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Groundwater nitrogen attenuation in ...

Sullivan, Marleigh.

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Groundwater nitrogen attenuation in suburban and urban riparian zones.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Groundwater nitrogen attenuation in suburban and urban riparian zones./
作者:	Sullivan, Marleigh.
面頁冊數:	103 p.
附註:	Source: Masters Abstracts International, Volume: 53-01.
Contained By:	Masters Abstracts International53-01(E).
標題:	Water resources management. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=1525643
ISBN:	9781321102482

Groundwater nitrogen attenuation in suburban and urban riparian zones.
Sullivan, Marleigh.

Groundwater nitrogen attenuation in suburban and urban riparian zones. - 103 p.

Source: Masters Abstracts International, Volume: 53-01.

Thesis (M.S.)--University of New Hampshire, 2014.

This item must not be sold to any third party vendors.

Anthropogenic inputs of nitrogen have dramatically increased fluxes to coastal waters leading to eutrophication. Riparian zones are considered particularly effective at and typically host conditions favorable for denitrification. The in-situ push-pull method was used in riparian groundwater from May-November, 2013. A plume of groundwater amended with excess NO3- and Br- was injected to characterize nitrogen attenuation processes and electron donors. Median NO3- removal occurred in all experimental rounds (1.6-9.2 mg N/L*day), but less than half showed TDN removal (0.1-9.0 mg N/L*day). Shifts to net nitrogen production in November (3.0-10.6 mg N/L*day) could indicate seasonal nitrogen export. An inverse relationship was observed between available DOC and TDN removal contradicting results in similar studies. Alternative electron donors such as HS-, S0, Fe 2+, and Mn2+ could play a more important role in denitrification under ambient conditions than previously thought and should be considered in future field studies of nitrogen attenuation.

ISBN: 9781321102482Subjects--Topical Terms:

794747
Water resources management.

Groundwater nitrogen attenuation in suburban and urban riparian zones.
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520 $a Anthropogenic inputs of nitrogen have dramatically increased fluxes to coastal waters leading to eutrophication. Riparian zones are considered particularly effective at and typically host conditions favorable for denitrification. The in-situ push-pull method was used in riparian groundwater from May-November, 2013. A plume of groundwater amended with excess NO3- and Br- was injected to characterize nitrogen attenuation processes and electron donors. Median NO3- removal occurred in all experimental rounds (1.6-9.2 mg N/L*day), but less than half showed TDN removal (0.1-9.0 mg N/L*day). Shifts to net nitrogen production in November (3.0-10.6 mg N/L*day) could indicate seasonal nitrogen export. An inverse relationship was observed between available DOC and TDN removal contradicting results in similar studies. Alternative electron donors such as HS-, S0, Fe 2+, and Mn2+ could play a more important role in denitrification under ambient conditions than previously thought and should be considered in future field studies of nitrogen attenuation.
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