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Land Disposal of Waste Gases III. Sorption Patterns from Buried Gas Injection Pipes
Author(s) -
Miyamoto S.,
Warrick A. W.,
Prather R. J.
Publication year - 1974
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1974.00472425000300020017x
Subject(s) - sorption , front (military) , soil water , outflow , soil gas , homogeneous , chemistry , environmental science , geology , soil science , thermodynamics , adsorption , oceanography , physics , organic chemistry
The advancement of sorption fronts resulting from the injection of reactive gases into soils through buried porous pipes is analyzed mathematically and verified experimentally with small scale laboratory models. The sorption front advances in ellipsoidal patterns with faster rates above the pipes for a homogeneous profile. The reacted portion of soil when the front first intersects the ground surfaces is larger for corrugated surfaces than for plane surfaces. The corrugated surface is chosen with the “highest” elevation point directly over the injection pipe, the “lowest” point midway between. When a shallow sorptive layer overlies a nonreactive material, the shape of the front is not circular but extends towards the midpoint between parallel pipes where the most water would infiltrate. The concentration of reactants in the outflow increases sharply as the front passes a part of the ground surfaces. The sorption fronts determined experimentally by injecting a dry air and nitrogen dioxide mixture into a small soil tank agreed well with the predicted positions based on an instantaneous reaction.