Flux enhancement of thin film composite RO membrane by controlled chlorine treatment

Raval, Hiren D.; Trivedi, J.J.; Joshi, Sumit; Devmurari, C.V.

doi:10.1016/j.desal.2009.05.005

Cited by 81 publications

(35 citation statements)

References 13 publications

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“…Therefore, the effect of ClO -on the PA is more significant at basic pH. These results are in concordance with other works found in the literature and are reported as the most commons consequences of PA membranes exposure to hypochlorite ion [18,24,30].…”

Section: Permeability and Salt Rejection Coefficients Of Transformed supporting

confidence: 95%

Transformation of end-of-life RO membranes into NF and UF membranes: Evaluation of membrane performance

García-Pacheco

Landaburu-Aguirre

Molina

et al. 2015

Journal of Membrane Science

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Section: Permeability and Salt Rejection Coefficients Of Transformed supporting

confidence: 95%

Transformation of end-of-life RO membranes into NF and UF membranes: Evaluation of membrane performance

García-Pacheco

Landaburu-Aguirre

Molina

et al. 2015

Journal of Membrane Science

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“…Kang et al (2007) evaluated membrane performance before and after hypochlorite exposure in a soaking mode and reported that membrane N-chlorinated polyamide amide can be regenerated to initial amide and subsequent flux increase with the alkaline hypochlorite treatment. The enhanced flux of membranes chlorinated in a controlled alkaline pH condition was also reported by Raval et al (2010). However, the cause of flux increase after chlorination in alkaline environment was not systematically explained.…”

Section: Introductionmentioning

confidence: 62%

Effect of chlorination condition and permeability of chlorine species on the chlorination of a polyamide membrane

Jun

Kwon

2012

Water Research

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“…A significant improvement in water flux of TFC RO membrane by controlled sodium hypochlorite treatment for controlled time and high pH has been observed . The polyamide layer has been modified by a supramolecular assembly of chitosan over the barrier layer to improve its performance .…”

Section: Introductionmentioning

confidence: 99%

A novel high‐flux thin film composite reverse osmosis membrane modified by polysaccharide supramolecular assembly

Raval

Gondaliya

2017

J of Applied Polymer Sci

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Thin film composite reverse osmosis (TFC RO) membrane is widely used in desalination and water reuse applications. With increasing capacity of Reverse Osmosis desalination all over the world, the increasing green‐house gas emission for the required power is a cause of concern. TFC RO membrane is composed of the top polyamide layer over which, the linear polysaccharide such as chitosan can bind after activating the surface with oxidizing agent. The present paper analyzes the novel protocol of controlled oxidation of TFC RO membrane by exposing the same to potassium per sulfate with varying concentration of chitosan followed by sodium hypochlorite and sodium hypochlorite followed by potassium per sulfate with varying concentration of chitosan. The optimum performance was obtained when TFC RO membrane was exposed to 1% potassium persulfate with 1000 mg/L chitosan solution followed by 1000 mg/L sodium hypochlorite. Reversing order of the treatment resulted in the decline in permeance of the membrane. The reason of improvement in permeance is super‐hydrophilic surface formed by oxidation of chitosan over polyamide surface. Thus, this article demonstrates the novel protocol of significantly improving the flux of TFC RO membrane and thereby reducing the energy consumption. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45026.

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Flux enhancement of thin film composite RO membrane by controlled chlorine treatment

Cited by 81 publications

References 13 publications

Transformation of end-of-life RO membranes into NF and UF membranes: Evaluation of membrane performance

Transformation of end-of-life RO membranes into NF and UF membranes: Evaluation of membrane performance

Effect of chlorination condition and permeability of chlorine species on the chlorination of a polyamide membrane

A novel high‐flux thin film composite reverse osmosis membrane modified by polysaccharide supramolecular assembly

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