Organic fouling in surface modified reverse osmosis membranes: Filtration studies and subsequent morphological and compositional characterization

Shafi, Hafiz Zahid; Matin, Asif; Akhtar, Sultan; Gleason, Karen K.; Zubair, Syed M.; Khan, Zulfiqar Ahmad

doi:10.1016/j.memsci.2017.01.017

Cited by 43 publications

(14 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The viscous alginic acid polymer induces adsorption and accumulation on the membrane surface . The adhesion of alginic acid sodium salt on membrane surface depends on the hydrogen bonding and electrostatic interaction . PES/SPEEK/TiO 2 (M5) MMMs exhibited a maximum flux of 272 L m ‐2 h ‐1 maintained at a transmembrane pressure of 200 kPa for the M5 MMMs.…”

Section: Resultsmentioning

confidence: 91%

“…7,29 The adhesion of alginic acid sodium salt on membrane surface depends on the hydrogen bonding and electrostatic interaction. 30 wileyonlinelibrary.com/jctb Overall, attachment of alginic acid sodium salt is restricted in the PES/SPEEK/TiO 2 and PES/PEG/TiO 2 MMMs Effect of pore formers on microalgae filtration studies Figure 7 and Table 3 show the flux profile and performance of neat PES and modified PES MMMs analysis of Coelastrella sp. FI69 filtration.…”

Section: Afm Topography Of the Membranesmentioning

confidence: 99%

See 1 more Smart Citation

Harvesting of microalgae Coelastrella sp. FI69 using pore former induced TiO₂ incorporated PES mixed matrix membranes

Yogarathinam

Arthanareeswaran

Ismail

et al. 2018

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

BACKGROUND Extracellular polymeric substances and microalgae stimulate membrane fouling during harvesting. The objective of the study was to compare the effect of pore formers on TiO2 embedded polyethersulfone mixed matrix membranes (MMMs) to harvest Coelastrella sp. FI69. The study experimented with hydrophilic additive (polyethylene glycol), polyelectrolyte additive (polyethylenimine), inorganic additive (zinc chloride) and charged polymer (sulfonated polyetherether ketone (SPEEK)) as pore formers. RESULTS It was found that SPEEK/TiO2 combination enhanced the hydrophilic property of the PES membrane surface. Also, contact angle value (55.22°) was decreased by 1.38 times that of a neat PES (76.63°) membrane. Morphology studies indicated that the TiO2 particles dispersed well in the PES membrane matrix along with pore formers. The existence of super hydrophilic TiO2 supported the restriction of microalgae cell attachment on the membrane surface. The filtration of alginic acid sodium solution analysis showed that PES/SPEEK/TiO2 and PES/PEG/TiO2 membranes support higher flux with minimal fouling percentage. Microalgae filtration studies indicated that synergistic effect of both SPEEK and TiO2 on PES membrane exhibited higher water recovery percentage of 96% and equilibrium flux of 66 L m‐2 h‐1. CONCLUSION Fouling propensity is significantly reduced in modified membranes. Future research on scale‐up of membranes for further microalgae dewatering applications is recommended. © 2017 Society of Chemical Industry

show abstract

Section: Resultsmentioning

confidence: 91%

Section: Afm Topography Of the Membranesmentioning

confidence: 99%

Harvesting of microalgae Coelastrella sp. FI69 using pore former induced TiO₂ incorporated PES mixed matrix membranes

Yogarathinam

Arthanareeswaran

Ismail

et al. 2018

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

show abstract

“…Nevertheless, it should be clarified that depending on feed water compositions and their interactions with membrane, both surface fouling and internal fouling can be irreversible. (Ho et al, 2016;Hu et al, 2013;Shafi et al, 2017;J. Xu et al, 2013).…”

Section: Membrane Foulingmentioning

confidence: 99%

“…2A shows the surface of a RO membrane contaminated by bacteria (J. while Fig. 2B displays the RO membrane surface that is fully covered by an organic foulant, sodium alginate (Shafi et al, 2017). Fig.…”

