Effect of pH on adsorption of arsenic and selenium from landfill leachate by clay minerals

Journal Article · Sat Jan 01 04:00:00 EST 1977 · Soil Sci. Soc. Am. J.; (United States)

DOI:https://doi.org/10.2136/sssaj1977.03615995004100010019x· OSTI ID:7277277

Frost, R R; Griffin, R A

Adsorption of As(V), As(III), and Se(IV) anions from municipal landfill leachate solutions by the clay minerals kaolinite and montmorillonite is strongly dependent upon solution pH. The H/sub 2/AsO/sub 4//sup -/ and HSeO/sub 3//sup -/ ions are the apparent primary As(V) and Se(IV) species being adsorbed by the clay minerals. Activation of the anion adsorption sites on the clay minerals by H/sup +/ ions is important in determining the amount of HSeO/sub 3//sup -/ ions adsorbed by the clay minerals, but it is apparently not important in determining the amount of H/sub 2/AsO/sub 4//sup -/ ions adsorbed. Montmorillonite adsorbed more As(V), As(III), and Se(IV) anions than kaolinite. Although no definite proof is given, the higher adsorption by montmorillonite is attributed to a higher edge surface area. The results of the study suggest that disposal of As and Se wastes in municipal landfills, especially under alkaline conditions, could produce ground water contamination by As and Se.

• Research Organization: Illinois State Geological Survey, Urbana
• OSTI ID: 7277277
• Journal Information: Soil Sci. Soc. Am. J.; (United States), Journal Name: Soil Sci. Soc. Am. J.; (United States) Vol. 41:1; ISSN SSSJD
• Country of Publication: United States
• Language: English

Related Subjects

510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ADSORPTION
ALUMINIUM COMPOUNDS
ALUMINIUM SILICATES
ANIONS
ARSENIC
ARSENIC COMPOUNDS
CHARGED PARTICLES
CLAYS
DISSOLUTION
ELEMENTS
ENVIRONMENTAL EFFECTS
GROUND WATER
HYDROGEN COMPOUNDS
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
IONS
KAOLINITE
LAND POLLUTION
LEACHING
MANAGEMENT
MINERALS
MONTMORILLONITE
OXYGEN COMPOUNDS
PH VALUE
POLLUTION
SANITARY LANDFILLS
SELENIUM
SELENIUM COMPOUNDS
SEMIMETALS
SEPARATION PROCESSES
SILICATES
SILICON COMPOUNDS
SOILS
SORPTION
WASTE DISPOSAL
WASTE MANAGEMENT
WATER
WATER POLLUTION