Adsorption of benzene from aqueous solutions by bentonite treated with quaternary amines

Journal Article · Thu Nov 01 04:00:00 EST 1990 · Environmental Progress; (United States)

DOI:https://doi.org/10.1002/ep.670090419· OSTI ID:5606268

Cadena, F; Garcia, R ^[1]; Peters, R W ^[2]

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1. New Mexico State Univ., Las Cruces (USA)
2. Argonne National Lab., IL (USA)

The adsorptive properties of Wyoming bentonite, which has been tailored using various tetraalkylammonium (TAA{sup +}) ions, have been investigated for the selective removal of hazardous organic pollutants found in waters and soils contaminated by petrochemical spills. The effectiveness of the tailoring agents is evaluated by comparing the adsorption isotherms of benzene on both treated and untreated soils. Five TAA{sup +}-type compounds are investigated: ammonium (NH{sub 4}{sup +}), tetramethylammonium (TMA{sup +}), tetraethylammonium (TEA{sup +}), tetrapropylammonium (TPA{sup +}), and tetrabutylammonium (TBA{sup +}). The optimum dose characteristics are determined for each tailoring cation. The adsorption capacity of the treated clay decreases for doses that exceed the optimum dose because of the increase in organic content in solution, which induces a reduction in the partition coefficient between organically coated solid and the liquid phase. Despite the similarity in nature of the TAA{sup +} cations used in this study, significant differences in the adsorption capacities are obtained for the various compounds.

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5606268
• Journal Information: Environmental Progress; (United States), Journal Name: Environmental Progress; (United States) Vol. 9:4; ISSN ENVPD; ISSN 0278-4491
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540220 -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540320* -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
ADSORPTION
ADSORPTION ISOTHERMS
AMINES
AMMONIUM COMPOUNDS
AQUEOUS SOLUTIONS
AROMATICS
BENTONITE
BENZENE
CHEMICAL REACTION KINETICS
CHEMICAL SPILLS
CLAYS
CLEANING
DECONTAMINATION
DISPERSIONS
HYDROCARBONS
HYDROGEN COMPOUNDS
ISOTHERMS
KINETICS
MIXTURES
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
REACTION KINETICS
SOILS
SOLUTIONS
SORPTION
WATER