Section: Membrane Foulingmentioning

confidence: 99%

A review of reverse osmosis membrane fouling and control strategies

Jiang

Li²

2017

Science of The Total Environment

750

362

View full text Add to dashboard Cite

Reverse osmosis (RO) membrane technology is one of the most important technologies for water treatment. However, membrane fouling is an inevitable issue. Membrane fouling leads to higher operating pressure, flux decline, frequent chemical cleaning and shorter membrane life. This paper reviews membrane fouling types and fouling control strategies, with a focus on the latest developments. The fundamentals of fouling are discussed in detail, including biofouling, organic fouling, inorganic fouling and colloidal fouling. Furthermore, fouling mitigation technologies are also discussed comprehensively. Pretreatment is widely used in practice to reduce the burden for the following RO operation while real time monitoring of RO has the advantage and potential of providing support for effective and efficient cleaning. Surface modification could slow down membrane fouling by changing surface properties such as surface smoothness and hydrophilicity, while novel membrane materials and synthesis processes build a promising future for the next generation of RO membranes with big advancements in fouling resistance. Especially in this review paper, statistical analysis is conducted where appropriate to reveal the research interests in RO fouling and control.Graphic Abstract

show abstract

“…8) and irreversible flux decline ratio (IRDR) (Eq. 9) (Camacho et al 2013;Shafi et al 2017;Zhao et al 2014).…”

Section: Fouling Studiesmentioning

confidence: 99%

Transport properties and fouling issues of membranes utilized for the concentration of dairy products by air-gap membrane distillation and microfiltration

2018

View full text Add to dashboard Cite

The work contains results related to the application of membrane separation processes (i.e., membrane distillation and microfiltration) in dairy products processing. The performance of titania ceramic membranes (pristine as well as hydrophobized) was studied in the microfiltration process of whey and lactose solutions. On the other hand, polymeric porous hydrophobic membranes, (polypropylene-PP and polytetrafluoroethylene-PTFE) were tested in the air-gap membrane distillation (AGMD) process in contact with whey and lactose solutions. The extended material and physiochemical characterization (including fouling issues) of membrane materials before and after the separation process was performed. Transport of lactose solution across the membranes was characterized by higher effectiveness comparing with whey solution. Lactose played an important role and reduced the interactions with membrane material. Lactose solution possessed lower adhesion ability than whey what influenced the fouling and reduction of permeate flux. Membrane distillation was found to be a process that generates high-quality water with retention > 99% while simultaneously concentrating whey or lactose solutions. Microfiltration process was characterized by a rejection of lactose in the range of 80-90% for pristine ceramic membrane and hydrophobized one, respectively. The tendency to fouling in the case of AGMD process was associated with the higher contribution of polar part (29%) of the surface free energy SFE for PTFE membrane. The lowest value of normalized flux decline was observed for PP membrane, and that was correlated with the smallest contribution of polar interaction in SFE, the lowest value of roughness (RSM), contact angle (CA), and contact angle hysteresis (HCA), determined for the membrane after its utilization in the separation process. Keywords Lactose • Whey • Microfiltration • Air-gap membrane distillation • Hydrofobization of ceramics • Fouling phenomena σ L Liquid surface tensions (mN m −1) σ S Solid surface tensions (mN m −1) σ SL Interfacial surface tensions (mN m −1

show abstract

Organic fouling in surface modified reverse osmosis membranes: Filtration studies and subsequent morphological and compositional characterization

Cited by 43 publications

References 38 publications

Harvesting of microalgae Coelastrella sp. FI69 using pore former induced TiO₂ incorporated PES mixed matrix membranes

Harvesting of microalgae Coelastrella sp. FI69 using pore former induced TiO₂ incorporated PES mixed matrix membranes

A review of reverse osmosis membrane fouling and control strategies

Transport properties and fouling issues of membranes utilized for the concentration of dairy products by air-gap membrane distillation and microfiltration

Contact Info

Product

Resources

About

Organic fouling in surface modified reverse osmosis membranes: Filtration studies and subsequent morphological and compositional characterization

Cited by 43 publications

References 38 publications

Harvesting of microalgae Coelastrella sp. FI69 using pore former induced TiO2 incorporated PES mixed matrix membranes

Harvesting of microalgae Coelastrella sp. FI69 using pore former induced TiO2 incorporated PES mixed matrix membranes

A review of reverse osmosis membrane fouling and control strategies

Transport properties and fouling issues of membranes utilized for the concentration of dairy products by air-gap membrane distillation and microfiltration

Contact Info

Product

Resources

About

Harvesting of microalgae Coelastrella sp. FI69 using pore former induced TiO₂ incorporated PES mixed matrix membranes

Harvesting of microalgae Coelastrella sp. FI69 using pore former induced TiO₂ incorporated PES mixed matrix membranes