1. Department of Chemistry Memorial University St. John's Newfoundland and Labrador Canada
2. Now at: Harvard John A. Paulson School of Engineering and Applied Sciences Harvard University Cambridge MA USA
3. Department of Earth and Atmospheric Sciences University of Alberta Edmonton Alberta Canada
4. Department of Chemistry York University Toronto Ontario Canada
5. Aquatic Contaminants Research Division, Environment and Climate Change Canada Burlington Ontario Canada
6. Department of Geography University of Toronto‐Mississauga Mississauga Ontario Canada