COLLOIDAL ORGANIC ACIDS AS FACTORS IN THE WEATHERING OF ANORTHITE

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Abstract
A study of the weathering of anorthite by organic colloidal acids and other acids gave the following results: In 110 days, H-humate, H-agar, H-bentonite, and H-acetate weathered anorthite effectively. The H-bentonite, H-humate, and H-agar weathered more calcium than the monomolecularly dispersed acetic acid. The dissociation of the hydrogen from the micelle of the colloidal acid was not a factor, since systems with comparatively small amts. of dissociated hydrogen weathered as much Ca from anorthite as others, when the total acidity was the same. The colloidal humus of soils, if unsaturated, may become an effective agent in transferring bases from the crystal of primary minerals to the colloidal portion of the soil.

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