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Bibliographic Data
Control Number45591
Date and Time of Latest Transaction20150409034252.AM
General Information150409s |||||||||b ||00|||
Cataloging SourcePNRI-DOST
Local Call NumberQD562 I63G3 2000
Main Entry - Personal NameGarcia, Corazon M.
Title StatementIon separation from dilute electrolyte solution by nanofiltration a dissertation
Physical Descriptionxiii, 136 leaves ill., tabs. 28 cm
Summary, Etc.Nanofiltration (NF) is a pressure-driven process which is considered potential for the separation of ionic selectively from solutions containing mixture of electrolyte solutes. The lower operating pressure requirements of NF than reverse osmosis (RO) makes the earlier potentially economical. In the separation of ions, many authors believed that there are membranes with characteristic fixed surface charge and the mechanism of separation of ions is by the differences in valences of the ions. In this study, experiments involving dilute single-solute and multiple-solute electrolyte solutions were performed using three different NF membranes. Permeate fluxes and ion rejections of the different species of ions in samples of permeate solutions were measured at varied conditions. The mechanism of separation in NF was determined based on the analysis of the trends and behavior of ion rejection relative to the solution temperature, pressure, type of solute, feed concentration and feed solution pH. The results of the experiments showed that there is no evidence of the presence of fixed surface charge on the NF membranes. Ion separation was made possible by the combination of sieve effect and ion hydration effect. Ions having higher hydration numbers showed higher ion rejection than those having lower hydration numbers. A method to determine the effective membrane pore size of NF membranes using hydrodynamic model was proposed. The proposed method is based on the assumptions that the membrane is neutral and that the separation is based on sieving effect
Subject Added Entry - Topical TermNanofiltration -- Ion separation -- Dissertation
 Ion-permeable membranes -- Ion separation by nanofiltration -- Dissertation
 Electrolyte solution, Dilute -- Ion separatation by nanofiltration -- Dissertation
LocationDOST PNRI QD562 I63G3 2000 (Fil) 392 1 C 0000-00-00
  
     
 
Physical Location
Department of Science and Technology
Philippine Nuclear Research InstituteQD562 I63G3 2000
  
     
 
Digital Copy
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