TCE adsorption by GAC preloaded with humic substances
- Rensselaer Polytechnic Inst., Troy, NY (United States). Dept. of Environmental and Energy Engineering
- Clemson Univ., Anderson, SC (United States). Environmental Systems Engineering Dept.
- Univ. of Michigan, Ann Arbor, MI (United States). Dept. of Civil and Environmental Engineering
Adsorption of trichloroethylene (TCE) by activated carbon preloaded with humic and fulvic acids was studied under several conditions in completely mixed batch systems. The authors investigated how molecular weight and molecular-weight distribution of preloaded humic substances affected subsequent adsorption of TCE. The capacity of carbon to adsorb TCE was most greatly reduced in carbon that was preloaded with humic acid components having molecular weights less than about 1,400 g/mol as polystyrene sulfonate. The adsorption capacity was greatly reduced in carbon that was preloaded with whole humic mixtures in which lower molecular weights predominated. The energy distributions of adsorbent indicate that preloaded compounds preferentially occupy high-energy sites, making them inaccessible to subsequently encountered TCE.
- Sponsoring Organization:
- National Science Foundation, Washington, DC (United States); National Insts. of Health, Bethesda, MD (United States)
- OSTI ID:
- 599608
- Journal Information:
- Journal of the American Water Works Association, Vol. 90, Issue 5; Other Information: PBD: May 1998
- Country of Publication:
- United States
- Language:
- English
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