Reverse osmosis membrane composition, structure and performance modification by bisulphite, iron(III), bromide and chlorite exposure
10.1016/j.watres.2016.07.013
Inclou dades d'ús des de 2022
Cita com:
hdl:2117/99989
Tipus de documentArticle
Data publicació2016-10-15
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Abstract
Reverse osmosis (RO) membrane exposure to bisulphite, chlorite, bromide and iron(III) was assessed in terms of membrane composition, structure and performance. Membrane composition was determined by Rutherford backscattering spectrometry (RBS) and membrane performance was assessed by water and chloride permeation, using a modified version of the solution-diffusion model. Iron(III) dosage in presence of bisulphite led to an autooxidation of the latter, probably generating free radicals which damaged the membrane. It comprised a significant raise in chloride passage (chloride permeation coefficient increased 5.3–5.1 fold compared to the virgin membrane under the conditions studied) rapidly. No major differences in terms of water permeability and membrane composition were observed. Nevertheless, an increase in the size of the network pores, and a raise in the fraction of aggregate pores of the polyamide (PA) layer were identified, but no amide bond cleavage was observed. These structural changes were therefore, in accordance with the transport properties observed.
CitacióFerrer, O., Gibert, O., Cortina, J. Reverse osmosis membrane composition, structure and performance modification by bisulphite, iron(III), bromide and chlorite exposure. "Water research (Oxford)", 15 Octubre 2016, vol. 103, p. 256-263.
ISSN0043-1354
Versió de l'editorhttp://www.sciencedirect.com/science/article/pii/S0043135416305176
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Manuscript RO.pdf | 263,3Kb | Visualitza/Obre |