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Effects of Background Dissolved Organic Matter on TCE Adsorption by GAC
Author(s) -
Carter Margaret C.,
Weber Walter J.,
Olmstead Kevin P.
Publication year - 1992
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.1992.tb07415.x
Subject(s) - microporous material , adsorption , trichloroethylene , organic matter , chemistry , dissolved organic carbon , context (archaeology) , particle size , particle (ecology) , activated carbon , total organic carbon , carbon fibers , chemical engineering , chromatography , environmental chemistry , materials science , organic chemistry , geology , composite material , paleontology , oceanography , engineering , composite number
The effects of dissolved organic matter, reactor configuration, and granular activated carbon (GAC) particle size on equilibrium adsorption of trichloroethylene (TCE) were examined under simultaneous loading and early preloading conditions. Differences in isotherm capacities obtained using batch‐reactor and column‐reactor estimation methods were observed when natural background organic matter and TCE were adsorbed simultaneously onto nonpreloaded GAC. Differences in isotherms derived from the two methods were diminished, however, when the carbon was first preloaded with the background organic matter in a river water in the absence of TCE. Significant increases in isotherm slope were observed with increasing preloading time for GAC of two different particle sizes. Isotherms determined using powdered activated carbon sieved from crushed preloaded GAC had essentially parallel slopes, however, with capacities greater than the parent preloaded GAC over the concentration range of interest. The observed effects were analyzed in the context of a proposed dualistic model for interpretation of interactions among background organic matter, target solutes, and microporous adsorbents.