“New” DDT inputs to North America: Atmospheric deposition |
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| Authors: | RA Rapaport NR Urban PD Capel JE Baker BB Looney SJ Eisenreich E Gorham |
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| Institution: | 1. Environmental Engineering Program, Department of Civil and Mineral Engineering, University of Minnesota, Minneapolis 55455 USA;2. E. I. duPont Co., Aiken, South Carolina USA |
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| Abstract: | Measurement of untransformed (p,p'- and o,p'-) DDT in rain, snow, and peat indicates that input of “new” DDT continues over a large portion of eastern North America. Peat cores obtained from ombrotrophic bogs indicate that current atmospherically derived fluxes are about 10–20% of those which occurred during peak DDT usage (～1960). Since DDT has been banned in North America and considering the magnitude of present fluxes, these residues must result from atmospheric transboundary transport. It is suggested that “new” DDT is being transported from neighboring areas where current use is substantial, Mexico and Central America. |
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| Keywords: | To whom correspondence should be addressed |
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