High flux and fouling resistant reverse osmosis membrane modified with plasma treated natural zeolite

Safarpour, Mahdie; Vatanpour, Vahid; Khataee, Alireza; Zarrabi, Hamed; Gholami, Peyman; Yekavalangi, Mohammad Ehsan

doi:10.1016/j.desal.2017.02.012

Cited by 97 publications

(31 citation statements)

References 40 publications

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“…Hydrophilic additives can also increase the number of surface pores and surface porosity of the modified membrane, which is obvious in the membrane samples of runs 13 and 14 and runs 4 and 5 (Table ) . The higher water flux of the membranes containing the high amount of zeolite can also be ascribed to the “negative charged centers” created by zeolite nanoparticles on the surface of the modified membrane …”

Section: Resultsmentioning

confidence: 98%

“…35 The higher water flux of the membranes containing the high amount of zeolite can also be ascribed to the "negative charged centers" created by zeolite nanoparticles on the surface of the modified membrane. 17,22 Based on the obtained results of the RSM modeling, the optimized casting solution composition for preparation of high-flux CA membranes would be 12-wt% CA, 5-wt% PVP, and 0.5-wt% plasmatreated natural zeolite.…”

Section: Surface and Counter Plotsmentioning

confidence: 99%

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Two‐stage phase separation of cellulose acetate membranes modified with plasma‐treated natural zeolite: Response surface modeling

Safarpour

Barzin

Khataee

et al. 2018

Polymers for Advanced Techs

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Cellulose acetate (CA) microfiltration membranes were prepared by two‐stage vapor‐induced phase separation (VIPS) and immersion precipitation. To improve the hydrophilicity and permeability of the membranes at low operating pressures, plasma‐treated natural zeolite was incorporated into the membranes. A response surface methodology based on the three‐level central composite design (CCD) was used to model and optimize the casting solution composition of the membranes with the aim of maximizing membranes permeability. Three independent variables for CCD optimization were concentration of CA, polyvinylpyrrolidone (PVP) pore former, and plasma‐treated zeolite additive. The results showed that a second‐order polynomial model could properly predict the response (pure water flux) at any input variable values with a satisfying determination coefficient (R2) of 0.954. Also, analysis of variance (ANOVA) confirmed the adequacy of the obtained model. The permeability of the prepared membranes increased by increasing zeolite loading from 0.10 to 0.50 wt%, which was related to the membranes morphology and porosity and confirmed by scanning electron microscopy (SEM) images. Pure water flux of the membranes decreased by increasing CA concentration while an optimum PVP amount was required to reach the maximum flux. The result of the bubble point analysis well matched with surface SEM images of the membranes and permeability trend predicted by CCD model. Also, the prepared CA membranes with different compositions showed no toxicity for mouse L929 fibroblast, which indicated their nontoxic and biocompatible nature.

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Section: Resultsmentioning

confidence: 98%

Section: Surface and Counter Plotsmentioning

confidence: 99%

Two‐stage phase separation of cellulose acetate membranes modified with plasma‐treated natural zeolite: Response surface modeling

Safarpour

Barzin

Khataee

et al. 2018

Polymers for Advanced Techs

Self Cite

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“…Dong et al [302] used NaY zeolite nanoparticles to synthesize PA TFN membranes with good salt rejection and higher water flux compared to the conventional PA TFC membrane. Safarpour et al [303] embedded plasma treated natural zeolite into the PA layer. The resulting membranes exhibited lower surface roughness and increased hydrophilicity.…”

Section: Additivesmentioning

confidence: 99%

Reverse osmosis desalination: A state-of-the-art review

et al. 2019

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Water scarcity is a grand challenge that has always stimulated research interests in finding effective means for pure water production. In this context, reverse osmosis (RO) is considered the leading and the most optimized membrane-based desalination process that is currently dominating the desalination market. In this review, various aspects of RO desalination are reviewed. Theories and models related to concentration polarization and membrane transport, as well as merits and drawbacks of these models in predicting polarization effects, are discussed. An updated review of studies related to membrane modules (plate and frame, tubular, spiral wound, and hollow fiber) and membrane characterization are provided. The review also discusses membrane cleaning and different pre-treatment technologies in place for RO desalination, such as feed-water pre-treatment and biocides. RO pre-treatment technologies, which include conventional (e.g., coagulationflocculation, media filtration, disinfection, scale inhibition) and non-conventional (e.g., MF, UF, and NF) are reviewed and their relative attributes are compared. As per the available literature, UF, MF and coagulation-flocculation are considered the most widely used pre-treatment technologies. In addition, this review discusses membrane fouling, which represents a serious challenge in RO processes due to its significant contribution to energy requirements and process economy (e.g., flux decline, permeate quality, membrane lifespan, increased feed pressure, increased pre-treatment and membrane maintenance cost). Different membrane fouling types, such as colloidal, organic, inorganic, and biological fouling, are addressed in this review. Principles of RO process design and the embedded economic and energy considerations are discussed. In general, cost of water desalination has dropped to values that made it a viable option, comparable even to conventional water treatment methods. Finally, an overview of hybrid RO desalination processes and the current challenges faced by RO desalination processes are presented and discussed.

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“…However, the addition of some particles, such as clay, can cause the ber diameter to increase. [73][74][75][76][77][78][79][80][81][82][83][84] The performance and some properties of such membranes are shown on the Table 1. MD membranes are constructed using two or three tiers of hydrophobic-hydrophilic membrane layers, unlike in the single unsupported hydrophobic-layer design.…”

Section: Membrane Fabrication For MDmentioning

confidence: 99%

Recent developments in polymeric electrospun nanofibrous membranes for seawater desalination

et al. 2018

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High flux and fouling resistant reverse osmosis membrane modified with plasma treated natural zeolite

Cited by 97 publications

References 40 publications

Two‐stage phase separation of cellulose acetate membranes modified with plasma‐treated natural zeolite: Response surface modeling

Two‐stage phase separation of cellulose acetate membranes modified with plasma‐treated natural zeolite: Response surface modeling

Reverse osmosis desalination: A state-of-the-art review

Recent developments in polymeric electrospun nanofibrous membranes for seawater desalination

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