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Effect of Dissolution Rate on the Efficiency of Industrial and Mined Gypsum in Improving Infiltration of a Sodic Soil
Author(s) -
Keren R.,
Shainberg I.
Publication year - 1981
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1981.03615995004500010022x
Subject(s) - gypsum , dissolution , infiltration (hvac) , distilled water , environmental science , sodic soil , chemistry , materials science , metallurgy , composite material , chromatography
The dissolution rate of gypsum from three sources (analytical, mined, and industrial—a by‐product of the phosphate fertilizer industry) in solutions containing various initial NaCl concentrations was studied at 25°C. The total Ca concentration in 0.05 and 0.1 N NaCl solutions at a given time was about 1.3 and 1.5 times that in distilled water, respectively. The dissolution rate of the industrial gypsum was much higher than that of the mined gypsum, whereas the dissolution coefficients of the analytical, industrial, and mined gypsum were the same for a given surface area. The probable reasons for these findings are discussed. The efficiency of the industrial and mined gypsum in maintaining a high infiltration rate in a sodic soil under simulated rain conditions was studied. The efficiency of the industrial gypsum was found to be much higher than that of the mined. The high efficiency of industrial gypsum in maintaining a high infiltration rate is attributed to its high rate of dissolution.