Liquid low-level radioactive wastes treatment by using hydrophobized track-etched membranes

Zdorovets, Maxim V.; Yeszhanov, Arman B.; Korolkov, Ilya V.; Güven, Olgun; Dosmagambetova, Saule S.; Shlimas, Dmitriy I.; Zhatkanbayeva, Zh.K.; Zhidkov, Ivan S.; Kharkin, P.; Gluchshenko, V. N.; Zheltov, Dmitriy A.; Khlebnikov, N. A.; Kuklin, I.E.

doi:10.1016/j.pnucene.2019.103128

Cited by 28 publications

(13 citation statements)

References 43 publications

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“…A water contact angle was employed to determine the hydrophobicity/hydrophilicity character of the membranes. This technique is widely used for a quick and cheap way to estimate surface hydrophilicity or hydrophobicity even with its known limitations [71][72][73]. The limitations are, in some cases, due to the water droplet penetrating the surface into the micro-voids of the membrane gradually because of capillary force contact with the membrane.…”

Section: Hydrophobicity and Hydrophilicity Analysismentioning

confidence: 99%

Development of ZSM-22/Polyethersulfone Membrane for Effective Salt Rejection

2020

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ZSM-22/polyethersulfone membranes were prepared for salt rejection using modelled brackish water. The membranes were fabricated via direct ZSM-22 incorporation into a polymer matrix, thereby inducing the water permeability, hydrophilicity and fouling resistance of the pristine polyethersulfone (PES) membrane. A ZSM-22 zeolite material with a 60 Si/Al ratio, high crystallinity and needle-like morphologies was produced and effectively used as a nanoadditive in the development of ZSM-22/PES membranes with nominal loadings of 0–0.75 wt.%. The characterisation and membrane performance evaluation of the resulting materials with XRD, BET, FTIR, TEM, SEM and contact angle as well as dead-end cell, respectively, showed improved water permeability in comparison with the pristine PES membrane. These ZSM-22/PES membranes were found to be more effective and superior in the processing of modelled brackish water. The salt rejection of the prepared membranes for NaCl and MgCl2 was effective, while they exhibited quite improved water flux and flux recovery ratios in the membrane permeability and anti-fouling test. This indicates that different amounts of ZSM-22 nanoadditives produce widely divergent influences on the performance of the pristine PES membrane. As such, over 55% of salt rejection is observed, which means that the obtained membranes are effective in salt removal from water.

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Section: Hydrophobicity and Hydrophilicity Analysismentioning

confidence: 99%

Development of ZSM-22/Polyethersulfone Membrane for Effective Salt Rejection

2020

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“…Recently, PET ((-C 10 H 8 O 4 -) n ) membranes have begun to be investigated in the process of MD [ 130 , 131 , 132 , 133 ]. PET is a polymer with high chemical and heat resistance and good resistance to organic solvents and acids, and it has a relatively low thermal conductivity in comparison with PTFE.…”

Section: Membranes For MDmentioning

confidence: 99%

Recent Progress in the Membrane Distillation and Impact of Track-Etched Membranes

et al. 2021

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Membrane distillation (MD) is a rapidly developing field of research and finds applications in desalination of water, purification from nonvolatile substances, and concentration of various solutions. This review presents data from recent studies on the MD process, MD configuration, the type of membranes and membrane hydrophobization. Particular importance has been placed on the methods of hydrophobization and the use of track-etched membranes (TeMs) in the MD process. Hydrophobic TeMs based on poly(ethylene terephthalate) (PET), poly(vinylidene fluoride) (PVDF) and polycarbonate (PC) have been applied in the purification of water from salts and pesticides, as well as in the concentration of low-level liquid radioactive waste (LLLRW). Such membranes are characterized by a narrow pore size distribution, precise values of the number of pores per unit area and narrow thickness. These properties of membranes allow them to be used for more accurate water purification and as model membranes used to test theoretical models (for instance LEP prediction).

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“…Various technologies are employed to remove the radioisotopes from radioactive wastewater, including adsorption [9][10][11], impregnation [12], ion exchange [13][14][15][16], biological methods [4,17], and membrane [18]. Adsorption is an economical and highly effective method supplied the accurate adsorbents are employed in an environment that favors adsorption.…”

Section: Introductionmentioning

confidence: 99%

Application of Solid Waste As An Adsorbent For Capture of 137Cs, 85Sr and 131I From Environmental Water

Metwally¹,

As²,

Hamed³

2021

Preprint

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Cesium, strontium, and iodine radionuclides are produced from uranium fission and easily soluble in water through accidents or leakages, as those occurred at Chernobyl, Three Mile Island, and Fukushima. Thus, developing an economical and effective process for removing these radioisotopes from real water is a progressively important issue. Hence, adsorption of 137Cs, 85Sr, and 131I radionuclides was achieved using solid waste adsorbent. The solid waste adsorbent is granular activated carbon (GAC) gained from the wasted household water filters (from the second stage). After the adsorption process, the gained data illustrated that the percentages of uptake for 137Cs, 85Sr, and 131I were 87.6, 85.6, and 82.7 %, respectively. Application of GAC for the decontamination of real water as groundwater, river water, tap water, and seawater was achieved. The findings revealed that GAC has the ability to be employed effectively as a hopeful material for the decontamination of radioactive 137Cs, 85Sr, and 131I from the environmental water.

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Liquid low-level radioactive wastes treatment by using hydrophobized track-etched membranes

Cited by 28 publications

References 43 publications

Development of ZSM-22/Polyethersulfone Membrane for Effective Salt Rejection

Development of ZSM-22/Polyethersulfone Membrane for Effective Salt Rejection

Recent Progress in the Membrane Distillation and Impact of Track-Etched Membranes

Application of Solid Waste As An Adsorbent For Capture of 137Cs, 85Sr and 131I From Environmental Water

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