Enhanced removal efficiency of heavy metal ions by assembling phytic acid on polyamide nanofiltration membrane

Zhang, Hongli; Zhu, Shilin; Yang, Jie; Ma, Aibin; Chen, Weixing

doi:10.1016/j.memsci.2021.119591

Cited by 64 publications

(19 citation statements)

References 41 publications

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“…To confirm the synthesis of polyimides (OM, FM) and sulfonated copolyimides (OBM, FBM), FTIR spectra were collected as shown in Figure 1 26,34,35 These results provide convincing evidence of the successful formation of polyimides and sulfonated copolyimides.…”

Section: Ftir Studiesmentioning

confidence: 86%

“…The hydrophilic sulfonic acid group, an anionic functional group, exhibits strong affinity toward heavy metal ions. 26 Improvement in polymer hydrophilicity enhances the heavy metal ion adsorption capacity due to the feasible access to adsorption sites. Hence, sulfonated polyimides are of immense interest in research for exploiting their possible applications in the removal of toxic metal ions from water.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis of Sulfonated Copolyimides by Thermal Imidization for Efficient Lead Ion Adsorption from Aqueous Media

Manzoor

Kalsoom

Khan

et al. 2022

ACS Appl. Polym. Mater.

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Thermally stable, high performance sulfonated copolyimide adsorbents [OBM (ODPA+BDSA•TEA+MDA) and FBM (6FDA+BDSA•TEA+MDA)] having excellent adsorption ability were prepared via a two-step thermal imidization reaction. By the introduction of hydrophilic sulfonic acid groups into the polyimide backbone, the material's hydrophilicity was improved. The anionic sulfonate group bears strong affinity toward heavy metal ions. Improvement in polymer hydrophilicity enhances the heavy metal ion adsorption capacity due to feasible access to adsorption sites. Atomic absorption spectroscopy (AAS) was employed for heavy metal ion adsorption studies. In addition, quantum chemistry calculations using Molecular Operating Environment (MOE) software were performed, to scrutinize the experimental results for molecular surface studies. A good correlation was observed between computational and experimental findings. OBM was demonstrated to be more effective for Pb(II) removal from aqueous media with a higher q e and percent removal as compared to FBM. The synthesized sulfonated copolyimides are potential adsorbents for heavy metal ions.

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Section: Ftir Studiesmentioning

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Synthesis of Sulfonated Copolyimides by Thermal Imidization for Efficient Lead Ion Adsorption from Aqueous Media

Manzoor

Kalsoom

Khan

et al. 2022

ACS Appl. Polym. Mater.

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“…The following are available online at https://www.mdpi.com/article/ 10.3390/membranes11110809/s1, Figure S1 S1: Comparisons of different nanofiltration membranes in water permeance and rejection rates for the ions (Co 2+ , Zn 2+ , Ni 2+ , and the typical divalent ion) in the literature. References [43][44][45][46][47][48][49][50][51][52] have been cited in Supplementary Materials.…”

Section: Supplementary Materialsmentioning

confidence: 99%

Ultrahigh Water Permeance of Reduced Graphene Oxide Membrane for Radioactive Liquid Waste Treatment

Xia

Zhou

et al. 2021

Membranes

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Membrane methods exhibit great potential for application in radioactive liquid waste treatment. In this work, we prepared a reduced graphene oxide using the amino-hydrothermal method (AH-rGO) that exhibited effective rejection rates of 99.9% for CoCl2, ZnCl2, NiCl2, and radionuclide 60Co solutions with an ultrahigh water permeance of >71.9 L m−2 h−1 bar−1. The thickness of the AH-rGO membranes affects the water permeance, as the membrane with a thickness of ≈250 nm has the highest water permeance of up to 125.1 L m−2 h−1 bar−1 with the corresponding rejection rate of 86.8%. Importantly, this is the most permeable membrane with a satisfactory level of the rejection rate for typical radioactive ions of Co2+, Zn2+, and Ni2+. Moreover, the AH-rGO membranes presented excellent stability. These findings demonstrate the potential of reduced graphene oxide (rGO) membranes for radioactive liquid waste treatment.

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“…Compared to the traditional water treatments techniques, such as distillation, extraction, electrochemical treatment, ion exchange, and adsorption, the emerging membrane separation process several merits: high removal efficiency, low economic and energy cost, smaller footprint size, chemical residual elimination, easy scalability, and environmental friendliness [ 5 , 6 , 7 , 8 ]. Reverse osmosis (RO) and nanofiltration (NF) are common membrane separation techniques for drinking water and wastewater treatments.…”

Section: Introductionmentioning

confidence: 99%

Advancing Strategies of Biofouling Control in Water-Treated Polymeric Membranes

et al. 2022

Self Cite

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Polymeric membranes, such as polyamide thin film composite membranes, have gained increasing popularity in wastewater treatment, seawater desalination, as well as the purification and concentration of chemicals for their high salt-rejection and water flux properties. Membrane biofouling originates from the attachment or deposition of organic macromolecules/microorganisms and leads to an increased operating pressure and shortened service life and has greatly limited the application of polymeric membranes. Over the past few years, numerous strategies and materials were developed with the aim to control membrane biofouling. In this review, the formation process, influence factors, and consequences of membrane biofouling are systematically summarized. Additionally, the specific strategies for mitigating membrane biofouling including anchoring of hydrophilic monomers, the incorporation of inorganic antimicrobial nanoparticles, coating/grafting of cationic bactericidal polymers, and the design of multifunctional material integrated multiple anti-biofouling mechanisms, are highlighted. Finally, perspectives on the challenges and opportunities in anti-biofouling polymeric membranes are shared, shedding light on the development of even better anti-biofouling materials in near future.

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Enhanced removal efficiency of heavy metal ions by assembling phytic acid on polyamide nanofiltration membrane

Cited by 64 publications

References 41 publications

Synthesis of Sulfonated Copolyimides by Thermal Imidization for Efficient Lead Ion Adsorption from Aqueous Media

Synthesis of Sulfonated Copolyimides by Thermal Imidization for Efficient Lead Ion Adsorption from Aqueous Media

Ultrahigh Water Permeance of Reduced Graphene Oxide Membrane for Radioactive Liquid Waste Treatment

Advancing Strategies of Biofouling Control in Water-Treated Polymeric Membranes

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