Nitrogen is discharged from wastewater treatment
Chapter 18, Problem 113P(choose chapter or problem)
Problem 113P
Nitrogen is discharged from wastewater treatment facilities into rivers and streams, usually as NH3 and NH4+:
NH3(aq)+H2O(l)⇌NH4+(aq)+OH? (aq) Kb = 1.76×10?5
One strategy for removing it is to raise the pH and “strip” the NH3 from solution by bubbling air through the water,
(a) At pH 7.00, what fraction of the total nitrogen in solution is NH3, defined as [NH3]/([NH3] + [NH4+])?
(b) What is the fraction at pH 10.00? (c) Explain the basis of ammonia stripping.
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