Phosphorus recovery in an acidic environment using layer-by-layer modified membranes

Remmen, Kirsten; Müller, Barbara; Köser, Joachim; Weßling, Matthias; Wintgens, Thomas

doi:10.1016/j.memsci.2019.03.023

Cited by 47 publications

(20 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Modification by polyelectrolyte is a promising approach for development of antifouling membranes due to polyelectrolyte’s high hydration ability, possibility to tune surface charge and versatility of chemistry, structure and modification techniques which can be implemented [ 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 ]. Moreover, modification by polyelectrolytes is a flexible instrument for design of thin film composite membranes for microfiltration [ 29 ], ultrafiltration (UF) [ 30 , 31 , 32 , 33 , 34 , 35 , 36 ], nanofiltration (NF) [ 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 ,…”

Section: Introductionmentioning

confidence: 99%

Modification of Polysulfone Ultrafiltration Membranes via Addition of Anionic Polyelectrolyte Based on Acrylamide and Sodium Acrylate to the Coagulation Bath to Improve Antifouling Performance in Water Treatment

et al. 2020

View full text Add to dashboard Cite

Surface modification of polysulfone ultrafiltration membranes was performed via addition of an anionic polymer flocculant based on acrylamide and sodium acrylate (PASA) to the coagulation bath upon membrane preparation by non-solvent induced phase separation (NIPS). The effect of PASA concentration in the coagulant at different coagulation bath temperatures on membrane formation time, membrane structure, surface roughness, hydrophilic-hydrophobic balance of the skin layer, surface charge, as well as separation and antifouling performance was studied. Scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared (FTIR) spectroscopy, contact angle and zeta potential measurements were utilized for membrane characterization. Membrane barrier and antifouling properties were evaluated in ultrafiltration of model solutions containing human serum albumin and humic acids as well as with real surface water. PASA addition was found to affect the kinetics of phase separation leading to delayed demixing mechanism of phase separation due to the substantial increase of coagulant viscosity, which is proved by a large increase of membrane formation time. Denser and thicker skin layer is formed and formation of macrovoids in membrane matrix is suppressed. FTIR analysis confirms the immobilization of PASA macromolecules into the membrane skin layer, which yields improvement of hydrophilicity and change of zeta potential. Modified membrane demonstrated better separation and antifouling performance in the ultrafiltration of humic acid solution and surface water compared to the reference membrane.

show abstract

Section: Introductionmentioning

confidence: 99%

Modification of Polysulfone Ultrafiltration Membranes via Addition of Anionic Polyelectrolyte Based on Acrylamide and Sodium Acrylate to the Coagulation Bath to Improve Antifouling Performance in Water Treatment

et al. 2020

View full text Add to dashboard Cite

show abstract

“…However, little is known for such membranes with respect to acid resistance, acid permeability and impurity rejection. In the two previous studies carried out by us we successfully showed that LbL membranes outperform commercial membranes in terms of permeability and P recovery from an acidic environment [12,23]. It was shown that over 80% permeate recovery can be reached by filtrating with 10% phosphoric acid, while constantly achieving less than 20% P retention.…”

Section: Introductionmentioning

confidence: 78%

“…Currently, such a membrane is commercially not available. This problem can be overcome by modifying membranes using polyelectrolyte (PE) layer-by-layer (LbL) deposition, creating NF membranes with tailor-made characteristics [12][13][14][15][16][17][18][19][20][21][22]. LbL membranes are fabricated by depositing oppositely charged PE on an also charged support material, in general a porous ultrafiltration (UF) membrane.…”

Section: Introductionmentioning

confidence: 99%

“…Due to the high fluxes, this novel technique was successfully applied, overcoming the above mentioned drawbacks (low flux, low P-yield) of commercially available membranes [12,23]. In addition, LbL assembly gives the membrane tailored properties such as charge, hydrophilicity, chemical resistance, high flux, resistance to fouling and therefore an overall improvement of the separation process.…”

Section: Introductionmentioning

confidence: 99%

“…Hence, it was possible to reach at least 75% P recovery. This recovery rate was achieved using a PES(PDAMAC/PSS) 6 membrane [12]. However, these studies do not describe the impact of phosphoric acid on the stability of the membrane.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Assessment of Layer-By-Layer Modified Nanofiltration Membrane Stability in Phosphoric Acid

et al. 2020

Self Cite

View full text Add to dashboard Cite

Nanofiltration (NF) can enable P recovery from waste streams via retaining multivalent impurities from spent pickling acid. However, with the currently available membranes, an economically feasible process is impossible. Layer-by-layer modified NF membranes are a promising solution for the recovery of P from acidic leachate. LbL membranes show a high level of versatility in terms of fine tuning for ion retention, which is necessary to achieve sufficient phosphorus yields. However, the stability of layer-by-layer modified membranes during phosphoric acid (H3PO4) filtration needs to be further investigated. In our study, we show that a polyethersulfone hollow fiber membrane modified with four or eight bi-layers was stable during immersing and filtering of a 15% H3PO4 solution. A sulfonated polyethersulfone (sPES)-based hollow fiber LbL membrane was only stable during filtration. Thus, we show the importance of applying real process conditions to evaluate membranes. Another important aspect is the influence of the high ionic strength of the feed solution on the membrane. We show that a high ionic strength led to a decrease in Mg retention, which could be increased to 85% by adjusting the process parameters.

show abstract

Valorization of soybean oil residue through advanced technology of graphene oxide modified membranes for tocopherol recovery

et al. 2022

View full text Add to dashboard Cite

Soybean oil deodourization distillate (SODD) is a source of tocopherols used to produce vitamin E, in which α‐tocopherol is the isomer with higher biological activity and value‐added for the food industry. Hence, the aim of the present study was to modify the membrane surface with sulphonic groups, polyethyleneimine, and graphene oxide nanoparticles functionalized with tannic acid to recover SODD α‐tocopherol. First, the SODD saponification step was conducted followed by a liquid–liquid separation, which performed a pre‐concentration of α‐tocopherol approximately 28 times. The unsaponifiable material was dried and diluted in hexane, obtaining the feed solution for the membrane filtration processes. HPLC‐UV/DAD analysis showed that the modified membrane containing 1.12 mg of graphene oxide and 4.50 mg of tannic acid (M3) allowed to recover 82.00% of α‐tocopherol in the concentrate (14.16 wt.% of α‐tocopherol). From the characterizations of the modified membrane, it was observed that M3 presented hydrophobic properties and was able to be reused in two filtration cycles with a 64.39% flow recovery rate and a 71.96% recovery of α‐tocopherol. The results showed that the membrane modification with graphene oxide is a compelling methodology with low energy consumption and is eco‐friendly for the recovery and purification of α‐tocopherol from SODD.

show abstract

Phosphorus recovery in an acidic environment using layer-by-layer modified membranes

Cited by 47 publications

References 43 publications

Modification of Polysulfone Ultrafiltration Membranes via Addition of Anionic Polyelectrolyte Based on Acrylamide and Sodium Acrylate to the Coagulation Bath to Improve Antifouling Performance in Water Treatment

Modification of Polysulfone Ultrafiltration Membranes via Addition of Anionic Polyelectrolyte Based on Acrylamide and Sodium Acrylate to the Coagulation Bath to Improve Antifouling Performance in Water Treatment

Assessment of Layer-By-Layer Modified Nanofiltration Membrane Stability in Phosphoric Acid

Valorization of soybean oil residue through advanced technology of graphene oxide modified membranes for tocopherol recovery

Contact Info

Product

Resources

About