Study of benzene and toluene adsorption on granular activated carbon
Thesis/Dissertation
·
OSTI ID:5993847
Benzene and toluene are among the organic compounds designated by EPA as priority pollutants because of their toxicity to man and the environment. Activated carbon has been used to remove organic compounds from waters for many years. However, little or no information is available in the literature on the removal of specific organic compounds by activated carbon. Therefore, this study was undertaken to investigate the adsorption of benzene and toluene from aqueous solutions onto granular activated carbon. Calgon Filtrasorb 400 carbon was used as the adsorbent. The samples were analyzed on a Perkin-Elmer Sigma 3B gas chromatograph with flame ionization equipped with an HS-6 Head Space Sampler. The data fit the Freundlich isotherm model well with a high correlation coefficient. The pH of the test solutions at 3, 6.5, and 9 shows no effect on benzene adsorption and slight effect on toluene adsorption. The study shows that the amount of benzene or toluene adsorbed increases with increasing initial concentrations. Competitive adsorption of benzene and toluene when present in aqueous mixtures together and with chloroform, acetone, and tert-butanol, shows a significant reduction in benzene adsorption and a little effect on toluene adsorption. Also this study shows that ozone oxidizes benzene and toluene more effectively at pH 3 and 6.5 than at pH 9. The benzene adsorption is reduced somewhat in the presence of ozone byproducts of benzene. However, the toluene adsorption is enhanced in the presence of toluene ozonation byproducts.
- OSTI ID:
- 5993847
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
552000* -- Public Health
560300 -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
99 GENERAL AND MISCELLANEOUS
ACTIVATED CARBON
ADSORBENTS
ADSORPTION
AQUEOUS SOLUTIONS
AROMATICS
BENZENE
CARBON
DISPERSIONS
ELEMENTS
HYDROCARBONS
MIXTURES
NONMETALS
OCCUPATIONAL SAFETY
ORGANIC COMPOUNDS
PH VALUE
PUBLIC HEALTH
SAFETY
SOLUTIONS
SORPTION
TOLUENE
400201 -- Chemical & Physicochemical Properties
552000* -- Public Health
560300 -- Chemicals Metabolism & Toxicology
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
99 GENERAL AND MISCELLANEOUS
ACTIVATED CARBON
ADSORBENTS
ADSORPTION
AQUEOUS SOLUTIONS
AROMATICS
BENZENE
CARBON
DISPERSIONS
ELEMENTS
HYDROCARBONS
MIXTURES
NONMETALS
OCCUPATIONAL SAFETY
ORGANIC COMPOUNDS
PH VALUE
PUBLIC HEALTH
SAFETY
SOLUTIONS
SORPTION
TOLUENE