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THE ADSORPTION OF UREA AND SOME OF ITS DERIVATIVES BY A VARIETY OF SOILS
Author(s) -
HANCE R. J.
Publication year - 1965
Publication title -
weed research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.693
H-Index - 74
eISSN - 1365-3180
pISSN - 0043-1737
DOI - 10.1111/j.1365-3180.1965.tb00332.x
Subject(s) - adsorption , chemistry , urea , alkyl , soil water , aryl , solubility , langmuir , substituent , absorption (acoustics) , langmuir adsorption model , organic chemistry , nuclear chemistry , medicinal chemistry , environmental science , soil science , physics , acoustics
Summary. The absorption of urea and a number of its derivatives by different soils was investigated using a slurry‐type procedure. The materials could be listed in the following order of increasing tendancy to be adsorbed: urea, fenuron, methylurea, phenylurea, monuron, monolinuron, diuron. linuron, neburon and chloroxuron. Both N ‐aryl and N ‐alkyl substituents appeared to play a part in adsorption. Increasing chain length in the alkyl substituents and chloro‐ and chlorophenoxy substitution in the aryl substituent increased adsorption. There was no relationship between adsorption and water solubility. Organic matter content was the only soil property that could be related to adsorptive capacity. The evidence of Langmuir isothermal equilibrium plots suggests that only a fraction of the total soil surface is available for the adsorption of substituted ureas. L'adsorption Je l'uré de ses dérivés sur dfférents sols