Positively charged PVC ultrafiltration membrane via micellar enhanced ultrafiltration for removing trace heavy metal cations

Yang, Qian; Xie, Yan-Xin; Zhu, Bao-Ku; Zeng, Yan; Zhou, Haiyang; Ai, Panpan; Chen, Gairong

doi:10.1016/j.jwpe.2021.102552

Cited by 13 publications

(5 citation statements)

References 49 publications

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“…The disparity in the ratio (monomer/micelle) may be the primary factor contributing to the contradictory result. Interestingly, contrary to previous studies, , the suitable addition of surfactants increased the water permeability and hydrophilia of fouled membranes (Figure S3). This phenomenon can be explained by several processes.…”

Section: Resultscontrasting

confidence: 99%

“…In recent years, membrane technology has significantly contributed to sewage treatment, seawater desalination, drinking water production, and recycled water reuse and is acknowledged as a reliable and environmentally sustainable treatment process. , Despite its successes, membrane technology faces challenges in effectively rejecting heavy metals. Ultrafiltration (UF) and even nanofiltration (NF) membranes encounter obstacles in rejecting heavy metal ions (e.g., Cu 2+ , Ni 2+ , and Cd 2+ ) due to their small hydration radii, typically less than 3 Å. , Micellar-enhanced ultrafiltration (MEUF) has been developed and applied, and its effectiveness in removing heavy metals has been confirmed in several studies. , MEUF involves adding surfactants at concentrations reaching the critical micelle concentration (CMC) to heavy metal wastewater .…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanistic Insights into Micelle-Enhanced Nanofiltration for Heavy Metal Removal: Transformation of Ion Transport and Fouling Phenomena

Mao,

Cai,

et al. 2024

Environ. Sci. Technol.

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Toxic heavy metals are widely present in typical scenarios, such as mines and electroplating wastewater, presenting significant risks to biological and environmental safety. Membrane processes encounter a challenge in effectively intercepting heavy metals due to their small hydration radius. This research showcases the high efficiency of micelleenhanced nanofiltration (MENF) in removing heavy metals. At the critical micelle concentration, sodium dodecyl sulfate demonstrated a high removal of Cu 2+ , Ni 2+ , Zn 2+ , and Cd 2+ while maintaining substantial potential for complexation of heavy metals. The formation of micelles and the bonding of heavy metals with surfactants bolstered the resistance of heavy metal ions to transmembrane transport. The presence of heavy metals in ionic form in wastewater facilitated their complexation with surfactants or micelles. Notably, the valence state and concentration of interfering ions in the environment could slightly influence the removal of heavy metals by MENF. Additionally, MENF displayed remarkable antifouling properties. The loose gel layer created by surfactant molecules and the micelle enhanced the membrane permeability and reduced the scaling tendency of heavy metals. This study contributes to an improved understanding of the mechanisms involved in heavy metal rejection by using MENF.

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Section: Resultscontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanistic Insights into Micelle-Enhanced Nanofiltration for Heavy Metal Removal: Transformation of Ion Transport and Fouling Phenomena

Mao,

Cai,

et al. 2024

Environ. Sci. Technol.

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“…The hydrophilicity of these nanoparticles is caused by the presence of the hydroxyl functional group on their surface, which causes the penetration speed. During the separation process, the water molecules in the coagulation bath moved into the casting solution, which resulted in the formation of larger pores, the development of finger-and sponge-like structures, and alterations to the size and structure of macropores [49,50]. The EDX evaluation of the surface and cross section of the PVC/CuO nanocomposite membrane is illustrated in Fig.…”

Section: Membrane Morphologiesmentioning

confidence: 99%

Effect of Copper Oxide Nanoparticles on the Performance of Polyvinyl Chloride Membranes

Khezraqa,

Samiei,

Etemadi

et al. 2023

Chem Eng & Technol

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Polyvinyl chloride (PVC)/copper oxide (CuO) nanocomposite membranes were fabricated at different CuO nanoparticles loading levels using the phase inversion method. The fabricated membranes were tested through two filtration cycles in a submerged membrane system to remove bovine serum albumin (BSA) from water. Results showed that the hydrophilicity and porosity of the nanocomposite membranes were enhanced with an increase of CuO nanoparticles loading. The field emission electron microscopy images from the membrane surface demonstrated that the number and size of pores increased with addition of CuO nanoparticles. The atomic force microscopy test displayed that all nanocomposite membranes showed lower surface roughness in comparison to neat PVC membranes. The obtained results from membrane performance indicated that the irreversible fouling ratio for neat PVC membranes in the first and second cycles of filtration decreased for PVC/CuO‐1.5 membranes. Compared with the neat PVC membrane, the membrane containing CuO exhibited better capabilities such as the enhanced permeation flux, higher BSA rejection rate, and better antifouling properties.

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“…To this end, poly (methyl methacrylate-co-dimethylaminoethyl methacrylate) (PMD) was used along with PVC. This hybrid membrane largely removed traces of heavy metal ions [177]. Other studies reported that regenerated cellulose grafted with glycidyl methacrylate (GMA) and functionalized with imidazole groups (cellulose-g-GMA-imidazole) revealed adsorbent efficiency for Pb and Ni ions [129].…”

Section: Chemical Modification With the Aim Of Attaining Improved Pro...mentioning

confidence: 99%

Polymer Membranes as Innovative Means of Quality Restoring for Wastewater Bearing Heavy Metals

et al. 2022

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The problem that has aroused the interest of this review refers to the harmful effect of heavy metals on water sources due to industrial development. In this respect, the review is aimed at achieving a literature survey on the outstanding results and advancements in membranes and membrane technologies for the advanced treatment of heavy metal-loaded wastewaters. Particular attention is given to synthetic polymer membranes, for which the proper choice of precursor material can provide cost benefits while ensuring good decontamination activity. Furthermore, it was also found that better removal efficiencies of heavy metals are achieved by combining the membrane properties with the adsorption properties of inorganic powders. The membrane processes of interest from the perspective of industrial applications are also discussed. A noteworthy conclusion is the fact that the main differences between membranes, which refer mainly to the definition and density of the pore structure, are the prime factors that affect the separation process of heavy metals. Literature studies reveal that applying UF/MF approaches prior to RO leads to a better purification performance.

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Positively charged PVC ultrafiltration membrane via micellar enhanced ultrafiltration for removing trace heavy metal cations

Cited by 13 publications

References 49 publications

Mechanistic Insights into Micelle-Enhanced Nanofiltration for Heavy Metal Removal: Transformation of Ion Transport and Fouling Phenomena

Mechanistic Insights into Micelle-Enhanced Nanofiltration for Heavy Metal Removal: Transformation of Ion Transport and Fouling Phenomena

Effect of Copper Oxide Nanoparticles on the Performance of Polyvinyl Chloride Membranes

Polymer Membranes as Innovative Means of Quality Restoring for Wastewater Bearing Heavy Metals

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