Preparation and properties of phosphinic acid–functionalized polyacrylonitrile hollow fiber membrane for heavy metal adsorption

Cheng, Zuxin; Zhang, Yuhan; Chen, Kai; Xiao, Kaijun; Yi, Yin

doi:10.1007/s11356-022-24201-3

Cited by 3 publications

(2 citation statements)

References 49 publications

(27 reference statements)

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“…These results showed that, as somewhat expected from Equation (15), the iron flux increased with the increase in the initial metal concentration in the feed phase [38].…”

Section: Influence Of the Initial Iron(iii) Concentration In The Feed...supporting

confidence: 78%

“…In the case of membrane technologies, supported liquid membranes both in flat-sheet or hollow fiber modules are gaining special consideration in the recovery of metals [ 15 , 16 , 17 , 18 ]. In the case of hollow fiber membrane processing, one of the more advanced developments is the so-called pseudo-emulsion-based hollow fiber strip dispersion (PEHFSD), which is characterised by its ability to afford high mass transfer rates of solutes and is accompanied by high selectivity by the use of specific carriers or extractants.…”

Section: Introductionmentioning

confidence: 99%

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Iron Control in Liquid Effluents: Pseudo-Emulsion Based Hollow Fiber Membrane with Strip Dispersion Technology with Pseudo-Protic Ionic Liquid (RNH3+HSO4−) as Mobile Carrier

Robla

2023

Membranes

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The transport of iron(III) from aqueous solutions through pseudo-emulsion-based hollow fiber with strip dispersion (PEHFSD) was investigated using a microporous hydrophobic hollow fiber membrane module. The pseudo-protic ionic liquid RNH3HSO4− dissolved in Solvesso 100 was used as the carrier phase. This pseudo-protic ionic liquid was generated by the reaction of the primary amine Primene JMT (RNH2) with sulphuric acid. The aqueous feed phase (3000 cm3) containing iron(III) was passed through the tube side of the fiber, and the pseudo-emulsion phase of the carrier phase (400 cm3) and sulphuric acid (400 cm3) were circulated through the shell side in counter-current operational mode, using a single hollow fiber module for non-dispersive extraction and stripping. In the operation, the stripping solution (sulphuric acid) was dispersed into the organic membrane phase in a tank with a mixing arrangement (a four-blade impeller stirrer) designed to provide strip dispersion. This dispersed phase was continuously circulated from the tank to the membrane module in order to provide a constant supply of the organic solution to the fiber pores. Different hydrodynamic and chemical parameters, such as feed (75–400 cm3/min) and pseudo-emulsion phases (50–100 cm3/min) flows, sulphuric acid concentration in the feed and stripping phases (0.01–0.5 M and 0.5–3 M, respectively), metal concentration (0.01–1 g/L) in the feed phase, and PPILL concentration (0.027–0.81 M) in the carrier phase, were investigated. From the experimental data, different diffusional parameters were estimated, concluding that the resistance due to the feed phase was not the rate-controlling step of the overall iron(III) transport process. It was possible to concentrate iron(III) in the strip phase using this smart PEHFSD technology.

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“…These results showed that, as somewhat expected from Equation (15), the iron flux increased with the increase in the initial metal concentration in the feed phase [38].…”

Section: Influence Of the Initial Iron(iii) Concentration In The Feed...supporting

confidence: 78%

Section: Introductionmentioning

confidence: 99%

Iron Control in Liquid Effluents: Pseudo-Emulsion Based Hollow Fiber Membrane with Strip Dispersion Technology with Pseudo-Protic Ionic Liquid (RNH3+HSO4−) as Mobile Carrier

Robla

2023

Membranes

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Progress in the preparation of phosphorus-containing polymers via phosphorus trichloride-free routes

Hong

Liu

Wang

et al. 2023

European Polymer Journal

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Modification of pre-oxidized polyacrylonitrile fibers as chelating sorbents for removal of Copper(II) ions

Wang,

Jiang

et al. 2023

Funct. Mater. Lett.

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Pre-oxidized polyacrylonitrile (PAN) fibers were chemically modified by sulfuric acid. In the process, conjugated imine sequences were retained and amide groups were transformed from unreacted nitrile groups. The adsorption experiments of Cu(II) ions by modified PAN fibers indicated that the adsorption capacities were significantly improved by increasing initial concentrations of metal ions, reaction time and temperature. The adsorption equilibriums followed Langmuir isotherm with correlation coefficients greater than 0.99. Kinetics analysis demonstrated that the adsorption of copper ions on the modified fiber was fitted well with pseudo-second-order kinetics equation. Indicated by energy dispersive X-ray (EDX) and X-ray photoelectron spectroscopy (XPS) results, channels for metal ions diffusing from the surface to the inner of the fiber were generated by the strong etching of sulfuric acid. The active sites of conjugated imine sequences and amides in the whole modified fiber can thus be easily accessed by the metal ions.

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Preparation and properties of phosphinic acid–functionalized polyacrylonitrile hollow fiber membrane for heavy metal adsorption

Cited by 3 publications

References 49 publications

Iron Control in Liquid Effluents: Pseudo-Emulsion Based Hollow Fiber Membrane with Strip Dispersion Technology with Pseudo-Protic Ionic Liquid (RNH3+HSO4−) as Mobile Carrier

Iron Control in Liquid Effluents: Pseudo-Emulsion Based Hollow Fiber Membrane with Strip Dispersion Technology with Pseudo-Protic Ionic Liquid (RNH3+HSO4−) as Mobile Carrier

Progress in the preparation of phosphorus-containing polymers via phosphorus trichloride-free routes

Modification of pre-oxidized polyacrylonitrile fibers as chelating sorbents for removal of Copper(II) ions

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