Ligand-modified polyelectrolyte-enhanced ultrafiltration with electrostatic attachment of ligands. 1. Removal of Cu(II) and Pb(II) with expulsion of Ca(II)

Journal Article · Thu Dec 01 04:00:00 EST 1994 · Langmuir; (United States)

DOI:https://doi.org/10.1021/la00024a049· OSTI ID:6652473

Tuncay, M ^[1]; Christian, S D; Tucker, E E; Taylor, R W; Scamehorn, J F ^[2]

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1. Univ. of Istanbul (Turkey) Univ. of Oklahoma, Norman, OK (United States)
2. Univ. of Oklahoma, Norman, OK (United States)

A water-soluble mixture of a cationic polyelectrolyte, poly(diallyldimethylammonium chloride) or PDADMAC, and an anionic ligand, 4,5-dihydroxy-1,3-benzenedisulfonic acid, or Tiron, is used as an agent for binding divalent cations, such as Cu[sup 2+] and Pb[sup 2+]. In equilibrium dialysis experiments, the PDADMAC-Tiron mixture is shown to be effective in binding Cu[sup 2+] and Pb[sup 2+] in the retentate, while enhancing the concentration of the noncomplexed cation, Ca[sup 2+], in the permeate. In the pH range employed, the uncomplexed and complexed forms of Tiron exist primarily as divalent anions. As a consequence they are bound electrostatically to the cationic polyelectrolyte, and little of the ligand is lost through the membrane. The effects of pH, cation concentration, and presence of a competing cation (Ca[sup 2+]), and added NaCl on the retention of Cu[sup 2+] and Pb[sup 2+] are discussed. 25 refs., 4 figs., 2 tabs.

• OSTI ID: 6652473
• Journal Information: Langmuir; (United States), Journal Name: Langmuir; (United States) Vol. 10:12; ISSN LANGD5; ISSN 0743-7463
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105* -- Separation Procedures
400201 -- Chemical & Physicochemical Properties
ALKALI METAL COMPOUNDS
CALCIUM IONS
CHARGED PARTICLES
CHLORIDES
CHLORINE COMPOUNDS
COLLOIDS
COMPILED DATA
COMPLEXES
COPPER IONS
DATA
DIALYSIS
DISPERSIONS
ELECTROLYTES
ELECTROSTATICS
FILTRATION
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
INFORMATION
IONS
LEAD IONS
LIGANDS
LIQUID WASTES
MICELLAR SYSTEMS
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC POLYMERS
OXYGEN COMPOUNDS
PH VALUE
POLYMERS
SEPARATION PROCESSES
SODIUM CHLORIDES
SODIUM COMPOUNDS
ULTRAFILTRATION
WASTE WATER
WASTES
WATER