Effect of operating parameters on boron removal from seawater using membrane distillation process

Boubakri, Ali; Bouguecha, S.; Dhaouadi, Imen; Hafiane, Amor

doi:10.1016/j.desal.2015.06.025

Cited by 63 publications

(22 citation statements)

References 29 publications

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“…44 A similar trend was also obtained by most reported studies. 45,46 In fact, the transmembrane water vapor pressure difference can be expressed as: 47 where b w , a w , g w and x w are the membrane DCMD coefficient, membrane activity, membrane activity coefficient and mole fraction of water, respectively. The subscripts w, f and p refer to water, feed and permeate, respectively.…”

Section: Effect Of Arsenic Concentrationmentioning

confidence: 99%

Removal of As(iii) and As(v) from water using green, silica-based ceramic hollow fibre membranes via direct contact membrane distillation

et al. 2019

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Section: Effect Of Arsenic Concentrationmentioning

confidence: 99%

Removal of As(iii) and As(v) from water using green, silica-based ceramic hollow fibre membranes via direct contact membrane distillation

et al. 2019

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“…However, the salt rejection was higher than 99.9% under each operation temperature. Based on the performance under different temperature, a comparison with the flat-sheet membranes reported in the recent four years was carried out and listed in Table 6 [31,[48][49][50][51][52][53][54][55][56][57][58][59][60][61]. It can be found that the PVDF-CTFE membrane prepared in this work presented higher permeate flux in MD desalination application except PES and PSf membranes modified by CF4 plasma.…”

Section: Comparison With Other Flat-sheet MD Membranesmentioning

confidence: 99%

Preparation of PVDF-CTFE hydrophobic membranes for MD application: Effect of LiCl-based mixed additives

Zheng

Wei

et al. 2016

Journal of Membrane Science

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a b s t r a c tHydrophobic flat-sheet membranes were prepared by poly (vinylidene fluoride-co-chlorotrifluoroethylene) (PVDF-CTFE) via the non-solvent induced phase separation (NIPS) process for membrane distillation (MD) application. Different types of LiCl-based mixed additives were applied to investigate their effects on membrane properties and MD performance. The membranes were evaluated in terms of membrane morphology, pore size and distribution, porosity, surface roughness, hydrophobicity, as well as the direct contact membrane distillation (DCMD) performance. Clear evidences were obtained that the mixed additives altered the phase inversion process, which resulted in the variation in membrane morphology, structure, properties and performance. The mass ratio of PEG/LiCl ranging from 5:0 to 0:5 was comprehensively investigated to study the synergistic effects of two additives on PVDF-CTFE membranes. The membrane M5 (PEG:LiCl ¼1:1, total content 8 wt% ) showed optimal properties and MD performance for combining the structure of higher hydrophobicity and pore interconnectivity, small pore size and narrow pore size distribution. The addition of LiCl to PEG-containing solutions benefited the solid-liquid demixing process, which increased the hydrophobicity, porosity, pore interconnectivity, and MD performance of the resultant membranes. While added PEG to LiCl-containing solutions showed slightly influences. Furthermore, it was also found that PVP/LiCl and glycerol/LiCl were not suitable for hydrophobic membrane preparation as they strikingly reduced membrane hydrophobicity. While H 3 PO 4 and H 2 O were confirmed suitable to mix with LiCl for hydrophobic PVDF-CTFE membrane preparation.

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“…The initial LEP was 1.8, while the LEP of the membrane after 80 h of operation equals 1.4 bar. This reduction is caused by the reduced surface tension after long term exposure to salts, which is also reported in the literature [51]. However, this reduction is not severe enough to indicate that the coating is washed off during operation.…”

Section: Medium Term Performancementioning

confidence: 56%

Functionalization of a Hydrophilic Commercial Membrane Using Inorganic-Organic Polymers Coatings for Membrane Distillation

et al. 2017

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Membrane distillation is a thermal separation technique using a microporous hydrophobic membrane. One of the concerns with respect to the industrialization of the technique is the development of novel membranes. In this paper, a commercially available hydrophilic polyethersulfone membrane with a suitable structure for membrane distillation was modified using available hydrophobic coatings using ORMOCER ® technology to obtain a hydrophobic membrane that can be applied in membrane distillation. The surface modification was performed using a selection of different components, concentrations, and application methods. The resulting membranes can have two hydrophobic surfaces or a hydrophobic and hydrophilic surface depending on the application method. An extensive characterization procedure confirmed the suitability of the coating technique and the obtained membranes for membrane distillation. The surface contact angle of water could be increased from 27 • up to 110 • , and fluxes comparable to membranes commonly used for membrane distillation were achieved under similar process conditions. A 100 h test demonstrated the stability of the coating and the importance of using sufficiently stable base membranes.

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Effect of operating parameters on boron removal from seawater using membrane distillation process

Cited by 63 publications

References 29 publications

Removal of As(iii) and As(v) from water using green, silica-based ceramic hollow fibre membranes via direct contact membrane distillation

Removal of As(iii) and As(v) from water using green, silica-based ceramic hollow fibre membranes via direct contact membrane distillation

Preparation of PVDF-CTFE hydrophobic membranes for MD application: Effect of LiCl-based mixed additives

Functionalization of a Hydrophilic Commercial Membrane Using Inorganic-Organic Polymers Coatings for Membrane Distillation

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