||Competitive Adsorption of VOCs and BOM: Oxic and Anoxic Environments.
Sorial, G. A. ;
Papadimas, S. P. ;
Suidan, M. T. ;
Speth, T. F. ;
||Cincinnati Univ., OH. Dept. of Civil and Environmental Engineering.;Environmental Protection Agency, Cincinnati, OH. Risk Reduction Engineering Lab.
Water purification ;
Activated carbon treatment ;
Organic matter ;
Organic compounds ;
Chemical removal(Water treatment) ;
Drinking water ;
IAST(Ideal Adsorbed Solution Theory) ;
Ideal Adsorbed Solution Theory ;
BOM(Background organic matter) ;
Background organic matter ;
VOCs(Volatile organic compounds) ;
Fictive components ;
Oxic condition ;
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The effect of the presence of molecular oxygen on the adsorption of volatile organic compounds (VOCs) in distilled Milli-Q water and in water supplemented with background organic matter (BOM) is evaluated. Experiments are conducted under conditions where molecular oxygen is present in the test environment (oxic adsorption), and where oxygen is absent from the test environment (anoxic adsorption). Adsorption isotherms for tetrachloroethylene (PCE) and trichloroethylene (TCE) in Milli-Q water showed no impact of the presence of oxygen on their adsorption behavior, while adsorption isotherms for cis-1,2-dichloroethylene (DCE) showed higher capacities under oxic conditions. The Ideal Adsorbed Solution Theory (IAST) successfully predicted the VOCs anoxic adsorption isotherms in BOM. However, the IAST model did not predict the VOCs oxic adsorption isotherms in BOM.