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REACTIONS OF AMMONIA WITH SOIL. I
Author(s) -
ASHWORTH J.
Publication year - 1973
Publication title -
journal of soil science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.244
H-Index - 111
eISSN - 1365-2389
pISSN - 0022-4588
DOI - 10.1111/j.1365-2389.1973.tb00745.x
Subject(s) - soil water , adsorption , chemistry , ammonia , inorganic chemistry , ion , environmental chemistry , organic chemistry , soil science , geology
Summary Heats of adsorption and adsorption isotherms of ammonia gas were measured at 300 K (27 °C) on outgassed soil saturated with Na + , K + , NH 4 + , Ca 2+ , or Mg 2+ ions. The Ca and Mg soils adsorbed apparently one more NH 2 molecule per exchangeable ion than the Na and K soils, mostly in the relative pressure range o to 0.005, but not much more than the NH 4 soil. The initial heat of adsorption was c. 75 kJ mol ‐1 on the Ca and Mg soils and c. 60 kJ mol ‐1 on the other soils. The results suggest that most NH, is sorbed on these soils through reactions not involving exchangeable cations.