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Title: Measurement of binding constants of poly(ethylenimine) with metal ions and metal chelates in aqueous media by ultrafiltration

Equilibrium constants for the binding of poly(ethylenimine) (PEI) with metal ions and metal chelates of ethylenediaminetetraacetic acid and nitrilotriacetic acid in the aqueous sulfate solutions were determined by batch ultrafiltration (UF) in the pH range of 3.0--3.8. The average coordination number of PEI groups interacting with one metal ion and metal chelate was also obtained by varying the initial concentration ratio of PEI to metal ion. A simple chemical equilibrium model proposed in this work enabled the authors to satisfactorily predict the rejection coefficient of UF of metal ions and metal chelates in the presence of PEI. Also, the effect of the formation of soluble hydroxy complexes of metal chelates on their retention was emphasized.
Authors:
;  [1]
  1. Yuan-Ze Inst. of Technology, Taoyuan (Taiwan, Province of China). Dept. of Chemical Engineering
Publication Date:
OSTI Identifier:
256862
Resource Type:
Journal Article
Resource Relation:
Journal Name: Industrial and Engineering Chemistry Research; Journal Volume: 35; Journal Issue: 6; Other Information: PBD: Jun 1996
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 54 ENVIRONMENTAL SCIENCES; IMINES; SORPTIVE PROPERTIES; ORGANIC POLYMERS; METALS; ADSORPTION; ULTRAFILTRATION; WASTE WATER; WATER TREATMENT; CHEMICAL BONDS; MATHEMATICAL MODELS; REMOVAL; EFFICIENCY