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s‐Triazine Adsorption Studies: Ca‐H‐Humic Acid
Author(s) -
Gilmour J. T.,
Coleman N. T.
Publication year - 1971
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/sssaj1971.03615995003500020024x
Subject(s) - adsorption , humic acid , saturation (graph theory) , atrazine , chemistry , triazine , nuclear chemistry , inorganic chemistry , environmental chemistry , organic chemistry , pesticide , agronomy , fertilizer , mathematics , combinatorics , biology
Small amounts of Ca‐H‐humic acid suspension in dialysis bags were immersed in dilute CaCl 2 which contained 1.33 × 10 ‐5 M to 6.67 × 10 ‐5 M atratone, atrazine, prometone, or prometryne. Adsorption isotherms were linear. Increases in CaCl 2 concentration from 10 ‐4 M to 10 ‐2 M or larger Ca saturation (10 to 100% Ca) of humic acid resulted in less s ‐triazine adsorption. Greater adsorption occurred when the amount of Ca‐humate at a specified Ca saturation was increased. An ionexchange treatment of adsorption quantitatively predicted adsorption changes with change in s ‐triazine concentration, CaCl 2 concentration, and Ca saturation of the humic acids.