Removal of chromium ions from aqueous solutions by polymer-enhanced ultrafiltration

Aroua, M.K.; Zuki, F.M.; Sulaiman, N.M. (2007) Removal of chromium ions from aqueous solutions by polymer-enhanced ultrafiltration. Journal of Hazardous Materials, 147 (3). pp. 752-758. ISSN 0304-3894

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This study deals with the removal of chromium species from aqueous dilute solutions using polymer-enhanced ultrafiltration (PEUF) process. Three water soluble polymers, namely chitosan, polyethyleneimine (PEI) and pectin were selected for this study. The ultrafiltration studies were carried out using a laboratory scale ultrafiltration system equipped with 500,000 MWCO polysulfone hollow fiber membrane. The effects of pH and polymer composition on rejection coefficient and permeate flux at constant pressure have been investigated. For Cr(III), high rejections approaching 100 were obtained at pH higher than 7 for the three tested polymers. With chitosan and pectin, Cr(VI) retention showed a slight increase with solution pH and did not exceed a value of 50. An interesting result was obtained with PEI. The retention of Cr(VI) approached 100 at low pH and decreased when the pH was increased. This behavior is opposite to what one can expect in the polymer-enhanced ultrafiltration of heavy metals. Furthermore, the concentration of polymer was found to have little effect on rejection. Permeate flux remained almost constant around 25 of pure water flux.

Item Type: Article
  1. Aroua, M.K.(Department of Chemical Engineering, Faculty of Engineering Building, University of Malaya, 50603 Kuala Lumpur, MALAYSIA)
  2. Zuki, F.M.
  3. Sulaiman, N.M.
Journal or Publication Title: Journal of Hazardous Materials
Additional Information: Cited By (since 1996):65 Export Date: 21 April 2013 Source: Scopus CODEN: JHMAD :doi 10.1016/j.jhazmat.2007.01.120 PubMed ID: 17339078 Language of Original Document: English Correspondence Address: Aroua, M.K.; Department of Chemical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia; email: : Chemicals/CASchitosan, 9012-76-4; chromium, 16065-83-1, 7440-47-3; pectin, 9000-69-5; polyethyleneimine, 74913-72-7; polysulfone, 25135-51-7; Chitosan, 9012-76-4; Chromium, 7440-47-3; pectin, 9000-69-5; Pectins; Polyethyleneimine, 9002-98-6; Polymers; Solutions References: Kozlowski, C.A., Walkowiak, W., Removal of chromium(VI) from aqueous solutions by polymers inclusion membranes (2002) Water Res., 36, pp. 4870-4876; Juang, R.-S., Chiou, C.-H., Ultrafiltration rejection of dissolved ions using various weakly basic water-soluble polymers (2000) J. Membr. 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Uncontrolled Keywords: Chitosan Chromium Pectin PEI PEUF Membranes pH effects Removal Solutions Ultrafiltration Polymer-enhanced ultrafiltration Rejection coefficient Water flux Ions polyethyleneimine polymer polysulfone heavy metal pollutant removal aqueous solution article atomic emission spectrometry hollow fiber membrane performance pH water standard Hydrogen-Ion Concentration Pectins Polymers Water Purification
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
T Technology > TP Chemical technology
Divisions: Faculty of Engineering
Depositing User: Mr Jenal S
Date Deposited: 17 Jul 2013 14:51
Last Modified: 11 Dec 2013 11:29

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