Kinetics of arsenite sorption in soils

Journal Article · · Soil Sci. Soc. Am. J.; (United States)

OSTI ID:6446276

Elkhatib, E A; Bennett, O L; Wright, R J

The sorption of As(III) by 10 surface and subsurface horizons was investigated. An Elovich type equation and a modified Freundlich equation were used to describe the kinetics of the As(III) sorption process. Both equations successfully describe As(III) sorption rates. However, the modified Freundlich equation proved to be superior when both coefficients of determination (R/sup 2/) and standard errors of estimate (SE) were considered. The SE values from the modified Freundlich equation were consistently lower than those from the Elovich equation. Modified Freundlich equation parameters were regressed against soil chemical and physical properties to indicate possible sorption mechanisms and to identify soil properties that could serve as predictors of arsenite sorption. The regression equations indicated that iron oxides and Eh were the main soil properties controlling arsenite sorption rate.

• Research Organization: USDA-ARS, Beckley, WV
• OSTI ID: 6446276
• Journal Information: Soil Sci. Soc. Am. J.; (United States), Journal Name: Soil Sci. Soc. Am. J.; (United States) Vol. 48:4; ISSN SSSJD
• Country of Publication: United States
• Language: English

Related Subjects

510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ARSENIC COMPOUNDS
ARSENIC OXIDES
CHALCOGENIDES
CHEMICAL PROPERTIES
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
CHEMISTRY
EQUATIONS
KINETICS
MATHEMATICS
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
REACTION KINETICS
REGRESSION ANALYSIS
SEPARATION PROCESSES
SOIL CHEMISTRY
SOILS
SORPTION
STATISTICS