Multilayer UF membrane assisted by photocatalytic NZVI@TiO2 nanoparticle for removal and reduction of hexavalent chromium

Kazemi, Maryamossadat; Peyravi, Majid; Jahanshahi, Mohsen

doi:10.1016/j.jwpe.2020.101183

Cited by 22 publications

(3 citation statements)

References 58 publications

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“…The use of various nanomaterials such as graphene oxide (GO), carbon nanotubes (CNTs), porous frameworks and metal oxides has offered new insights for fabricating advanced membranes for water purification (Jun et al 2020;Lau et al 2015;Wu et al 2020). Among the various available nanomaterials, fabrication of membranes with titanium dioxide (TiO 2 ) has received great attention for fabricating NF, RO and distillation membranes because of its functional properties like physical and chemical stability, low toxicity, wide availability, toughness, photocatalytic activity, flexibility, hydrophilicity, anti-fouling and salt rejection (Bahamonde Soria et al 2020;Kazemi et al 2020;Lu et al 2020). However, by comparing TiO 2 with other nanomaterials such as graphene and GO, graphene is not a hydrophilic material, whereas TiO 2 is hydrophilic in nature, which enables greater water permeability and ultrahigh permeation flux.…”

Section: Introductionmentioning

confidence: 99%

Development of CA-TiO2-incorporated thin-film nanocomposite forward osmosis membrane for enhanced water flux and salt rejection

Jain

Verma

Dhupper

et al. 2021

Int. J. Environ. Sci. Technol.

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Low access to electricity is a significant problem in small and distant areas, where power intensive treatment systems like reverse osmosis can complicate handling requirements. In order to mitigate the energy requirements in such areas, forward osmosis (FO) is an advance option to desalinate and provide potable water cost effectively. In this study, cellulose acetate (CA) was selected as cheap natural green polymer along with nanoscale titanium dioxide (TiO 2 ) particles with different loadings (0.5, 1, 1.5 wt.%) and polyvinyl pyrrolidone (PVP) as a binder to fabricate thin-film nanocomposite (TFNC) FO membranes. Various characterization techniques including XRD, EDS and SEM confirmed the capability of the developed membranes. The results convey that the use of titanium nanoparticles enhanced the membrane's surface morphology resulting in smaller pore sizes, stable water flux, low reverse salt flux and higher salt rejection. The pure water flux of the nanocomposite membranes was dramatically increased compared with that of commercial and control CA membrane. The TFNC CA-TiO 2 -1 (with 1% TiO 2 loading) was the finest membrane with an average water flux of about 58.21 (L/m 2 .h), reverse salt flux of 16.28 (g/m 2 .h) along with 92.6% salt rejection with 1 M NaCl as draw solution (DS). This work revealed that the membranes fabricated in this study are competitive with the current FO membranes. More importantly, they are anticipated to enable the use of energy-efficient and cost-effective FO-based desalination and would help to overcome global water scarcity and provide potable water to remote locations.

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Section: Introductionmentioning

confidence: 99%

Development of CA-TiO2-incorporated thin-film nanocomposite forward osmosis membrane for enhanced water flux and salt rejection

Jain

Verma

Dhupper

et al. 2021

Int. J. Environ. Sci. Technol.

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“…54 A photocatalytic TFC membrane was modified by a layer of CS as an adsorbent and then coated with a layer of zerovalent iron@titanium dioxide (nZVI@TiO 2 ) nanoparticles via layer-by-layer technology. 116 The presence of the nanofillers improved the hydrophilicity of the membrane and consequently, flux up to 39.7 LMH was achieved. The presence of an additional layer of CS and nZVI@TiO 2 nanoparticles on the TFC membrane caused more resistance to Cr( vi ) ions' penetration into the membrane, causing a significantly higher rejection (97.63%).…”

Section: Performance Of Surface-modified Uf and Nf Membranes For Cont...mentioning

confidence: 96%

Surface-modified ultrafiltration and nanofiltration membranes for the selective removal of heavy metals and inorganic groundwater contaminants: a review

Koli,

Singh

2023

Environ. Sci.: Water Res. Technol.

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“…The toxicity of Cr(VI) is much higher than that of Cr(III) since Cr(III) complexes cannot permeate cytomembranes, whereas Cr(VI) can enter the human body via the digestive system, respiratory tract, skin, or mucosa 1,2 . Currently, methods for treating Cr(VI)‐containing wastewater have been developed, including reduction‐precipitation, 3 electrolysis, 4 ion exchange, 5 membrane separation, 6 and adsorption 7 . Among them, the adsorption method has long been a research hotspot in Cr(VI)‐containing wastewater treatment, due to its remarkable features such as easy operation, moderate treatment conditions, simple equipment, and low energy consumption 7–9 …”

Section: Introductionmentioning

confidence: 99%

Preparation of a cationic hydrogel microsphere adsorbent for efficient removal of hexavalent chromium from aqueous solution

Ye,

Zhang,

et al. 2024

J of Applied Polymer Sci

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Herein, a cationic hydrogel microsphere (CHMS) was prepared by inverse suspension polymerization and freeze‐drying and was applied to the adsorptive removal of hexavalent chromium (Cr(VI)) from aqueous solution. Morphological characterization shows that there are lots of folds and pores on the surface of CHMS with a unique petal‐like appearance. According to the chemical structure analysis, CHMS contains plenty of functional groups such as amine and hydroxyl groups. These features give CHMS a larger specific surface area, faster adsorption rate, and higher adsorption capacity than the conventional cationic hydrogel microparticle (CHMP) adsorbent. The adsorption of Cr(VI) in water by CHMS is mainly based on the combination of electrostatic adsorption and redox reaction, with the electrostatic interaction between the protonated amine and Cr(VI) serving as the predominant adsorption mechanism. Experimental results reveal that CHMS can efficiently remove Cr(VI) from simulated wastewater in both batch and continuous adsorption modes, which is primarily due to its distinctive surface morphology and rich functional groups. Furthermore, the common coexisting metal ions in Cr(VI)‐containing wastewater have no substantial negative influence on the adsorption. Therefore, it can be concluded that CHMS has a promising application prospect in the treatment of Cr(VI)‐containing wastewater.

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Multilayer UF membrane assisted by photocatalytic NZVI@TiO2 nanoparticle for removal and reduction of hexavalent chromium

Cited by 22 publications

References 58 publications

Development of CA-TiO2-incorporated thin-film nanocomposite forward osmosis membrane for enhanced water flux and salt rejection

Development of CA-TiO2-incorporated thin-film nanocomposite forward osmosis membrane for enhanced water flux and salt rejection

Surface-modified ultrafiltration and nanofiltration membranes for the selective removal of heavy metals and inorganic groundwater contaminants: a review

Preparation of a cationic hydrogel microsphere adsorbent for efficient removal of hexavalent chromium from aqueous solution

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