Abstract Details
(2020) Groundwater Nutrient Geochemical Transformations in Organic-Rich Coastal Sediment
Lamore A, Church A, Barnes C & Dimova N
https://doi.org/10.46427/gold2020.1410
The author has not provided any additional details.
12c: Plenary Hall, Wednesday 24th June 22:18 - 22:21
Alexander Lamore
Alexandra Church
Christopher Barnes View abstracts at 3 conferences in series
Natasha Dimova View abstracts at 4 conferences in series
Alexandra Church
Christopher Barnes View abstracts at 3 conferences in series
Natasha Dimova View abstracts at 4 conferences in series
Listed below are questions that have been submitted by the community that the author will try and cover in their presentation. To submit a question, ensure you are signed in to the website. Authors or session conveners approve questions before they are displayed here.
Submitted by Christopher Sabine on Tuesday 16th June 21:30
Carbon release generally increased as nitrate increased, but it was lower in the 800 uM addition than the 400 uM addition. Why?
Hi Dr. Sabine, If you are referring to carbon released as DIC from the remineralization of organic matter, then I suspect the reason is because of sulfate reduction that occurred in addition to nitrate reduction during this particular incubation. We did not analyze for sulfate in this study, but DIC and ammonium were high in the 400uM incubation and sulfate reduction produces both DIC and ammonium while consuming organic matter. The laboratory that performed nutrient analysis for us also reported that they suspected sulfate to be present in some of the samples from the 400uM incubation. Thank you for the question, I hope this answers it! -Alex Lamore
Carbon release generally increased as nitrate increased, but it was lower in the 800 uM addition than the 400 uM addition. Why?
Hi Dr. Sabine, If you are referring to carbon released as DIC from the remineralization of organic matter, then I suspect the reason is because of sulfate reduction that occurred in addition to nitrate reduction during this particular incubation. We did not analyze for sulfate in this study, but DIC and ammonium were high in the 400uM incubation and sulfate reduction produces both DIC and ammonium while consuming organic matter. The laboratory that performed nutrient analysis for us also reported that they suspected sulfate to be present in some of the samples from the 400uM incubation. Thank you for the question, I hope this answers it! -Alex Lamore
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