A comparative study of boron and arsenic (III) rejection from brackish water by reverse osmosis membranes

Handle URI:
http://hdl.handle.net/10754/594260
Title:
A comparative study of boron and arsenic (III) rejection from brackish water by reverse osmosis membranes
Authors:
Teychene, Benoît; Collet, Gaelle; Gallard, Hervé; Croue, Jean Philippe
Abstract:
This study aims to compare at lab-scale the rejection efficiency of several reverse osmosis membranes (RO) toward arsenic (III) and boron during the filtration of a synthetic brackish water. The effect of pH and operating conditions on the rejection of each RO membrane was studied. Two types of membrane were investigated: "brackish water" and "sea water" membranes. Our results showed that the metalloid rejection depends on the membrane type, pH and transmembrane pressure applied. Increasing pH above the dissociation constant (pKa) of each specie improves significantly the metalloid rejection by RO membranes, whatever the membrane type. Moreover, at identical operating conditions (pH, transmembrane pressure), results showed that the brackish water membranes have a higher water flux and exhibit lower metalloid rejection. The highest As(III) rejection value for the tested brackish water membranes was 99% obtained at pH = 9.6 and 40 bars, whereas it was found that the sea water RO membranes could highly reject As(III), more than 99%, even at low pH and low pressure (pH = 7.6 and 24 bars).Regarding Boron rejection, similar conclusions could be drawn. The sea water RO membranes exert higher removal, with a high rejection value above 96% over the tested conditions. More generally, this study showed that, whatever the operating conditions or the tested membranes, the boron and As(III) permeate concentrations are below the WHO guidelines. In addition, new data about the boron and arsenic permeability of each tested RO membrane was brought thanks to a theoretical calculation. © 2012 Elsevier B.V.
KAUST Department:
Water Desalination and Reuse Research Center (WDRC)
Citation:
Teychene B, Collet G, Gallard H, Croue J-P (2013) A comparative study of boron and arsenic (III) rejection from brackish water by reverse osmosis membranes. Desalination 310: 109–114. Available: http://dx.doi.org/10.1016/j.desal.2012.05.034.
Publisher:
Elsevier BV
Journal:
Desalination
Issue Date:
Feb-2013
DOI:
10.1016/j.desal.2012.05.034
Type:
Article
ISSN:
0011-9164
Appears in Collections:
Articles; Water Desalination and Reuse Research Center (WDRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorTeychene, Benoîten
dc.contributor.authorCollet, Gaelleen
dc.contributor.authorGallard, Hervéen
dc.contributor.authorCroue, Jean Philippeen
dc.date.accessioned2016-01-19T14:44:36Zen
dc.date.available2016-01-19T14:44:36Zen
dc.date.issued2013-02en
dc.identifier.citationTeychene B, Collet G, Gallard H, Croue J-P (2013) A comparative study of boron and arsenic (III) rejection from brackish water by reverse osmosis membranes. Desalination 310: 109–114. Available: http://dx.doi.org/10.1016/j.desal.2012.05.034.en
dc.identifier.issn0011-9164en
dc.identifier.doi10.1016/j.desal.2012.05.034en
dc.identifier.urihttp://hdl.handle.net/10754/594260en
dc.description.abstractThis study aims to compare at lab-scale the rejection efficiency of several reverse osmosis membranes (RO) toward arsenic (III) and boron during the filtration of a synthetic brackish water. The effect of pH and operating conditions on the rejection of each RO membrane was studied. Two types of membrane were investigated: "brackish water" and "sea water" membranes. Our results showed that the metalloid rejection depends on the membrane type, pH and transmembrane pressure applied. Increasing pH above the dissociation constant (pKa) of each specie improves significantly the metalloid rejection by RO membranes, whatever the membrane type. Moreover, at identical operating conditions (pH, transmembrane pressure), results showed that the brackish water membranes have a higher water flux and exhibit lower metalloid rejection. The highest As(III) rejection value for the tested brackish water membranes was 99% obtained at pH = 9.6 and 40 bars, whereas it was found that the sea water RO membranes could highly reject As(III), more than 99%, even at low pH and low pressure (pH = 7.6 and 24 bars).Regarding Boron rejection, similar conclusions could be drawn. The sea water RO membranes exert higher removal, with a high rejection value above 96% over the tested conditions. More generally, this study showed that, whatever the operating conditions or the tested membranes, the boron and As(III) permeate concentrations are below the WHO guidelines. In addition, new data about the boron and arsenic permeability of each tested RO membrane was brought thanks to a theoretical calculation. © 2012 Elsevier B.V.en
dc.publisherElsevier BVen
dc.subjectArsenic (III)en
dc.subjectBoronen
dc.subjectBrackish wateren
dc.subjectReverse osmosisen
dc.titleA comparative study of boron and arsenic (III) rejection from brackish water by reverse osmosis membranesen
dc.typeArticleen
dc.contributor.departmentWater Desalination and Reuse Research Center (WDRC)en
dc.identifier.journalDesalinationen
dc.contributor.institutionInstitut de Chimie des Milieux et des Matériaux de Poitiers (IC2MP UMR 7285), École Nationale Supérieure d'Ingénieurs de Poitiers (ENSIP), Université de Poitiers, Bâtiment 16, 1 rue Marcel Doré, 86022 Poitiers Cedex, Franceen
kaust.authorCroue, Jean-Philippeen
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