Boron Removal by Polymer-Assisted Ultrafiltration

Boron Removal by Polymer-Assisted Ultrafiltration

Boron contamination of natural waters is a widespread environmental problem which lacks a cost-effective solution. Polymer-assisted ultrafiltration is a method of boron removal that is compatible with other water-treatment processes. This boron removal technique exploits the pH-dependent complexatio...

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Veröffentlicht in:Separation science and technology 1995-12, Vol.30 (20), p.3849-3859
Hauptverfasser: Smith, Bryan M., Todd, Paul, Bowman, Christopher N.
Format: Artikel
Sprache:eng
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Applied sciences
Drinking water and swimming-pool water. Desalination
Exact sciences and technology
Pollution
Water treatment and pollution
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Todd, Paul
Bowman, Christopher N.
description Boron contamination of natural waters is a widespread environmental problem which lacks a cost-effective solution. Polymer-assisted ultrafiltration is a method of boron removal that is compatible with other water-treatment processes. This boron removal technique exploits the pH-dependent complexation between boric acid and a macromolecule containing vicinal diol groups to prevent boric acid from passing through an ultrafiltration membrane. The concentration of boron in treated water was reduced from 10.5 ppm to less than 2 ppm through ultrafiltration of an aqueous solution containing boric acid and a polymer synthesized by grafting N-methyl-D-glucamine (NMG) onto poly(epichlorohydrin). The NMG groups, when tethered to the polymer, exhibited stronger affinity for boron than expected from equilibria between NMG and boric acid.
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subjects Applied sciences
Drinking water and swimming-pool water. Desalination
Exact sciences and technology
Pollution
Water treatment and pollution
title Boron Removal by Polymer-Assisted Ultrafiltration
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