TY - JOUR
T1 - Do lagoons near concentrated animal feeding operations promote nitrous oxide supersaturation?
AU - Makris, Konstantinos C.
AU - Sarkar, Dibyendu
AU - Andra, Syam S.
AU - Bach, Stephan B.H.
AU - Datta, Rupali
PY - 2009/6
Y1 - 2009/6
N2 - Animal wastewater lagoons nearby concentrated animal feeding operations (CAFOs) represent the latest tendency in global animal farming, severely impacting the magnitude of greenhouse gas emissions, including nitrous oxide (N2O). We hypothesized that lagoon wastewater could be supersaturated with N2O as part of incomplete microbial nitrification/denitrification processes, thereby regulating the N2O partitioning in the gaseous phase. The objectives of this study were: (i) to investigate the magnitude of dissolved N2O concentrations in the lagoon; and (ii) to determine the extent to which supersaturation of N2O occurs in wastewater lagoons. Dissolved N2O concentrations in the wastewater samples were high, ranging from 0.4 to 40.5 μg N2O mL-1. Calculated dissolved N2O concentrations from the experimentally measured partition coefficients were much greater than those typically expected in aquatic systems (<∼0.6 μg N2O mL-1). Knowledge of the factors controlling the magnitude of N2O supersaturation could potentially bridge mass balance differences between in situ measurements and global N2O models.
AB - Animal wastewater lagoons nearby concentrated animal feeding operations (CAFOs) represent the latest tendency in global animal farming, severely impacting the magnitude of greenhouse gas emissions, including nitrous oxide (N2O). We hypothesized that lagoon wastewater could be supersaturated with N2O as part of incomplete microbial nitrification/denitrification processes, thereby regulating the N2O partitioning in the gaseous phase. The objectives of this study were: (i) to investigate the magnitude of dissolved N2O concentrations in the lagoon; and (ii) to determine the extent to which supersaturation of N2O occurs in wastewater lagoons. Dissolved N2O concentrations in the wastewater samples were high, ranging from 0.4 to 40.5 μg N2O mL-1. Calculated dissolved N2O concentrations from the experimentally measured partition coefficients were much greater than those typically expected in aquatic systems (<∼0.6 μg N2O mL-1). Knowledge of the factors controlling the magnitude of N2O supersaturation could potentially bridge mass balance differences between in situ measurements and global N2O models.
KW - Animal waste
KW - Climate change
KW - Global warming
KW - Lagoons
KW - Nitrous oxide
KW - Supersaturation
KW - Wastewater
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U2 - 10.1016/j.envpol.2009.01.019
DO - 10.1016/j.envpol.2009.01.019
M3 - Article
C2 - 19246141
AN - SCOPUS:64149098314
SN - 0269-7491
VL - 157
SP - 1957
EP - 1960
JO - Environmental Pollution
JF - Environmental Pollution
IS - 6
ER -