Effectiveness of removal of aqueous perchlorate by Cuprilig, a copper(II) derivative of Octolig.
The present study describes the effectiveness of removal of perchlorate ion by Octolig a commercially available immobilized ligand, IMLIG, and by Cuprilig, the cupric ion derivative of this material. Octolig consists of polyethylenediamine moieties covalently bound to a high-surface area silica gel (CAS Registry number = 404899-06-5). Perchlorate in drinking water is a nuisance anion that escapes from firms that produce rocket fuel, batteries, and fireworks and becomes a contaminant of groundwater. It may also be a natural component of the environment. Perchlorate ion can interfere with thyroid function and may also cause birth defects. Perchlorate contamination of water supplies is serious because of the difficulty in removing it, especially in the western United States where a combination of drought and water shortages exacerbate the problems of supplying safe drinking water to an increasing population. In this study, aqueous solutions were passed over a chromatography column containing samples of Cuprilig. Test water contained 70 microg perchlorate/L and effluent was below detection level (< 1 microg/L. Equally good results were obtained for Octolig in deionized water and in well water. Analyses were performed by a commercial laboratory. Mechanisms of interaction are proposed.
Martin
Dean F
DF
Institute for Environmental Studies, Department of Chemistry, University of South Florida, Tampa, Florida, USA. dmartin@cas.usf.edu
Kondis
Nicholas P
NP
Alldredge
Robert L
RL
D002853:Chromatography, Liquid; D003300:Copper / Q000737:chemistry*; D010472:Perchlorates / Q000302:isolation & purification*; D014867:Water / Q000737:chemistry*
D010472:Perchlorates; D014867:Water; D003300:Copper