Mechanisms of the removal of the metal ions, dyes, and drugs from wastewaters by the electrospun nanofiber membranes

Abadi, Parvaneh Ghaderi-Shekhi; Irani, Mohammad; Rad, Leila Roshanfekr

doi:10.1016/j.jtice.2022.104625

Cited by 15 publications

(3 citation statements)

References 316 publications

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“…( 6), ( 7), (8), and (9), respectively. [45] Langmuir (6) where q max (mg/g) corresponds to the maximum adsorption capacity, and K L (L/g) is the adsorption equilibrium constant. Freundlich (7) where K F (mg/g) is the adsorption equilibrium constant, and n corresponds to the number of active sites of nZVI/MCM-41/rGO required for one Ni(II) to adsorb.…”

Section: Adsorption Isothermmentioning

confidence: 99%

“…[2] The World Health Organization recommends that nickel concentration in water should be no more than 5 mg/L. [3] To remove heavy metals from contaminated water, a number of methods have been used, including resin adsorption, [4] ozonation, [5] membrane, [6] coagulationflocculation, [7] electrocoagulation, [8] electrodeposition, [9] ion exchange, [10] and microbial electrolysis cell. [11] However there are also problems, such as expensive costs, difficult working conditions, and environmental risks related to chemical use.…”

Section: Introductionmentioning

confidence: 99%

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Preparation of nZVI/MCM‐41/rGO for Adsorption of Nickel Ions from Water

Piao,

Peng,

Liu

et al. 2024

ChemistrySelect

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Emissions of nickel (Ni) are harmful to the environment and people‘s health. Although nano zero‐valent iron (nZVI) has a lot of potential for treating water pollution, its instability and tendency for aggregation have limited its application. In order to improve its properties, composite adsorbent MCM‐41/rGO supported nZVI (nZVI/MCM‐41/rGO) is designed for improving the properties of nZVI, and it is characterized by SEM, XRD, FTIR and BET. The results show that it has an apparent Fe(0) crystallinity and modest rGO crystallinity, as well as a rough and porous structure. There are many oxygen‐containing groups found on the surface of nZVI/MCM‐41/rGO, such as −OH, −COOH, and Si−O. The pore diameter is concentrated at 23.82 nm, and the specific surface area is 15.94 cm2/g. The consequences of several parameters such as contact time, initial metal ion concentration, adsorbent dosage, and pH for adsorption efficiency were investigated. The best performance is occurred at pH 6, C0=80 mg/L with a 2 g/L adsorbent dosage, and after 180 min, a maximum adsorption capacity of 41.82 mg/g is reached at 333 K. The Dubinin‐Radushkevich isotherm and second order kinetic models fit the Ni(II) adsorption process well. It is determined through analysis of the thermodynamic parameters that the adsorption progress is endothermic (ΔH0>0) and spontaneous (ΔG0<0). nZVI/MCM‐41/rGO has proven to be an effective and alternative material for the removal of Ni(II) ions from aqueous media due to its excellent removal ability, availability, and low cost.

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Section: Adsorption Isothermmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Preparation of nZVI/MCM‐41/rGO for Adsorption of Nickel Ions from Water

Piao,

Peng,

Liu

et al. 2024

ChemistrySelect

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“…Nanofiber membranes are widely used in protein adsorption and separation [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 ], wastewater treatment [ 9 , 10 , 11 , 12 , 13 ], and pharmaceutical and biomedicine applications [ 14 , 15 , 16 , 17 , 18 ]. Previous work found tris(hydroxymethyl)aminomethane affinity nanofiber membranes could be successfully applied to lysozyme recovery from chicken egg white in continuous flow systems [ 1 , 2 , 4 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Breakthrough Curve Modeling and Analysis for Lysozyme Adsorption by Tris(hydroxymethyl)aminomethane Affinity Nanofiber Membrane

Chen,

Lai,

Hanh

et al. 2023

Membranes

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In this study, a polyacrylonitrile nanofiber membrane was first hydrolyzed and then functionalized with tris(hydroxymethyl)aminomethane (P-Tris), then used as an affinity nanofiber membrane for lysozyme adsorption in membrane chromatography. The dynamic adsorption behavior of lysozyme was investigated in a flow system under various operating parameters, including adsorption pHs, initial feed lysozyme concentration, loading flow rate, and the number of stacked membrane layers. Four different kinetic models, pseudo-first-order, pseudo-second-order, Elovich, and intraparticle diffusion kinetic models, were applied to experimental data from breakthrough curves of lysozyme. The results showed that the dynamic adsorption results were fitted well with the pseudo-second-order kinetic model. The breakthrough curve experimental results show significant differences in the breakthrough time, the dynamic binding capacity, the length of the mass transfer zone, and the utilization rate of the membrane bed under different operating parameters. Four dynamic adsorption models (i.e., Bohart–Adams, Thomas, Yoon–Nelson, and BDST models) were used to analyze the breakthrough curve characteristics of the dynamic adsorption experiments. Among them, the Yoon–Nelson model was the best model to fit the breakthrough curve. However, some of the theoretical results based on the Thomas and Bohart–Adams model analyses of the breakthrough curve fit well with the experimental data, with an error percentage of <5%. The Bohart–Adams model has the largest difference from the experimental results; hence it is not suitable for breakthrough curve analysis. These results significantly impact dynamic kinetics studies and breakthrough curve characteristic analysis in membrane bed chromatography.

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