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SCAN0003 - SUMMARY OF ELECTRON ACCEPTORS AND ELECTRON...

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Unformatted text preview: SUMMARY OF ELECTRON ACCEPTORS AND ELECTRON DONORS USED IN RESPIRATION 'I. ELECTRON DONORS [Reduced C, 0, N33; S and metals] NAME - I. Phototrophs 2. Nitrifiers 3. Iron-oxidizing 5. Methanotrophs ELEMENT REDOX REACTION Oxygen Nitrogen Iron Carbon O(—2) ———~>0(0) N(-3)’*:fiN<+5_),,«, Fe(+2) —-—) Fe(+3) S(-2) —-———-—> 8(0) C(—4)—————-> C(+4) ACTUAL REACTION HzO—~—>- 02 + 29.“ _y NH3—~> N03— + 86’ n. ELECTRON ACCEPTORS [Oxidized c, o, N,_‘}E_",:S and metals] ME 1. Aerobic 2. Dcnitdficrs 3. Iron—reducing 4. Sulfatea‘rcducing 5. Methanogcnk ELEMENT REDOX REACTION Oxygen N itrogcn Iron ‘ S ulfut Carbon 0(0) 4'35; 0(—2) N(+5)i—8-9:—>N(-3) Fc(+3)il—€—>Fe(+2) s<+6)i—8£:—>S(-2) C(+4)13£+C(-4) Q) ACTUAL REACTION 02 ~————-> H20 N03‘ ——9 N H3 Fe(OH)3 ’—‘->Fez+ 8042' -——-—) 32‘ C02 -—-9 C H4 192 ...
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