Hierarchical nanostructures as novel antifouling agents in nanofiltration process

Jahangiri, Hasan; lehi, Arash Yunessnia; Akbari, Ahmad

doi:10.1016/j.desal.2015.08.003

Cited by 20 publications

(4 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…19,20 Recently, the hierarchical Mg(OH) 2 nanostructures modified by branched poly(ethylenimine) was produced on the nanofiltration membrane with positive charges, leading to 95% of the flux recovery ratio and 5.11% total fouling ratio. 21 These results indicated that the antifouling performance can be effectively altered/modified by incorporation of hierarchical inorganic nanocomponents into membrane surfaces.…”

Section: Introductionmentioning

confidence: 87%

“…As regards to the aqueous nanofiltration membrane, endowing membrane surfaces hydrophilicity is the most common strategy to enhance antifouling property. The hydrophilic functional groups, such as polyelectrolyte and zwitterionic polymers, as well as poly(ethylene oxide) segments and poly(vinyl alcohol) polymer have been introduced into polyamide layer of nanofiltration membranes for improvement of fouling resistance. − And the antifouling effects can be also achieved by embedding or incorporating inorganic components, such as multiwalled carbon nanotube and graphene oxide/TiO 2 nanocomposite, into the active layer of thin film nanocomposite nanofiltration (TFN-NF) membrane. , Recently, the hierarchical Mg(OH) 2 nanostructures modified by branched poly(ethylenimine) was produced on the nanofiltration membrane with positive charges, leading to 95% of the flux recovery ratio and 5.11% total fouling ratio . These results indicated that the antifouling performance can be effectively altered/modified by incorporation of hierarchical inorganic nanocomponents into membrane surfaces.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

One-Step Transformation from Hierarchical-Structured Superhydrophilic NF Membrane into Superhydrophobic OSN Membrane with Improved Antifouling Effect

Guo

Qin

et al. 2016

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

The hierarchical-structured superhydrophilic poly(ethylenimine)/poly(acrylic acid) (PEI/PAA)calcium silicate hydrate (CSH) multilayered membranes (PEI/PAA-CSH)n were prepared as aqueous nanofiltration (NF) membrane, and then they were transformed into superhydrophobic organic solvent nanofiltration (OSN) membranes by one-step modification of trimethylperfluorinatedsilane (PFTS). Investigation on surface structures and properties of these multilayered membranes (PEI/PAA-CSH)n indicated that the hierarchical-structured (PEI/PAA-CSH)n multilayered membrane produced by in situ incorporation of CSH aggregates into PEI/PAA multilayers facilitated its one-step transformation from superhydrophilicity into superhydrophobicity. Both of the superwetting membranes showed better nanofiltration performances for retention of dyes of water and ethanol solution, respectively. Moreover, the long-term performance and antifouling behaviors, investigated by retention of methyl blue (MB), bovine serum albumin (BSA), and humic acid (HA) aqueous water solution and nonaqueous ethanol solution indicated that both of the superhydrophilic and superhydrophobic membrane showed higher stability and excellent antifouling property.

show abstract

Section: Introductionmentioning

confidence: 87%

Section: Introductionmentioning

confidence: 99%

One-Step Transformation from Hierarchical-Structured Superhydrophilic NF Membrane into Superhydrophobic OSN Membrane with Improved Antifouling Effect

Guo

Qin

et al. 2016

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

show abstract

“…The common base of the majority of these methods consists in the tendency to inhibit the interaction of deposited particles with the membrane . These methods can be grouped into three major approaches: hydrodynamic manipulations, surface modification, and regular cleaning . Among these methods, surface modification is most prevalent.…”

Section: Introductionmentioning

confidence: 99%

Novel ultrafiltration membranes with the least fouling properties for the treatment of veterinary antibiotics in the pharmaceutical wastewater

Bojaran

Akbari

lehi

2019

Polymers for Advanced Techs

Self Cite

View full text Add to dashboard Cite

Dendrimers have received more attention in all fields of research these days. In the present study, polyamidoamine (PAMAM) dendrimers were synthesized on the acrylic ultrafiltration membranes to minimize fouling as an important deficiency in the separation process. The antifouling activity of these dendrimers with different generations (G0‐3) was tested to restrict three macrolides (tylvalosin, tylosin, and tulathromycin) and two pleuromutilins (tiamulin and valnemulin) as veterinary antibiotic drugs with amine groups and positive charges at pH = 7 of the membrane surface. These compounds are risky for human consumption. Due to having several amine functional groups and branches, PAMAM dendrimers can be a great coating agent for antifouling. G3 PAMAM dendrimer‐coated membranes had the best performance (water flux: 130.7 L/m2·h, rejection of tulathromycin: 91.4%, flux recovery ratio: 86.3%). The function of this ultrafiltration process depended on pore size and also charge surface. A significant reduction for irreversible and reversible fouling was observed for this new ultrafiltration membrane (Fir: 14.5%, Fre: 21.9%). This observation was confirmed by the power law model. Three 5‐hour cycle ultrafiltration processes were carried out for veterinary antibiotic wastewater that showed 3.18% loss of initial water flux (for the third cycle), final cleaning efficiency of 96.82%, and tylvalosin rejection of 94.1%.

show abstract

“…Membrane filtration is regarded as an eco‐friendly and cost‐effective approach for water and wastewater treatment in comparison with the conventional methods, eg, floatation, adsorption, and flocculation . There are several kinds of membrane processes that are among the most effective strategies to achieve high removal of both traditional and emerging contaminants from water . All these processes require the use of semipermeable membranes, the market of which has been dominated for decades by thin‐film composite (TFC) membranes due to their salient advantages such as good separation capability and wide pH tolerance …”

Section: Introductionmentioning

confidence: 99%

Thin‐film composite membranes incorporated with large‐area graphene oxide sheets and adjustable surface charges

lehi

Akbari

2017

Polymers for Advanced Techs

Self Cite

View full text Add to dashboard Cite

In this research, composite membranes were prepared by cross-linking of poly(vinyl alcohol) (PVA) and glutaraldehyde (GA) on amidoximated ultrafiltration membrane. During this procedure, it was taken advantage of large-area graphene oxide sheets as graphitic nets in the active layer. These membranes were used to remove an industrial textile dye (Chrysophenine GX) from wastewater. Optimum condition for membrane preparation was 1.5% wt. of PVA, 1.5% wt. of GA, and 0.3% wt. of graphene oxide sheets. Permeation results showed that electrostatic charges on membrane surface have easily converted from positive into negative ones. Contact angle was significantly decreased (63.5°to 28.8°). Final nanofiltration membrane showed lowest fouling rate during removing the industrial direct dye (flux recovery ratio: 96.60%, reversible fouling ratio: 23.82%, and irreversible fouling ratio: 3.39%). Pore size of this membrane was <8 nm, and Chrysophenine GX was eliminated by 98.5% with water permeability of 12.23 L/m 2 .h.bar.

show abstract

Hierarchical nanostructures as novel antifouling agents in nanofiltration process

Cited by 20 publications

References 16 publications

One-Step Transformation from Hierarchical-Structured Superhydrophilic NF Membrane into Superhydrophobic OSN Membrane with Improved Antifouling Effect

One-Step Transformation from Hierarchical-Structured Superhydrophilic NF Membrane into Superhydrophobic OSN Membrane with Improved Antifouling Effect

Novel ultrafiltration membranes with the least fouling properties for the treatment of veterinary antibiotics in the pharmaceutical wastewater

Thin‐film composite membranes incorporated with large‐area graphene oxide sheets and adjustable surface charges

Contact Info

Product

Resources

About