Presentation Type

Poster

Title of Abstract

Evaluation of the removal of aqueous halides by Octolig®

Abstract

Evaluation of the removal of aqueous halides by Octolig®. C.H. McCANE and D.F. MARTIN. Institute for Environmental Studies, Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, FL 33620. There are good and cogent reasons for the removal of halide ions from natural water systems. This study was concerned with evaluating the ease or possibility of removing fluoride, chloride, and bromide ions from water by column chromatography with Octolig®, a commercially available, polyethyleneimine covalently attached to a high-surface-area silica gel (CAS Registry No. 404899-06-5). Previous research suggested a mechanism, for removal of certain anions [ J. Environ. Sci. Hlth., 44A: 1545-1550] and subsequent research indicated the efficacy for removal of fluoride ion [J. Environ. Sci. Hlth. 45A:1144-1149] and still other research [unpublished results] indicated that bromide was not removed under similar conditions. Plotting percent removal as a function of charge/ion volume ratio suggested that perhaps 20% removal might be anticipated for chloride ion. However, as seen by completed unpublished research, nearer 10% of Cl- ions were removed. These results suggest a relationship between ionic charge distribution and percent removal. Research has been started with the removal of halide ions from locally collected well water.

Categories

Natural Sciences

Research Type

Research Assistant

Mentor Information

Dr. Dean F Martin

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Evaluation of the removal of aqueous halides by Octolig®

Evaluation of the removal of aqueous halides by Octolig®. C.H. McCANE and D.F. MARTIN. Institute for Environmental Studies, Department of Chemistry, University of South Florida, 4202 East Fowler Avenue, Tampa, FL 33620. There are good and cogent reasons for the removal of halide ions from natural water systems. This study was concerned with evaluating the ease or possibility of removing fluoride, chloride, and bromide ions from water by column chromatography with Octolig®, a commercially available, polyethyleneimine covalently attached to a high-surface-area silica gel (CAS Registry No. 404899-06-5). Previous research suggested a mechanism, for removal of certain anions [ J. Environ. Sci. Hlth., 44A: 1545-1550] and subsequent research indicated the efficacy for removal of fluoride ion [J. Environ. Sci. Hlth. 45A:1144-1149] and still other research [unpublished results] indicated that bromide was not removed under similar conditions. Plotting percent removal as a function of charge/ion volume ratio suggested that perhaps 20% removal might be anticipated for chloride ion. However, as seen by completed unpublished research, nearer 10% of Cl- ions were removed. These results suggest a relationship between ionic charge distribution and percent removal. Research has been started with the removal of halide ions from locally collected well water.