title: Comparison of anion removal capacities of Octolig and Cuprilig.
abstract: Mixtures of sodium salts of phosphate, arsenate, and fluoride were used in chromatography and batch experiments to compare the capacity of two immobilized ligands (IMLIGs) to remove these anions: Octolig and its copper (II)-based metallolig, Cuprilig. The focus of this study was twofold. First, to find out which material, Octolig or Cuprilig, would remove these anions most effectively; and secondly to determine the optimal capacity for removal of representative anions. Removal capacity was evaluated by two methods: by chromatography and by a batch method. The methods gave identical results, but the batch method was more convenient. Cuprilig had a lower capacity for removal of phosphate than Octolig. The capability of Octolig for removing anions was: phosphate > arsenate > fluoride >>> chloride >>>> bromide. Replication of phosphate removal was good for a given batch of Octolig. Of three different samples of Octolig, two seemed to be alike based on the phosphate- removal capacity; the third was different on the basis of a Student's t-test. This distinction indicates the batch procedure could serve as a quality control/assurance technique.
authors.affiliation: Institute for Environmental Studies, Department of Chemistry, University of South Florida, Tampa, Florida 33620-5250, USA. dfmartin@usf.edu
authors.forename: Dean F
authors.initials: DF
authors.lastname: Martin
authors.forename: Douglas M
authors.initials: DM
authors.lastname: Franz
mesh_terms: D000838:Anions / Q000737:chemistry*; D001149:Arsenates / Q000737:chemistry; D002845:Chromatography; D003300:Copper / Q000737:chemistry*; D007097:Imines / Q000737:chemistry*; D008024:Ligands; D010710:Phosphates / Q000737:chemistry; D011095:Polyethylenes / Q000737:chemistry*; D012969:Sodium Fluoride / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D000838:Anions; D001149:Arsenates; D007097:Imines; D008024:Ligands; D010710:Phosphates; D011095:Polyethylenes; D014874:Water Pollutants, Chemical; D003300:Copper; C009277:sodium arsenate; D012969:Sodium Fluoride; C018279:sodium phosphate