« Previous AbstractOviposition Experience of Parasitoid Wasps with Nonhost Larvae Affects their Olfactory and Contact-Behavioral Responses toward Host- and Nonhost-Infested Plants    Next AbstractOpen-field responses of rats to odors from stressed and nonstressed predecessors »

J Environ Pathol Toxicol Oncol

Title:		Removal of higher molecular weight organic compounds by the granular activated carbon adsorption unit process
Author(s):		Stevens AA; Seeger DR; DeMarco J; Moore L;
Address:
Journal Title:		J Environ Pathol Toxicol Oncol
Year:		1987
Volume:		7
Issue:		7-Aug
Page Number:		363 - 372
DOI:
ISSN/ISBN:		0731-8898 (Print) 0731-8898 (Linking)
Abstract:		"The granular activated carbon adsorption unit process in drinking water treatment typically removes purgeable organic compounds for time periods on the order of a few weeks. Experimental evidence indicates that less volatile compounds of generally higher molecular weight than the purgeable fraction, but still detectable by gas chromatography, are efficiently removed for longer periods. Field data substantiate this. Explanatory mechanisms may include stronger adsorption affinities or biodegradation. Non-gas chromatographable, higher molecular weight materials such as humic acids, as measured by Total Organic Carbon (TOC) or trihalomethane formation potential, revert to lower removal efficiencies. Biodegradation may be responsible for a continued long term removal of a fraction of these materials"
Keywords:		"Adsorption *Carbon Chromatography, Gas *Hydrocarbons Louisiana Michigan Molecular Weight Water Pollutants Water Supply/*standards;"
Notes:		"MedlineStevens, A A Seeger, D R DeMarco, J Moore, L eng 1987/09/01 J Environ Pathol Toxicol Oncol. 1987 Sep-Dec; 7(7-8):363-72"