A novel analysis of reverse draw and feed solute fluxes in forward osmosis membrane process

Kim, Bongchul; Lee, Sangyoup; Hong, Seungkwan

doi:10.1016/j.desal.2014.08.012

Cited by 44 publications

(16 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…On the other hand, as depicted in Fig. 10b, the feed solute flux is predicted more accurately when B f is used in the prediction [120].…”

Section: Modeling Reverse Solute Diffusionmentioning

confidence: 95%

“…10a) and feed solute flux (Fig. 10b) with the model predictions as a function of draw solution concentration [120]. Fig.…”

Section: Phase Inversion-formed Fo Membranesmentioning

confidence: 99%

“…Recently, Kim et al [120] developed a novel method to determine reverse draw and forward feed solute fluxes in FO. The study proposed using apparent draw (B d ) and feed (B f ) solute permeability instead of single solute permeability (B) as in the previous aforementioned models (Eqs.…”

Section: Modeling Reverse Solute Diffusionmentioning

confidence: 99%

“…(26)-(30)). For the first time, both draw solute flux (J d,s ) and feed solute flux (J f,s ) were described using equations shown below that consider both concentrative ECP and dilutive ICP [120]:…”

Section: Modeling Reverse Solute Diffusionmentioning

confidence: 99%

See 3 more Smart Citations

Water desalination by forward (direct) osmosis phenomenon: A comprehensive review

et al. 2015

View full text Add to dashboard Cite

“…On the other hand, as depicted in Fig. 10b, the feed solute flux is predicted more accurately when B f is used in the prediction [120].…”

Section: Modeling Reverse Solute Diffusionmentioning

confidence: 95%

“…10a) and feed solute flux (Fig. 10b) with the model predictions as a function of draw solution concentration [120]. Fig.…”

Section: Phase Inversion-formed Fo Membranesmentioning

confidence: 99%

Section: Modeling Reverse Solute Diffusionmentioning

confidence: 99%

Section: Modeling Reverse Solute Diffusionmentioning

confidence: 99%

See 2 more Smart Citations

Water desalination by forward (direct) osmosis phenomenon: A comprehensive review

et al. 2015

View full text Add to dashboard Cite

“…In the process of FO, water transports across the membrane from the feed solution to the draw solution, while unwanted compounds are rejected by the membrane . The driving force of the FO process is from the osmotic pressure gradient across the membrane and the hydraulic pressure is not required . Compared with reverse osmosis (RO), nanofiltration (NF), the FO possesses many advantages, such as lower energy consumption, higher water recovery ratio, and anti‐fouling property .…”

Section: Introductionmentioning

confidence: 99%

Effects of organic acids on the performance of cellulose triacetate forward osmosis membrane

Kong

Zheng

Chen

et al. 2018

Polymer Engineering & Sci

View full text Add to dashboard Cite

Forward osmosis (FO) membrane performance was improved using different organic acids (formic acid, acetic acid, lactic acid) for the addition of the casting solution. Scanning electron microscope (SEM) images of all the FO CTA membranes exhibited essentially the membranes have a structure of looking like two dense skin layers and a sponge‐like supporting layer. Additionally, based on the surface roughness values analysis of Atomic Force Microscope (AFM), the membranes with lactic acid, with similar roughness to the membranes without any acid, have bigger roughness than the membranes with formic acid or acetic acid. Furthermore, the water flux of membranes with acids has been improved and the reverse salt flux decreased. The membranes with lactic acid, with an outstanding penetration performance, were utilized to test the performance when 1 mol/L sodium chloride (NaCl), magnesium chloride (MgCl2), magnesium sulfate (MgSO4), and sodium sulfate (Na2SO4) were, respectively, as the draw solutions. The results revealed that the membranes have a higher rejection ratio for MgSO4. Besides, in the process of separating oil–water mixture, the membranes with the organic acids have a better separation efficiency than the membrane without any acid during FO process and the water flux recovery rate could achieve above 90% insuring the membrane anti‐fouling. POLYM. ENG. SCI., 59:E138–E145, 2019. © 2018 Society of Plastics Engineers

show abstract

Preparation and assessment of carboxylate polyelectrolyte as draw solute for forward osmosis

Cui

Zhang

Jiang

et al. 2017

Environ Sci Pollut Res

View full text Add to dashboard Cite

Reverse draw solute diffusion not only reduces the water flux in forward osmosis (FO), but also contaminates the feed solution and eventually increases the regeneration cost of draw solution. In the present study, a new polyelectrolyte was synthesized as FO draw solute to address this problem. Acrylic acid and sodium p-styrenesulfonate monomers with hydrophilic group were used to fabricate carboxylate polyelectrolyte through free radical polymerization reaction. Results demonstrated that the osmotic pressure of carboxylate polyelectrolyte solution had a good linear relationship with concentration, and the viscosity of 0.18 g/mL solution was less than 5.4 cP. Active layer facing draw solution produced the initial water flux of 11.77 LMH and active layer facing feed solution yielded the initial water flux of 6.68 LMH when the concentration of draw solution was 0.18 g/mL. The reverse solute flux was around 1 gMH, and specific reverse solute flux of 0.18 g/mL carboxylate polyelectrolyte draw solution was 0.11 g/L which was much lower than that of traditional inorganic salts. Finally, diluted draw solution was regenerated via ultrafiltration, and the recovery efficiency of 94.78% was achieved. So, carboxylate polyelectrolyte can be suitable draw solute for FO.

show abstract

A novel analysis of reverse draw and feed solute fluxes in forward osmosis membrane process

Cited by 44 publications

References 22 publications

Water desalination by forward (direct) osmosis phenomenon: A comprehensive review

Water desalination by forward (direct) osmosis phenomenon: A comprehensive review

Effects of organic acids on the performance of cellulose triacetate forward osmosis membrane

Preparation and assessment of carboxylate polyelectrolyte as draw solute for forward osmosis

Contact Info

Product

Resources

About