||Reactions of Chlorite with Activated Carbon and with Vanillic Acid and Indan Adsorbed on Activated Carbon.
Voudrias, E. A. ;
Dielmann, L. M. J. ;
Snoeyink, V. L. ;
Larson, R. A. ;
McCreary, J. J. ;
||Illinois Univ. at Urbana-Champaign. ;Florida Univ., Gainesville. Dept. of Environmental Engineering Sciences.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Activated carbon treatment ;
Water treatment ;
Gas chromatography ;
Mass spectroscopy ;
Reaction kinetics ;
Chemical reactions ;
Granular activated carbon treatment ;
Benzoic acid/hydroxy-(methoxy-ester) ;
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The reaction between chlorite (CO2(-1)) and vanillic acid, at pH 6.0 in the presence of granular activated carbon (GAC), yielded several reaction products identifiable by GC/MS; no products were found in the absence of GAC. Indan and ClO2 or ClO2(-1) reacted in aqueous solution and gave similar products in the presence and absence of GAC. Carbon exposed to ClO2(-1) appears to become capable of promoting hydroxylation, decarboxylation, ring cleavage and CO2 addition reactions with vanillic acid. Chlorite in aqueous solution was reduced by GAC predominantly to Cl(-1). The capacity of one type of virgin GAC for ClO2(-1) reduction to Cl(-1) was about 80-90 mg ClO2(-1)/g GAC before the rate of reaction was sharply reduced.