1 / 9

Nitrogen In Groundwater from Ground-Water Microbiology and Geochemistry

Nitrogen In Groundwater from Ground-Water Microbiology and Geochemistry. By: Francis H. Chapelle. Images are from Google searches and for visual effect only. The Nitrogen Cycle. Atmospheric Nitrogen (N 2 ) Microbially mediated nitrogen fixation, reduction, and oxidation

sfritts
Télécharger la présentation

Nitrogen In Groundwater from Ground-Water Microbiology and Geochemistry

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Nitrogen In GroundwaterfromGround-Water Microbiology and Geochemistry By: Francis H. Chapelle Images are from Google searches and for visual effect only

  2. The Nitrogen Cycle • Atmospheric Nitrogen (N2) • Microbially mediated nitrogen fixation, reduction, and oxidation • N2+6H+16ATP -->2NH3+16ADP+16P • N2 -->NH3 -->NO2- -->NO3- -->NH2 • Denitrification: NO3-->NO2-->N2O-->N2

  3. Nitrogen Cycling in Ground-Water Systems • Energy availability limits nitrogen fixation • Nitrification occurs under aerobic conditions • Denitrification occurs under anaerobic conditions • Nitrate in Groundwater: • Blue baby syndrome • Gastric cancer rates • Nitrate Sources to Ground-water: • Animal excrement and manure • Sewage effluents • Nitrogen fertilizers • Municipal wastes • Naturally occurring nitrate sources

  4. Animal Excrement and Manure

  5. Sewage Effluents

  6. Nitrogen Fertilizers

  7. Municipal Wastes

  8. Naturally occurring nitrate sources • 15N and 14N isotopes •  15N ratios

  9. Why is it important to understand the nitrogen cycle when analyzing groundwater composition? What are some of the limiting factors of the nitrogen cycle within groundwater systems?

More Related