Question

What is denitrification. write the reaction?​

Answer 1

Answer:

Denitrification is defined as the “microbial reduction of nitrate or nitrite coupled to electron transport phosphorylation resulting in gaseous N either as molecular N2 or as an oxide of N.” The key to denitrification as defined is the availability of the N oxides, nitrite (NO2−) or nitrate (NO3−), which are formed ...

Answer 2

Answer:

DEFINE:

Denitrification is a microbially facilitated process where nitrate (NO3−) is reduced and ultimately produces molecular nitrogen (N2) through a series of intermediate gaseous nitrogen oxide products. ... Denitrifying microbes require a very low oxygen concentration of less than 10%, as well as organic C for energy.

REACTION:

Denitrification generally proceeds through some combination of the following half reactions, with the enzyme catalyzing the reaction in parentheses:

NO3− + 2 H+ + 2 e−→ NO

2− + H2O (Nitrate reductase)

NO

2− + 2 H+ + e− → NO + H2O (Nitrite reductase)

2 NO + 2 H+ + 2 e− → N

2O + H2O (Nitric oxide reductase)

N

2O + 2 H+ + 2 e− → N

2 + H2O (Nitrous oxide reductase)

The complete process can be expressed as a net balanced redox reaction, where nitrate (NO3−) gets fully reduced to dinitrogen (N2):

2 NO3− + 10 e− + 12 H+ → N2 + 6 H2O

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