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Effects of Static vs. Tidal Hydrology on Pollutant Transformation in Wetland Sediments

W. James Catallo*,a and Thomas Junkb

a Lab. for Ecological Chemistry, CBS Dep., School of Veterinary Medicine, Louisiana State Univ., Baton Rouge, LA 70803
b Dep. of Chemistry, Univ. of Louisiana-Monroe, Monroe, LA



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  		Fig. 1. Schematic diagram of the hydrodynamic microcosms used in this study for all treatments.

 


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  		Fig. 2. Chemical structures of the NSH target compounds examined in this study.

 


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  		Fig. 3. Typical redox potential (Eh) time series observed in the tidal microcosms. Sample rate = 1/h.

 


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  		Fig. 4. Typical sediment trace gas spectra observed in the hydrologic treatments. Tidal and drained systems were similar throughout the runs.

 


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  		Fig. 5. Time course NSH transformation profiles in the well-drained (oxidized) sediment treatments.

 


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  		Fig. 6. Time course NSH transformation profiles in the flooded sediment treatments.

 


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  		Fig. 7. Time course NSH transformation profiles in the tidal (diurnally pulsed) sediment treatments.

 




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