Computer Science – Sound
Scientific paper
Feb 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57..555b&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 57, Issue 3, pp.555-569
Computer Science
Sound
17
Scientific paper
Porewater uranium profiles from Long Island Sound (LIS) and Amazon shelf sediments and LIS sediment incubation experiments indicate that both removal and release processes control U geochemistry in estuarine sediments. Release of U from sediments occurs in association with Fe reduction. A correlation between U and Fe (and Mn) observed in sediment incubation experiments suggests that there is release of U from Fe-Mn-oxides as they are reduced, consistent with data from the Amazon shelf. In both sediment porewater profiles (LIS and Amazon) and sediment incubation experiments (LIS), there is removal of U from porewater under conditions of sulfate reduction. Sediment incubation experiments indicate that the removal rate is first-order with respect to U concentration, and the rate constant is linearly correlated to sulfate reduction rates. The link between U removal and sulfate reduction (a measure of diagenetic microbial activity) is consistent with a microbial mediation of U reduction. The diffusional flux of U into LIS sediments is estimated from porewater profiles. The inclusion of this estuarine removal term in the oceanic U balance increases the importance of the sediment sink.
Barnes Christina E.
Cochran Kirk J.
No associations
LandOfFree
Uranium geochemistry in estuarine sediments: Controls on removal and release processes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Uranium geochemistry in estuarine sediments: Controls on removal and release processes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Uranium geochemistry in estuarine sediments: Controls on removal and release processes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1273958