Surface modification of PVDF membranes for treating produced waters by direct contact membrane distillation

Anari, Zahra; Sengupta, Arijit; Sardari, Kamyar; Wickramasinghe, S. Ranil

doi:10.1016/j.seppur.2019.05.032

Cited by 40 publications

(19 citation statements)

References 48 publications

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“…A membrane for MD desires a symmetric/asymmetric, porous, no macro voids, selected thickness (0.2–1.0 μm) and desired pore size (0.2–0.3 μm) 4 . Most studies modified the commercial membranes to fulfil the desired membrane for MD application by various methods, such as via surface coating and macro puncture on the membrane support layer 5–7 . From the previous studies, it shows that porous polymeric membranes were formed by several parameters, such as the addition of nanoparticles (NPs), the membrane thickness and the blending of polymer with its copolymer.…”

Section: Introductionmentioning

confidence: 99%

Effect of ZnO nanoparticles loading in double‐layer polyvinylidene fluoride membrane for desalination via direct contact membrane distillation

Radzi

Ahmad

2020

Asia-Pacific J Chem Eng

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In this study, double‐layer flat sheet membranes consist of nanocomposite polyvinylidene fluoride (PVDF)–ZnO layer on the top, whereas pristine polymeric PVDF on the bottom was fabricated via the double‐casting phase inversion (DCPI) method. The nanocomposite layer was prepared by loading 0.5%, 1.0%, 1.5% and 2.0% of ZnO nanoparticles. The morphology of the membranes changed as ZnO nanoparticles were introduced in the top layer, where the structure is more rigid and porous than the bottom layer. The increment concentration of nanoparticles in the top layer of the double‐layer membrane gives an effect in increasing of water contact angle slightly, which is from 136° to 140°. Furthermore, the liquid entry pressure of water (LEPw) decreases gradually from 0.69 to 0.4 bar with a high concentration of ZnO due to the presence of large pores. The increment concentration of ZnO nanoparticles also resulted in high porosity and reduced pore size, which reduce the resistance of water vapour to pass through the pores as well as enhancing the performance of membrane distillation (MD). Direct contact membrane distillation (DCMD) experiments were carried out to evaluate the efficiency of the fabricated double‐layer membrane in the desalination of seawater from fish farm water for 6‐h operation. The optimal double‐layer membrane with 0.5% ZnO nanoparticles loading maintained a stable flux of 9.42 L/m2h with 99.9% salt rejection and has antifouling properties. The results indicated that the fabricated double‐layer membrane via the DCPI method fulfils the required properties for MD application with excellent salt rejection.

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Section: Introductionmentioning

confidence: 99%

Effect of ZnO nanoparticles loading in double‐layer polyvinylidene fluoride membrane for desalination via direct contact membrane distillation

Radzi

Ahmad

2020

Asia-Pacific J Chem Eng

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“…Minimal pretreatment of the feed is required. To avoid the fouling caused by the hydrophobic interaction between the membrane surface and organic species present in solution, pretreatment like electro‐coagulation may be effective (Anari, Sengupta, Sardari, & Wickramasinghe, ; Kamaz, Sengupta, Gutierrez, Chiao, & Wickramasinghe, ). To avoid concentration polarization different hydrodynamics in membrane modules, bubbling inert gas through feed side, ritz vortex method, and so on, can be applied (Tijing et al, ).…”

Section: Resultsmentioning

confidence: 99%

Combined Osmotic and Membrane Distillation for Concentration of Anthocyanin from Muscadine Pomace

