Adsorption of dissolved organic matter from water and synthetic organic contaminants by activated carbons was studied. Four granular activated carbons (GAC) with particle size of 80∼100 mesh and an activated carbon fiber were used. Two coconut shell-based GAC, OLC and CR3140C and a phenol formaldehyde-based activated carbon fiber (ACF10) served as microporous sorbents. Two coal-based GAC, F400 and HD4000 were heat- and steam-treated, respectively, to produce carbons with some mesoporosity. They were denoted as HD4000ST and F400He. The sorbents represented a set of activated carbons with gradually increasing pore size distribution, starting from the most microporous in the order of ACF10 < OLC < CR3140C < F400He < HD4000ST. All the carbons showed a basic surface, with pHPZC values ranging from 8.6 to 10.9. Single solute aqueous isotherms for trichloroethylene (TCE) confirmed that at low residual TCE concentrations, uptakes of all carbons were comparable, but at higher concentrations the carbons with more pore volume in pores < 10Å showed higher uptakes. Only small changes in adsorption capacities under preloading conditions were observed for ACF10, OLC, and CR3140C in comparison to their single solute TCE isotherms. F400He and HD4000ST showed significant preloading effects. This is an abstract of a paper presented at the 231st ACS National Meeting (Atlanta, GA 3/26-30/2006).
|Original language||English (US)|
|Number of pages||5|
|Journal||ACS, Division of Environmental Chemistry - Preprints of Extended Abstracts|
|State||Published - May 22 2006|
|Event||231st ACS National Meeting, 2006 - Atlanta, GA, United States|
Duration: Mar 26 2006 → Mar 30 2006
ASJC Scopus subject areas