Extraction of Organic Compounds from Aqueous Solutions by the Nanofiltration Method

Kaptakov, V. O.; Milyutin, V. V.; Некрасова, Н. А.; Zelenin, P. G.; Zakharova, Yu. O.; Селиверстов, А. Ф.

doi:10.1134/s1066362220020137

Cited by 2 publications

(3 citation statements)

References 2 publications

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“…The observed sharp increase in the retention capacity at the 4th and 5th stages is apparently due to the fact that organic components are removed at the previous stages solution, which negatively aff ect the extraction of 60 Co. The possibility of eff ective retention of organic complexing substances and surfactants we detected during nanofi ltration was reported in [11]. 137 Cs, which is present in the bottom residues in the form of singly charged Cs + ions, is practically not retained by the NF membrane.…”

Section: Treatment Of Bottom Residues Of the Beloyarsk Nppmentioning

confidence: 56%

“…In the experiments, we used a nanofi ltration polymer membrane of NanoNF-1812 grade produced by the company "RM Nanotech" (Vladimir, Russia), with an eff ective fi ltration area of 0.3 m 2 . The characteristics of the membrane and a description of the laboratory setup are given in [9][10][11][12].…”

Section: Methodological Partmentioning

confidence: 99%

“…In our previous works [9][10][11][12], in experiments on model solutions, it was shown that the NF method is very eff ective for the retention of multiply charged ions of transition metals, uranium, thorium, radionuclides of strontium, cobalt, europium, plutonium, organic complexing agents and surfactants. The main feature of the NF membrane is its low retention capacity for singly charged alkali metal ions, which makes it possible to separate the main inactive salt component of liquid radioactive waste of low and medium activity levels-sodium nitrate-from multiply charged active and inactive components [9,10].…”

Section: Introductionmentioning

confidence: 99%

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Nanofiltration Purification of Liquid Radioactive Waste

Kaptakov,

Milyutin

2023

Radiochemistry

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The paper presents the results of testing the purification of real liquid radioactive waste from radionuclides, bottom residues of the Kola and Beloyarsk nuclear power plants (NPP), as well as low-level wastewater from the radiochemical building of the Institute of Physical Chemistry and Electrochemistry RAS (IPCE RAS) using the method of nanofiltration (NF) using a polymer membrane manufactured by the Russian company “RM Nanotech.” It has been shown that in the case of single-stage NF purification of bottoms of the Kola NPP, the coefficient of purification from 60Co is 2.8, while no purification from 137Cs practically occurs. When cleaning the bottom residues of the Beloyarsk NPP from 60Co using a five-stage scheme, a coefficient of purification from 60Co equal to 388 was obtained. The combination of nanofiltration purification and selective sorption of cesium on the ferrocyanide sorbent Temoksid-35 makes it possible to obtain a dry salt residue that is not related to radioactive waste. When using the method of nanofiltration for the treatment of low-level wastewater of the Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences, the degree of purification was, %: 137Сs ~ 75; 90Sr ~ 91; 241Am ~ 99.5; 152Eu ~ 91; 239Pu ~ 99.5.

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Section: Treatment Of Bottom Residues Of the Beloyarsk Nppmentioning

confidence: 56%

Section: Methodological Partmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Nanofiltration Purification of Liquid Radioactive Waste

Kaptakov,

Milyutin

2023

Radiochemistry

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Nano ltration puri cation of liquid radioactive waste

Kaptakov,

Milyutin

2023

Radiohimiâ

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The paper presents the results of testing the puri cation of real liquid radioactive waste from radionuclides - bottom residues of the Kola and Beloyarsk nuclear power plants (NPP), as well as low-level wastewater from the radiochemical building of the Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences (IPChE RAS) by the method of nano ltration (NF) using a polymer membrane manufactured by the Russian company «RM Nanotech». It has been shown that in the case of single-stage NF puri cation bottoms of the Kola (NPP), the coe cient of puri cation from 60Co is 2.8, while puri cation from 137Cs practically does not occur. When cleaning the bottom residues of the Beloyarsk NPP from 60Co using a ve-stage scheme, a coe cient of puri cation from 60Co equal to 388 was obtained. The combination of nano ltration puri cation and selective sorption of cesium on the ferrocyanide sorbent Temoksid-35 makes it possible to obtain a dry salt residue that is not related to radioactive waste. When using the method of nano ltration for the treatment of low-level wastewater of the Institute of Physical Chemistry and Electrochemistry of the Russian Academy of Sciences, the degree of puri cation was, %: 137Сs ~ 75; 90Sr ~ 91; 241Am ~ 99.5; 152Eu ~ 91; 239Pu ~ 99.5.

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Extraction of Organic Compounds from Aqueous Solutions by the Nanofiltration Method

Cited by 2 publications

References 2 publications

Nanofiltration Purification of Liquid Radioactive Waste

Nanofiltration Purification of Liquid Radioactive Waste

Nano ltration puri cation of liquid radioactive waste

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