Recovery of Boric Acid from Aqueous Solutions Using Polycondensation Anion Exchangers
Электронный архив УГЛТУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Recovery of Boric Acid from Aqueous Solutions Using Polycondensation Anion Exchangers
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| Автор |
Lipunov, I. N.
Pervova, I. G. |
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| Тематика |
BORIDE COATINGS
EARTH SCIENCES ION EXCHANGE RESINS NEGATIVE IONS POLYCONDENSATION SORPTION ACID MOLECULES ANION EXCHANGERS COMPLEX FORMATIONS EPICHLOROHYDRIN HYDROXYL GROUPS MONOETHANOLAMINE SORPTION BEHAVIORS SORPTION CAPACITIES BORIC ACID |
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| Описание |
The sorption behavior and mechanism of boric acid recovery on polymerization anion exchangers of both strongly and weakly basic types are now fairly well understood, while a current knowledge of the sorption of boric acid on polycondensation anion exchangers is limited. The present investigation was carried out to establish influences of temperature, concentration and pH of boric acid on its sorption behavior. It was used polycondensation anion exchangers based on monoethanolamine and epichlorohydrin (SB-1, SB-2) and pyrocatechol and formaldehyde (SB-7, SB-8). It has been revealed that anion exchangers in the hydroxyl form containing alcohol and aminooxyethyl functional groups possess high sorption activity and selectivity for boron. When sorption of boric acid from solutions at a concentration more than 0.057 M, pH 5.0-7.5, the exchangers have been shown to possess unusually high sorption capacity for boron. It has been established that the mechanism of boric acid sorption on the hydroxyl-form polycondensation anion exchanger has the mixed nature owing to the fact that it was observed two simultaneous processes: first, chemisorption of boric acid molecules by the hydroxyl groups of the anion exchangers, coupled with the accumulation of tetraborate anions [B4O5(OH)4]2- in the sorbent phase, and second, complex formation of polynuclear boron compounds. © Published under licence by IOP Publishing Ltd.
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| Дата |
2022-07-12T08:09:11Z
2022-07-12T08:09:11Z 2021 |
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| Тип |
Conference Paper
Conference object (info:eu-repo/semantics/conferenceObject) Published version (info:eu-repo/semantics/publishedVersion) |
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| Идентификатор |
Lipunov, I. N. Recovery of Boric Acid from Aqueous Solutions Using Polycondensation Anion Exchangers / I. N. Lipunov, I. G. Pervova // IOP Conference Series: Earth and Environmental Science. – 2021. – Vol. 666. – Iss. 4. – № 42031.
1755-1307 https://elar.usfeu.ru/handle/123456789/11682 |
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| Язык |
en
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| Права |
Open Access
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| Издатель |
IOP Publishing Ltd
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| Источник |
IOP Conference Series: Earth and Environmental Science
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