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Degradation of polyamide reverse osmosis membranes in the presence of chloramine

Cran, Marlene Jane and Bigger, Stephen W and Gray, Stephen R (2011) Degradation of polyamide reverse osmosis membranes in the presence of chloramine. Desalination, 283 (1). pp. 58-63. ISSN 0011-9164

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Abstract

Exposure to relatively low concentrations of chlorinated chemicals such as hypochlorite can reduce the performance and ultimately result in the failure of polyamide (PA) reverse osmosis membranes. Whereas the tolerance of PA membranes to chloramine solutions is considerably higher than that of hypochlorite, the presence of some metal ions can potentially catalyze and accelerate degradation reactions. Spectroscopic techniques are commonly used to qualitatively assess the chemical degradation of membranes by observing changes in structural peaks. This paper presents a technique to quantitatively evaluate changes in PA membranes exposed to chloramine by means of a peak ratio derived from a typical amide peak and an invariant peak in the same spectrum. The effect of some common metal ions and combinations of these on the peak ratio parameter derived from a typical amide peak is also reported.

Item Type: Article
Uncontrolled Keywords: ResPubID22927, polyamide membranes, chloramine, hypochlorite, degradation, Fourier-transform infrared spectroscopy
Subjects: FOR Classification > 0303 Macromolecular and Materials Chemistry
SEO Classification > 9611 Physical and Chemical Conditions of Water
Faculty/School/Research Centre/Department > Institute for Sustainability and Innovation (ISI)
Depositing User: VUIR
Date Deposited: 28 Jun 2012 06:39
Last Modified: 28 Jul 2014 04:10
URI: http://vuir.vu.edu.au/id/eprint/7674
DOI: 10.1016/j.desal.2011.04.050
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Citations in Scopus: 4 - View on Scopus

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