L1 /
7
CH3041
BACTERIAL REACTIONS
• Aerobic
Respiration pEow 22
DGo -475 (kJ/mol)
{CH2O} + O2(g) ® CO2(g) + H2O
{CH2O} + O2(g) ® CO2(g) + H2O
• Denitrification pEow 21 DGo -448 (kJ/mol)
5{CH2O} + 4NO3- ® 2N2(g) + 4HCO3- + CO2(g) + 3H2O
5{CH2O} + 4NO3- ® 2N2(g) + 4HCO3- + CO2(g) + 3H2O
• Manganese reduction pEow 18 DGo -349 (kJ/mol)
{CH2O} +3CO2(g) + H2O + 2MnO2(s) ® 2Mn2+ + 4HCO3-
{CH2O} +3CO2(g) + H2O + 2MnO2(s) ® 2Mn2+ + 4HCO3-
• Iron
reduction pEow 9.2 DGo -114 (kJ/mol)
{CH2O} +7CO2 + 4Fe(OH)3(s) ® 4Fe2+ + 8HCO3- +3H2O
{CH2O} +7CO2 + 4Fe(OH)3(s) ® 4Fe2+ + 8HCO3- +3H2O
• Sulphate reduction pEow 4.5 DGo -77 (kJ/mol)
2{CH2O} + SO42- ® H2S(g) + 2HCO3-
2{CH2O} + SO42- ® H2S(g) + 2HCO3-
• Methanogenesis pEow 4.1 DGo -58 (kJ/mol)
2{CH2O} ® CH4(g) + CO2(g)
2{CH2O} ® CH4(g) + CO2(g)
[ pEow = pEo at pH = 7.0 in water, not [H+]
= 1.0M ]
