PEG-coated reverse osmosis membranes: Desalination properties and fouling resistance

Sagle, Alyson C.; Wagner, Elizabeth M. Van; Ju, Hao; McCloskey, Bryan D.; Freeman, Benny D.; Sharma, Mukul M.

doi:10.1016/j.memsci.2009.05.013

Cited by 268 publications

(114 citation statements)

References 55 publications

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“…Less and slower biofilm development on the coated membrane may be explained by less bacterial cell attachment, more cell detachment or both. In other words, less cells accumulated on the coated membrane but more EPS especially proteins were produced by the biofilm, which is in agreement with literature [9,48,[50][51][52][53][54].…”

Section: Impact Of the Coating On The Biofouling Ratesupporting

confidence: 93%

“…In some other cases short-term (2-24 h) cross-flow or dead end filtration tests were used to evaluate the impact of the coating on biofilm accumulation [9,16,[45][46][47].…”

Section: Need For Long-term Biofouling Studiesmentioning

confidence: 99%

“…Bacterial cell-membrane surface interaction is important in the early stage of biofilm development [49,50]. Surface properties such as roughness, charge and free energy impact bacterial cell attachment [9,51]. Extracellular proteins play an important role in bacterial attachment, with a strong polysaccharide production in mature biofilms [50,52].…”

Section: Impact Of the Coating On The Biofouling Ratementioning

confidence: 99%

“…Deposition of foulants is less likely on neutral or close to neutrally charged membrane surfaces [7,8]. Surface morphology has a significant role on membrane fouling, because foulants are more likely to be entrained by rougher topologies than by smoother membrane surfaces [6,9].…”

Section: Introductionmentioning

confidence: 99%

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Coating of reverse osmosis membranes with amphiphilic copolymers for biofouling control

Bucs¹,

Linares²,

Siddiqui³

et al. 2017

Desalination and Water Treatment

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a b s t r a c tSurface coating of membranes may be a promising option to control biofilm development and biofouling impact on membrane performance of spiral-wound reverse osmosis (RO) systems. The objective of this study was to investigate the impact of an amphiphilic copolymer coating on biofilm formation and biofouling control. The coating was composed of both hydrophilic and hydrophobic monomers hydroxyethyl methacrylate (HEMA) and perfluorodecyl acrylate (PFA), respectively. Commercial RO membranes were coated with HEMA-PFA copolymer film. Long and short term biofouling studies with coated and uncoated membranes and feed spacer were performed using membrane fouling simulators (MFSs) operated in parallel, fed with water containing nutrients. For the long-term studies pressure drop development in time was monitored and after eight days the MFSs were opened and the accumulated biofilm on the membrane and spacer sheets was quantified and characterized. The presence of the membrane coating was determined using X-ray photoelectron spectroscopy (XPS) and Fourier transform infrared spectroscopy (FTIR). Results showed that the amphiphilic coating (i) delayed biofouling (a lower pressure drop increase by a factor of 3 and a lower accumulated active biomass amount by a factor of 6), (ii) influenced the biofilm composition (23% lower polysaccharides and 132% higher protein content) and (iii) was still completely present on the membrane at the end of the biofouling study, showing that the coating was strongly attached to the membrane surface. Using coated membranes and feed spacers in combination with advanced cleaning strategies may be a suitable way to control biofouling.

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Section: Impact Of the Coating On The Biofouling Ratesupporting

confidence: 93%

“…In some other cases short-term (2-24 h) cross-flow or dead end filtration tests were used to evaluate the impact of the coating on biofilm accumulation [9,16,[45][46][47].…”

Section: Need For Long-term Biofouling Studiesmentioning

confidence: 99%

Section: Impact Of the Coating On The Biofouling Ratementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Coating of reverse osmosis membranes with amphiphilic copolymers for biofouling control

Bucs¹,

Linares²,

Siddiqui³

et al. 2017

Desalination and Water Treatment

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show abstract

“…Oceans constitute 97% of water on earth which is undrinkable [6]. The surface water and water melted from glaciers are the two main sources of potable water, which constitute less than 0.4% of total water [4,[7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Short Communication: Requiring Reverse Osmosis Membranes Modifications – An Overview

Ghernaout¹

2017

AJCHE

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Do really reverse osmosis (RO) membranes need modification to cover their disadvantages or enhance their efficiency? Are there any defects in RO membranes manufacturing that require modification? These questions are discussed here in this short review. Through the world, there are thousands of patents, publications, and PhD theses dealing with surface modification and grafting of RO membranes. This growing phenomenon should attract the attention of the scientific community for technologic and economic reasons. Due to the increasing water pollution levels, which overpassed the RO membranes capacities, there is an urgent need to manufacture RO membranes, with multidisciplinary characteristics and high performance regarding both salts removal and fouling resistance, before sending them to the market and avoiding to think to their following modification.

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Responsive Membranes for Water Treatment

Yang

Wickramasinghe

2012

Responsive Membranes and Materials

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PEG-coated reverse osmosis membranes: Desalination properties and fouling resistance

Cited by 268 publications

References 55 publications

Coating of reverse osmosis membranes with amphiphilic copolymers for biofouling control

Coating of reverse osmosis membranes with amphiphilic copolymers for biofouling control

Short Communication: Requiring Reverse Osmosis Membranes Modifications – An Overview

Responsive Membranes for Water Treatment

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