Optimization of UV-photografting factors in preparation of polyacrylic-polyethersulfone forward osmosis membrane using response surface methodology

Rahman, A. F. H. A.; Khushairi, Zulsyazwan Ahmad; Nizam, Abu Seman Mazrul; Khayet, M.

doi:10.1007/s11814-021-0881-6

Cited by 2 publications

(1 citation statement)

References 42 publications

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“…The results indicated that the differences were statistically significant in some cases, and Table S1 in the Supporting Information presents the comparisons among the samples. Other studies conducted on PES membrane modification by UV-initiated polymerization reported a decrease, 20,21 no to little change, 22,23 or an increase 24,25 in surface roughness of membranes after modification. Taniguchi et al 26 investigated the effect of UFPES membrane modification on the surface roughness of the membrane and reported that at high UV irradiation energy dose (>10 to 12 kJ m −2 ), the surface roughness increased with energy dose, whereas at low energy dose (2−12 kJ m −2 ), surface roughness decreases with irradiation energy dose.…”

Section: ■ Introductionmentioning

confidence: 87%

Phosphate-Based Reactive Membranes for Uranium Isotopic Screening

Darge

DeVol

Husson

2022

Ind. Eng. Chem. Res.

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This study describes the application of reactive membranes for the isolation and concentration of uranium from circumneutral pH solutions by ultrafiltration. The reactive membranes were prepared by grafting a uranium-selective polymer layer via ultraviolet-initiated radical polymerization from the surfaces of poly(ethersulfone) ultrafiltration membrane supports. Dynamic uranium binding capacity measurements were conducted using the reactive membranes housed in an inline filter column, and column breakthrough data were fitted to theoretical models. The experimental data were best described by the Thomas model, indicating that uranium sorption was a reaction rate-limited process. Fitted model parameter values were compared with the results from batch experiments, where similar reaction rate constants were obtained for loading from solutions at pH 4 and 6. The maximum uranium binding capacity of the reactive membrane decreased in the presence of multiple competing ions, from 7.8 ± 0.3 mg g–1 in deionized water to 3.6 ± 0.2 mg g–1 in simulated seawater at pH 6. Alpha spectroscopy pulse-height spectra of uranium-loaded reactive membranes were analyzed. Peak energy resolutions measured as full width at half-maximum of 70 ± 8 and 65 ± 5 keV were obtained from samples loaded with uranium from DI and seawater solutions. The results of this study provide an approach for a rapid, on-field screening of liquid samples to complement existing techniques and accelerate sample analyses.

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