studies Tsukuba Ibaraki Japan Sorption coefficients Koc values of selected endocrine disruptors for a wide variety of dissolved organic matter DOM were measured using fluorescence quenching and solubility enhancement 17 Estradiol estriol 17Rethynylestradiol p nonylphenol p tert octylphenol and dibutylphthalate were selected as endocrine disruptors Aldrich humic acid Suwannee River humic and fulvic acids Nordic fulvic acid alginic acid dextran and tannic acid were selected as DOM surrogates The resulting sorption coefficients log Koc were independent of octanolwater partitioning coefficients log Kow of the selected endocrine disruptors indicating the hydrophobic interaction is not the predominant sorption mechanism Moreover the Koc values for the selected endocrine disruptors especially the steroid estrogens correlated much better with UV absorptivity at 272 nm A272 and phenolic group concentration of the DOM than with either the H O or the O N C atomic ratio of the DOM This suggests that the sorption mechanism is closely related to the interaction between electrons and the hydrogen bonds i e the affinity between phenolic groups of the steroid estrogens and DOM is suggested to provide a relatively large contribution to the overall sorption and yield the Koc values of the steroid estrogens as high as those of the alkylphenols and dibutylphthalate which are suggested to be dominated by nonspecific hydrophobic interaction Introduction It is widely recognized that the sorption



View Full Document

Access the best Study Guides, Lecture Notes and Practice Exams

Loading Unlocking...
Login

Join to view Chemical Characteristics on the Sorption of Selected Endocrine Disruptors and access 3M+ class-specific study document.

or
We will never post anything without your permission.
Don't have an account?
Sign Up

Join to view Chemical Characteristics on the Sorption of Selected Endocrine Disruptors and access 3M+ class-specific study document.

or

By creating an account you agree to our Privacy Policy and Terms Of Use

Already a member?