Stability of a nanofiltration membrane after contact with a low-level liquid radioactive waste

Oliveira, Elizabeth Eugenio de Mello; Barbosa, Celina C. R.; Afonso, Júlio Carlos

doi:10.1590/s0100-40422013000900026

Cited by 3 publications

(1 citation statement)

References 17 publications

(23 reference statements)

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“…Besides the high hydrophilicity observed for the SR90 membrane (Table 3), other factors such as the composition and morphology of the selective layer [39], as well as the structure of NF…”

Section: Rejection Of Single Salts and Individual Solutions Of Surfac...mentioning

confidence: 99%

Interaction between surfactants of different classes and nanofiltration membranes

Nunes¹,

Ferraz

Kronemberger³

2022

Sci. Plena

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The presence of surfactants in aquatic environments may alter the water quality parameters. Nanofiltration is a promising technique that can separate surfactants from water with high rejections. Nevertheless, negative charges on nanofiltration membranes could facilitate the occurrence of electrostatic interactions between the charged surfactants and the surface of these membranes, increasing the membrane-fouling tendency. In this work, the interaction of surfactants commonly found in residential laundry wastewater with membranes used in nanofiltration was investigated. For this purpose, the surface, and transport properties of four commercial membranes were analyzed. The zeta potential of the NF90 membrane in the presence of individual and mixture of surfactants was performed to evaluate the effect of adsorption of these surfactants on the performance of the membrane. Additionally, a central composite rotatable design (CCDR) and response surface model were applied to investigate the simultaneous effect of the initial concentration of CTAB and SDS ([CTAB + SDS]0) and pH on the NF90 permeate fluxes and rejections. It was shown that surfactant adsorption varies with the type of surfactant and membrane. Moreover, adsorption played an important role in NF90 membrane fouling, mainly for the cationic surfactant in individual solutions and in the mixture of surfactants. Besides adsorption, pore blocking may have affected the performance of nanofiltration for higher concentrations of surfactants. Finally, by the application of the central composite rotatable design (CCDR), it was possible to find the best conditions of pH and initial concentration of surfactants for achieving higher fluxes and rejections by the NF90 membrane.

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“…Besides the high hydrophilicity observed for the SR90 membrane (Table 3), other factors such as the composition and morphology of the selective layer [39], as well as the structure of NF…”

Section: Rejection Of Single Salts and Individual Solutions Of Surfac...mentioning

confidence: 99%

Interaction between surfactants of different classes and nanofiltration membranes

Nunes¹,

Ferraz

Kronemberger³

2022

Sci. Plena

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Ceramic nanofiltration and membrane distillation hybrid membrane processes for the purification and recycling of boric acid from simulative radioactive waste water

Chen

et al. 2019

Journal of Membrane Science

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Removal of uranium from ammonium nitrate solution by nanofiltration

et al. 2017

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Two types of nanofiltration membranes were tested to remove uranium dissolved in ammonium nitrate solution, and the influence of operating parameters as transmembrane pressure, tangential velocity and feed temperature was investigated. Experimental results showed NF270 membrane can reject more than 96% uranium and allow most (90% min) ammonium nitrate solution passed by, and with a permeate flux of 60 L/(m

show abstract

Stability of a nanofiltration membrane after contact with a low-level liquid radioactive waste

Cited by 3 publications

References 17 publications

Interaction between surfactants of different classes and nanofiltration membranes

Interaction between surfactants of different classes and nanofiltration membranes

Ceramic nanofiltration and membrane distillation hybrid membrane processes for the purification and recycling of boric acid from simulative radioactive waste water

Removal of uranium from ammonium nitrate solution by nanofiltration

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