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Selenite Adsorption on Alluvial Soils: I. Soil Composition and pH Effects
Author(s) -
Neal Rosemary H.,
Sposito Garrison,
Holtzclaw K. M.,
Traina S. J.
Publication year - 1987
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/sssaj1987.03615995005100050012x
Subject(s) - san joaquin , soil water , adsorption , selenium , chemistry , alluvium , environmental chemistry , composition (language) , soil ph , mineralogy , soil science , geology , linguistics , philosophy , organic chemistry , geomorphology
The adsorption of selenite by five alluvial soils from the San Joaquin Valley, California, was investigated with respect to the effects of soil composition and pH. Soil samples were prepared in the form of Na‐saturated pastes. Adsorption experiments were carried out in a 50 mol NaCl m −3 background at initial selenite concentrations comparable with those found in natural soil systems. The samples were equilibrated under N 2 ‐stirring in a constant‐temperature apparatus with pH and redox conditions monitored. Selenite adsorption by the soils decreased uniformly with increasing pH in the range 4 to 9 and was independent of soil series above pH 6.