naa a22 4500 510750044 CHVBK 20180411083101.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11270-013-1608-z doi (NATIONALLICENCE)springer-10.1007/s11270-013-1608-z Anderson Christopher School of Forestry and Wildlife Sciences, Auburn University, 301 Forestry and Wildlife Sciences Building, 36849, Auburn, AL, USA aut Degradation and Composition of Polycyclic Aromatic Hydrocarbons (PAHs) Following Oil Exposure in Experimental Salt Marshes [Elektronische Daten] [Christopher Anderson] Using mesocosms sodded with Juncus roemerianus, this study examined the change in concentration and composition of polycyclic aromatic hydrocarbons (PAHs) immediately following oil exposure. Wetland mesocosms were exposed to oil pre-treated through varying weathering and dosages to induce a range of PAH concentrations. Six trials (consisting of two or three mesocosms) were established using different combinations of oil dosages and weathering durations to elicit a range of initial PAH concentrations in the soil. Wetland soils were sampled per trial and analyzed 2 and 10weeks following oil exposure for PAHs. Based on initial concentrations (2weeks post-oil exposure), a total of 42 analytes (dominated by three-, four-, and five-ring compounds) were consistently detected across all trials. The ∑PAH concentration of wetland trials ranged from 108.1 to 906.2mgkg−1 dry weight. Individual PAH analyte reduction and degradation between sampling dates was calculated as the total percent change in analyte concentration and the percent change in analyte concentration relative to the concentration of biomarker hopane, respectively. All trials showed a significant relationship between PAH analyte molecular weight and its percent reduction and percent degradation. Trials with the highest initial ∑PAH concentration (659.4 and 906.2mgkg−1 dry weight) showed the most PAH loss with significantly greater reduction of high-molecular-weight analytes (four- and five-rings) than the other trials. However, when evaluated based on degradation, all trials showed similar trends of percent degradation relative to molecular weight. Our results suggest that oil loss through hydrologic export (i.e., washout from tidal action) may be important after initial oil exposure, and salt marsh soils may have a certain capacity to retain PAHs in soil. Springer Science+Business Media Dordrecht, 2013 Polycyclic aromatic hydrocarbons nationallicence Oil spill nationallicence Salt marshes nationallicence Juncus roemerianus nationallicence Mesocosms nationallicence Degradation nationallicence Water washing nationallicence Water, Air, & Soil Pollution Springer Netherlands 224/7(2013-07-01), 1-13 0049-6979 224:7<1 2013 224 11270 https://doi.org/10.1007/s11270-013-1608-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11270-013-1608-z text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Anderson Christopher School of Forestry and Wildlife Sciences, Auburn University, 301 Forestry and Wildlife Sciences Building, 36849, Auburn, AL, USA aut NATIONALLICENCE 773 0- Water, Air, & Soil Pollution Springer Netherlands 224/7(2013-07-01), 1-13 0049-6979 224:7<1 2013 224 11270 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer