Abstract
Marbon is isomeric with Dechlorane Plus (DP). Both are produced by the Diels− Alder condensation of hexachlorocyclopentadiene with cyclic dienes, and both have elemental compositions of C18H12Cl12. Dechlorane Plus is commonly found in the environment throughout the world, but Marbon has, so far, only been detected at low levels in one sediment core collected near the mouth of the Niagara River in Lake Ontario. Here we report on the concentrations of Marbon and anti-DP in 59 water samples from five Lake Michigan tributaries [the Grand, Kalamazoo, St. Joseph, and Lower Fox Rivers, and the Indiana Harbor and Ship Canal (IHSC)], 10 surface sediment samples from the IHSC, and 2 surface sediment samples from the Chicago Sanitary and Ship Canal. Three Marbon diastereomers were detected in the water and sediment samples from the IHSC, which is far from the location of its previous detection in Lake Ontario. The sum of the concentrations of the three Marbons was greater in the water from the IHSC (N = 11, median =150 pg/L) compared to those in water from the other four tributaries (N = 11−13, medians =0.9−2.0 pg/L). Marbon concentrations in sediment samples from the IHSC were up to 450 ng/g dry weight. Anti-DP was also measured for comparison. Its concentrations were not significantly different among the water samples, but its sediment concentrations in the IHSC were significantly correlated with those of Marbon. The source of Marbon contamination in the IHSC is not clear.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 13232-13238 |
| Number of pages | 7 |
| Journal | Environmental Science and Technology |
| Volume | 50 |
| Issue number | 24 |
| DOIs | |
| State | Published - Dec 20 2016 |
| Externally published | Yes |
Bibliographical note
Funding Information:Funding for this project was provided by U.S. Environmental Protection Agency’s Great Lakes National Program Office as part of the Great Lakes Restoration Initiative. We thank the site operators Brian Heissenberger, David Housner, Thomas Weaver, and Derrick Hubbell for collecting the water samples; Andres Martinez and Keri Hornbuckle from the University of Iowa for the IHSC sediment samples; and Christina Gouliaras from Toronto Research Chemicals for helpful discussions. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.
Publisher Copyright:
© 2016 American Chemical Society.