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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Weiss-Errico, Mary Jo O'Shea, Kevin E. |
| Description | Country affiliation: United States Author Affiliation: Weiss-Errico MJ ( Department of Chemistry and Biochemistry, Florida International University, 11200 SW Eighth Street, Miami, FL 33199, United States.); O'Shea KE ( Department of Chemistry and Biochemistry, Florida International University, 11200 SW Eighth Street, Miami, FL 33199, United States. Electronic address: osheak@fiu.edu.) |
| Abstract | Perfluorochemicals (PFCs) are contaminants of serious concern because of their toxicological properties, widespread presence in drinking water sources, and incredible stability in the environment. To assess the potential application of -, ß-, and γ-cyclodextrins for PFC remediation, we investigated their complexation with linear fluorinated carboxylic acids, sulfonates, and a sulfonamide with carbon backbones ranging from C4-C9. F Nuclear Magnetic Resonance (NMR) spectroscopy studies demonstrated ß-CD formed the strongest complexes with these PFCs. The polar head group had a modest influence, but for PFCs with backbones longer than six carbons, strong association constants are observed for 1:1 (K â ¼10 M ) and 2:1 (K â ¼10 M ) ß-CD:PFC complexes. Excess ß-CD can be used to complex 99.5% of the longer chain PFCs. Competition studies with adamantane-carboxylic acid and phenol confirmed the nature and persistence of the ß-CD:PFC complex. Detailed analyses of the individual NMR chemical shifts and Job plots indicate the favored positions of the ß-CD along the PFC chain. Solution pH, ionic strength, and the presence of humic acid have modest influence on the ß-CD:PFC complexes. The strong encapsulation of PFCs by ß-CD under a variety of water quality conditions demonstrates the tremendous potential of CD-based materials for the environmental remediation of PFCs. |
| ISSN | 03043894 |
| Journal | Journal of Hazardous Materials |
| Volume Number | 329 |
| e-ISSN | 18733336 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2017-05-05 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Environmental Science Discipline Environmental Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Pollution Waste Management and Disposal Health, Toxicology and Mutagenesis Environmental Engineering |
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