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Transformation of Iopromide Due to Redox Gradients in Sediments of the Hyporheic Zone
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class="card"> <div class="card-body"><strong>Paper Count:</strong> 87414</div> </div> </div> </div> <div class="card publication-listing mt-3 mb-3"> <h5 class="card-header" style="font-size:.9rem">Transformation of Iopromide Due to Redox Gradients in Sediments of the Hyporheic Zone</h5> <div class="card-body"> <p class="card-text"><strong>Authors:</strong> <a href="https://publications.waset.org/abstracts/search?q=Niranjan%20Mukherjee">Niranjan Mukherjee</a>, <a href="https://publications.waset.org/abstracts/search?q=Burga%20Braun"> Burga Braun</a>, <a href="https://publications.waset.org/abstracts/search?q=Ulrich%20Szewzyk"> Ulrich Szewzyk</a> </p> <p class="card-text"><strong>Abstract:</strong></p> Recalcitrant pharmaceuticals are increasingly found in urban water systems forced by demographic changes. The groundwater-surface water interface, or the hyporheic zone, is known for its impressive self-purification capacity of water bodies. Redox gradients present in this zone provide a wide range of electron acceptors and harbour diverse microbial communities. Biotic transformations of pharmaceuticals in this zone have been demonstrated, but not much information is available on the kind of communities bringing about these transformations. Therefore, bioreactors using sediment from the hyporheic zone of a river in Berlin were set up and fed with iopromide, a recalcitrant iodinated X-ray contrast medium. Iopromide, who鈥檚 many oxic and anoxic transformation products have been characterized, was shown to be transformed in such a bioreactor as it passes along the gradient. Many deiodinated transformation products of iopromide could be identified at the outlet of the reactor. In our experiments, it was seen that at the same depths of the column, the transformation of iopromide increased over time. This could be an indication of the microbial communities in the sediment adapting to iopromide. The hyporheic zone, with its varying redox conditions, mainly due to the upwelling and downwelling of surface and groundwater levels, could potentially provide microorganisms with conditions for the complete transformation of recalcitrant pharmaceuticals. <iframe src="https://publications.waset.org/abstracts/114009.pdf" style="width:100%; height:400px;" frameborder="0"></iframe> <p class="card-text"><strong>Keywords:</strong> <a href="https://publications.waset.org/abstracts/search?q=iopromide" title="iopromide">iopromide</a>, <a href="https://publications.waset.org/abstracts/search?q=hyporheic%20zone" title=" hyporheic zone"> hyporheic zone</a>, <a href="https://publications.waset.org/abstracts/search?q=recalcitrant%20pharmaceutical" title=" recalcitrant pharmaceutical"> recalcitrant pharmaceutical</a>, <a href="https://publications.waset.org/abstracts/search?q=redox%20gradients" title=" redox gradients"> redox gradients</a> </p> <a 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