Fabrication of thin film nanocomposite nanofiltration membrane incorporated with cellulose nanocrystals for removal of Cu(II) and Pb(II)

Hoang, Minh Trang; Pham, Tien Duc; Verheyen, Dries; Khai, Nguyen Manh; Phạm, Tiến Sơn; Zhu, Junyong; Bruggen, Bart Van der

doi:10.1016/j.ces.2020.115998

Cited by 76 publications

(18 citation statements)

References 38 publications

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“…The NF membrane from surfactant-assembly regulated interfacial polymerization (SARIP) shows a high rejection of 98.8% to MgCl2. As using such a membrane for removing other metal ions, such as CdCl2, CoCl2 and NiCl2, extreme high rejection up to 98% without sacrifice of permeating flux is also achieved, showing an overall performance superior to NF membranes reported in other literature [4,17,27,30,[38][39][40][41][42][43][44][45] . water was produced by a Milli-Q water purification system and utilized during all the experiments in this paper.…”

Section: Introductionmentioning

confidence: 83%

Polyamide Nanofiltration Membrane from Surfactant-assembly Regulated Interfacial Polymerization of 2-Methylpiperazine for Divalent Cations Removal

Gong

Zhu

Dong

et al. 2021

Chem. Res. Chin. Univ.

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emoval of metal ions from water can not only alleviate the scaling problem of domestic and industrial water, but also solve the water safety problem caused by heavy metal ion pollution. Here, we fabricate a positively charged nanofiltration membrane via surfactant-assembly regulated interfacial polymerization(SARIP) of 2-methylpiperazine(MPIP) and trimesoyl chloride(TMC). Due to the existence of methyl substituent, MPIP has lower reactive activity than piperazine(PIP) but stronger affinity to hexane, resulting in a nanofiltration(NF) membrane with an opposite surface charge and a loose polyamide active layer. Interestingly, with the help of sodium dodecyl sulfate(SDS) assembly at the water/hexane, the reactivity between MPIP and TMC was obviously increased and caused in turn the formation of a positively charged polyamide active layer with a smaller pore size, as well as with a narrower pore size distribution. The resulting membrane shows a highly efficient removal of divalent cations from water, of which the rejections of MgCl2, CoCl 2 and NiCl 2 are higher than 98.8%, 98.0% and 98.0%, respectively, which are better than those of most of other positively charged NF membranes reported in literatures.

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Section: Introductionmentioning

confidence: 83%

Polyamide Nanofiltration Membrane from Surfactant-assembly Regulated Interfacial Polymerization of 2-Methylpiperazine for Divalent Cations Removal

Gong

Zhu

Dong

et al. 2021

Chem. Res. Chin. Univ.

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“…The devices are easy to operate and consumed energy is mainly spent on creating high pressure over the solution. Disadvantages include the occurrence of the phenomenon of concentration polarization, which leads to a deterioration in the characteristics of membrane devices and the need for preliminary preparation of solutions [43][44][45][46][47][48][49][50][51][52][53].…”

Section: Analysis Of Previous Studiesmentioning

confidence: 99%

Optimization of dose calculation of modified magnetite during sorption purification of water from copper ions to create environmentally friendly technology

et al. 2021

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Due to the growth of man-caused pollution, there is a need to use modern methods of water purification. It is advisable to use sorption methods for the extraction of heavy metals, which are considered to be particularly dangerous. It is established that sorbents based on magnetite are quite effective in the extraction of copper ions. It is shown that the sorption capacity of magnetite-based sorbents towards copper ions depends on the ratio of concentrations of Fe2+ and Fe3+ ions in the reaction mixture, and increases with increasing this indicator from 1/2 to 2. The sorption capacity of the sorbent towards copper ions increases by 4.4 times. It is shown that the efficiency of copper ions removal onto magnetite increases for sorbent modified with sodium sulfide. The proposed scheme provides the possibility of sorption treatment of large volumes of water from copper ions to the norms for the discharge of wastewater into fishery reservoirs. Post-productional magnetite is dehydrated and supplied to metallurgical enterprises for processing. The developed technology of water purification from copper ions is environmentally safe and energy efficient.

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“…The isoelectric point (pI) of gelatin solution occurred at around pH 6, at which a pHz = 0. Gelatin has the ability to present different charges depending on the pH [8]. At pH < pI, the gelatin solution showed a net positive charge, which was attributed to the protonation of the amino groups, while at pH > pI the gelatin solution showed a net negative charge, due to ionization of the carboxyl groups.…”

Section: Physical and Rheological Properties Of Gelatin-cellulose Nanocrystals Hydrogel Membranementioning

confidence: 99%

“…Gelatin films present moisture-sensitive and exhibit low water vapor barrier and mechanical resistance under high relative humidity due to the hydrophilicity of the polypeptide chains [7]. Cellulose nanocrystals (CNCs) were used to overcome these limitations due to their hydrophilic, renewable and non-toxic characteristic [8]. Several researchers have described a joint synergistic effect between gelatin and CNCs toward the formation of percolated networks stabilized by hydrogen bonding.…”

Section: Introductionmentioning

confidence: 99%

Neural Network for Modeling the Mechanical Properties of Gelatin-Cellulose Nanocrystals Hydrogel Membrane for Heavy Metal ions Removal from Wastewater

Kabuba

2021

MATEC Web Conf.

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The mechanical properties of Gelatin-cellulose nanocrystals hydrogel membrane were investigated for the removal of heavy metal ions from wastewater. The membrane was characterized using Scanning Electron Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR) analysis. Neural Network (NN) model was developed to predict the mechanical properties such as Young’s modulus, tensile strength, and elongation. The NN predicted results are very close to the experimental results with R2 = 0.99315. The predicted values were found to be in excellent agreement with the experimental data and the current model has a good learning precision and generalization. The results revealed that the developed model is very accurate.

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Fabrication of thin film nanocomposite nanofiltration membrane incorporated with cellulose nanocrystals for removal of Cu(II) and Pb(II)

Cited by 76 publications

References 38 publications

Polyamide Nanofiltration Membrane from Surfactant-assembly Regulated Interfacial Polymerization of 2-Methylpiperazine for Divalent Cations Removal

Polyamide Nanofiltration Membrane from Surfactant-assembly Regulated Interfacial Polymerization of 2-Methylpiperazine for Divalent Cations Removal

Optimization of dose calculation of modified magnetite during sorption purification of water from copper ions to create environmentally friendly technology

Neural Network for Modeling the Mechanical Properties of Gelatin-Cellulose Nanocrystals Hydrogel Membrane for Heavy Metal ions Removal from Wastewater

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