TCE Adsorption by GAC Preloaded With Humic Substances

Document Type

Article

Publication Date

5-1998

Publication Title

Journal of the American Water Works Association

Volume

90

Issue

5

Publisher

American Water Works Association

Abstract

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. TCE isotherms were measured on preloaded carbon in completely mixed batch reactors (CMBRs) and compared with TCE adsorption on nonpreloaded carbon. TCE isotherms were modeled using the two-parameter Freundlich and the three-parameter Langmuir-Freundlich isotherms. The effects of preloading and of molecular weight were evaluated in terms of changes in the TCE isotherms and computed site-energy distributions.

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