i
Wastewater Injection, Aquifer Biogeochemical Reactions, And Resultant Groundwater N Fluxes To Coastal Waters: Kā'Anapali, Maui, Hawai'I
-
2016
-
-
Source: Marine Pollution Bulletin 110(1): 281-292
Details:
-
Journal Title:Marine Pollution Bulletin
-
Personal Author:
-
NOAA Program & Office:
-
Sea Grant Program:
-
Description:We utilize N and C species concentration data along with δ15N values of NO3− and δ13C values of dissolved inorganic C to evaluate the stoichiometry of biogeochemical reactions (mineralization, nitrification, anammox, and denitrification) occurring within a subsurface wastewater plume that originates as treated wastewater injection and enters the coastal waters of Maui as submarine groundwater discharge. Additionally, we compare wastewater effluent time-series data, injection rates, and treatment history with submarine spring discharge time-series data. We find that heterotrophic denitrification is the primary mechanism of N loss within the groundwater plume and that chlorination for pathogen disinfection suppresses microbial activity in the aquifer responsible for N loss, resulting in increased coastal ocean N loading. Replacement of chlorination with UV disinfection may restore biogeochemical reactions responsible for N loss within the aquifer and return N-attenuating conditions in the effluent plume, reducing N loading to coastal waters.
-
Keywords:
-
Source:Marine Pollution Bulletin 110(1): 281-292
-
DOI:
-
Pubmed ID:27339740
-
Document Type:
-
Funding:
-
Rights Information:Accepted Manuscript
-
Compliance:Library
-
Main Document Checksum:
-
Download URL:
-
File Type: