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Acid‐Base Reactions in Gas Transfer: A Mathematical Approach
Author(s) -
Howe Kerry J.,
Lawler Desmond F.
Publication year - 1989
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1989.tb03323.x
Subject(s) - countercurrent exchange , stripping (fiber) , hydrogen sulfide , chemistry , acid gas , carbon dioxide , adsorption , sulfide , waste management , wastewater , volumetric flow rate , acid–base reaction , base (topology) , water treatment , inorganic chemistry , environmental engineering , environmental science , materials science , organic chemistry , sulfur , thermodynamics , engineering , mathematical analysis , physics , mathematics , composite material
Acid‐base reactions occur simultaneously with gas transfer reactions in several common applications in water and wastewater treatment. A simple methodology to account quantitatively for the effects of the acid‐base reactions on the gas transfer rate was developed, checked by comparison with laboratory data, and applied to an actual drinking water problem situation. Equations for application to a variety of gas‐liquid contacting reactors are given. The rate of gas adsorption or stripping was shown to be drastically influenced by pH in applicable cases. Laboratory results for stripping of carbon dioxide in batch reactors and continuous‐flow countercurrent packed towers compared excellently with the theory. The theory was applied to a full‐scale operating system in which hydrogen sulfide is stripped from a groundwater drinking water supply; simultaneous stripping of carbon dioxide and oxidation of the sulfide were accounted for. Reduction of the influent pH was recommended to improve the stripping of the hydrogen sulfide.