Polycyclic aromatic hydrocarbons in surface sediments held in experimental mesocosms |
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| Authors: | Richard J Pruell James G Quinn |
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| Institution: | 1. Graduate School of Oceanography , University of Rhode Island , Narragansett, Rhode Island, 02882, U.S.A.;2. Environmental Research Laboratory , Science Applications International Corporation, c/o U.S. Environmental Protection Agency , Narragansett, Rhode Island, 02882, U.S.A.;3. Graduate School of Oceanography , University of Rhode Island , Narragansett, Rhode Island, 02882, U.S.A. |
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| Abstract: | Sediment was collected from three locations along a pollution gradient in Narragansett Bay and transplanted to controlled mesocosms. Total hydrocarbons and eleven individual polycyclic aromatic hydrocarbons (PAHs) were measured in these sediments over a period of 394 days. Total hydrocarbon concentrations increased in the “relatively uncontaminated”; (Rhode Island Sound) sediment that was held in the mesocosms, but did not change in the two other sediments. The concentrations of four PAHs: naphthalene, 2‐methyl naphthalene, 1‐methyl naphthalene and biphenyl, decreased in the “contaminated”; (Providence River) sediment during the experiment and the calculated half‐lives for these compounds were 287, 353, 321 and 333 days, respectively. |
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| Keywords: | Fluorinated pilocarpine analogs synthesis cholinergic properties fluoropilocarpine analogs SAR‐receptor site fluoroquaternary pilocarpine analogs biological activity |
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