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Organic Carbon and Denitrification <br />NH3 <br />N2 <br />NIO NO <br />02 <br />CO2 <br />Gas <br />HNO2 <br />A <br />> HNO3 <br />A <br />AOB <br />(Denitrification) <br />DEN <br />I <br />_ CO2 <br />Y <br />DEN �, <br />�,,..._AOB `. <br />L <br />r `✓ AOB _. �. �I <br />I' pEiV DEN, AER <br />`' AOB �r A DEW', rw> <br />02---- (Aerobic respiration) <br />Liquid <br />T q <br />NH4`� <br />N2__ N20 NO <br />NO3' AOB. Noe <br />CH2O <br />_ <br />�.,._�NO�.� _T <br />AOB ---- NOB (Nitrificalion) <br />A <br />----------------------—----------------------- <br />-[ > Equilibrium reactions <br />> Kinetic reactions <br />Mineral <br />NH4' <br />CH2O <br />� <br />I <br />i Organic Carbon <br />Gibbs Free <br />electron donor) <br />f <br />Energy <br />Solution Eh 1 1 <br />/� Groundwater <br />(kJ/elmtron) <br />(mv) <br />t� �7r9 <br />L <br />�YII <br />. HzO...... ............................. <br />Aerobic oxidation •78.5 <br />+334 <br />� <br />td0., <br />2 .......................................... <br />Denitrification -72.3 <br />+231 <br />Mn(11J) as Mn02 <br />Mn(II) as MnCO3 ..... <br />Manganese reduction -50.3 <br />+62 <br />Fe(I11) as Fe00F1 <br />Fe(II) as FeCO3 <br />............. Iran reduction 4.6 <br />-468 <br />LS042 <br />HS' ...................Sulphate <br />reduction 21.4 <br />-699 <br />CHd <br />CO2 <br />