Irreversible adsorption of phenolic compounds by activated carbons

Technical Report · Thu Dec 01 04:00:00 EST 1988

DOI:https://doi.org/10.2172/6416993· OSTI ID:6416993

Grant, T M; King, C J

Studies were undertaken to determine the reasons why phenolic sorbates can be difficult to remove and recover from activated carbons. The chemical properties of the sorbate and the adsorbent surface, and the influences of changes in the adsorption and desorption conditions were investigated. Comparison of isotherms established after different contact times or at different temperatures indicated that phenolic compounds react on carbon surfaces. The reaction rate is a strong function of temperature. Regeneration of carbons by leaching with acetone recovered at least as much phenol as did regeneration with other solvents or with displacers. The physiochemical properties of adsorbents influences irreversible uptakes. Sorbates differed markedly in their tendencies to undergo irreversible adsorption. 64 refs., 47 figs., 32 tabs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6416993
• Report Number(s): LBL-26577; ON: DE89008386
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACTIVATED CARBON
ADSORBENTS
ADSORPTION
AMINES
ANILINE
AQUEOUS SOLUTIONS
AROMATICS
BENZENE
CARBON
CHEMICAL PROPERTIES
DESORPTION
DISPERSIONS
ELEMENTS
HYDROCARBONS
HYDROXY COMPOUNDS
ISOTHERMS
KINETICS
MIXTURES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
PH VALUE
PHENOLS
QUINONES
REACTION KINETICS
REGENERATION
SOLUTIONS
SORPTION
SURFACE AREA
SURFACE PROPERTIES
TEMPERATURE EFFECTS