Anari¹,

Mai

Sengupta³

et al. 2019

Journal of Food Science

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Bioactive anthocyanins from aqueous extracts of muscadine grape pomace were concentrated using osmotic distillation (OD) and direct contact membrane distillation (DCMD) using polypropylene (PP) and poly(ethylene chlorotrifluoroethylene) (ECTFE) membranes. The driving force for OD is created by using a high concentration brine solution while the driving force for DCMD is generated by elevating the feed temperature relative to the permeate temperature. The brine concentration used was 4 M. The lowest fluxes were obtained for OD. Given the temperature sensitive nature of anthocyanins, the maximum temperature difference during DCMD was limited to 30 °C. The feed temperature was 40 °C and the permeate at 10 °C. Consequently, the maximum flux during DCMD was also limited. A combination of OD and DCMD was found to give the highest fluxes. High‐performance liquid chromatography (HPLC) and HPLC‐electrospray mass spectrometry were used to identify and quantify anthocyanins, cyanidin‐3,5‐O‐diglucoside, delphinidin‐3,5‐O‐diglucoside, petunidin‐3,5‐O‐diglucoside, peonidin‐3,5‐O‐diglucoside, and malvidin‐3,5‐O‐diglucoside. The results obtained here suggest that, though water fluxes for DI water feed streams for PP and ECTFE membrane were similar, the fluxes obtained for the two membranes when using muscadine pomace extracts were different. Concentration factors of close to 3 was obtained for anthocyanins. Membranes also showed slightly different performance in the concentration process. Membrane surfaces were analyzed using scanning electron microscopy and Fourier‐transformed infrared spectroscopy. The results suggest that adsorption of these anthocyanins on the membrane surface lead to performance differences. In an actual operation, selection of an appropriate membrane and regeneration of the membrane will be important for optimized performance. Practical Applications Anthocyanins are valuable therapeutic compounds, which are found in the solid residue left following fruit juice pressing. However, recovery and concentration of these therapeutic compounds remains challenging due to their stability. Here, a novel membrane‐based unit operation has been investigated in order to concentrate the anthocyanins that have been extracted into aqueous solutions. The unit operation investigated here use mild processing conditions. Insights into the factors that need to be considered when optimizing of the unit operation for commercialization are discussed.

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“…There are many different MD techniques such as air gap MD (Meindersma et al, 2006), sweeping gas MD (Shirazi et al, 2014), and permeate gap MD (Shirazi et al, 2014). A process which has lately been considered for PW treatment is the direct contact membrane distillation (DCMD) (Ali et al, 2018;Anari et al, 2019;Zou et al, 2020). DCMD is a membrane process in which the aqueous feed and permeate are kept in different temperatures while in contact with a hydrophobic membrane which hinders the liquid permeation but allows the vapor to pass (Lawson and Lloyd, 1996;Ashoor et al, 2016); the temperature difference leads to a vapor pressure difference that drives the flux through the membrane from hot feed to the cold permeate (Lawson and Lloyd, 1996;Ashoor et al, 2016).…”

Section: Produced Water Treatmentmentioning

confidence: 99%

The Role of Membrane-Based Technologies in Environmental Treatment and Reuse of Produced Water

Zolghadr

Firouzjaei

Amouzandeh

et al. 2021

Front. Environ. Sci.

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Produced water (PW) generation has been increasing recently due to the expansion of fossil fuel extraction and the aging of oil wells worldwide, especially in the United States. The adverse health risks, seismicity, and environmental impacts associated with PW have become a challenging concern. Therefore, there is increased demand for improved PW treatment and reuse management options. There are multiple methods for treating PW; this article focuses on treatment through membrane filtration. Moreover, this mini review aims to summarize statistics on PW abundance and trends in PW generation over time, to briefly call attention to health-related issues, highlight some treatment challenges, and mention the potential purposes for reuse with an emphasis on the United States, the largest generator of PW worldwide.

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Surface modification of PVDF membranes for treating produced waters by direct contact membrane distillation

Cited by 40 publications

References 48 publications

Effect of ZnO nanoparticles loading in double‐layer polyvinylidene fluoride membrane for desalination via direct contact membrane distillation

Effect of ZnO nanoparticles loading in double‐layer polyvinylidene fluoride membrane for desalination via direct contact membrane distillation

Combined Osmotic and Membrane Distillation for Concentration of Anthocyanin from Muscadine Pomace

The Role of Membrane-Based Technologies in Environmental Treatment and Reuse of Produced Water

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