rmjournalЭталоны. Стандартные образцыMeasurement Standards. Reference Materials2687-0886D. I. Mendeleyev Institute for Metrology10.20915/2077-177-2022-18-2-57-71rmjournal-354Research ArticleСовременные методы анализа веществ и материаловModern methods of analysis of substances and materialsСелективная сорбция ионов серебра из водных растворов поли(N-тиокарбамоил‑ 3-аминопропилсилсесквиоксаном)Selective Sorption of Silver Ions from Aqueous Solutions Using Poly(N-thiocarbamoyl‑ 3-aminopropylsilsesquioxane)https://orcid.org/0000-0003-1747-9110МельникЕ. А.MelnikE. A.

аспирант, инженер кафедры аналитической химии и химии окружающей среды, инженер отдела Государственной службы стандартных образцов

Post-graduate Student, Engineer of the Department of Analytical and Environmental Chemistry, engineer of the department of theState Service of Reference Materials

ea-melnik@mail.ruhttps://orcid.org/0000-0003-0116-6689СысолятинаА. А.SysolyatinaA. A.

магистрант

Master Student

fenisam31@gmail.comhttps://orcid.org/0000-0001-6752-769XХолмогороваА. С.KholmogorovaA. S.

кандидат химических наук, доцент кафедры аналитической химии и химии окружающей среды

Cand. Sc. (Chem.), Associate Professor of the Department of Analytical and Environmental Chemistry

kholmoghorovaa@mail.ruhttps://orcid.org/0000-0002-8745-2848НеудачинаЛ. К.NeudachinaL. K.

кандидат химических наук, заведующий кафедрой аналитической химии и химии окружающей среды

Cand. Sc. (Chem.), Head of the Depar tment of Analytical and Environmental Chemistry

neudachina_lk@mail.ruhttps://orcid.org/0000-0001-7451-9428ОсиповаВ. А.OsipovaV. A.

младший научный сотрудник лаборатории органических материалов

Junior Researcher, Laboratory of Organic Materials

osipova.sva@gmail.comhttps://orcid.org/0000-0002-4270-3041ПестовВ. А.PestovA. V.

кандидат химических наук, старший научный сотрудник, и. о. заведующего лабораторией органических материалов

Cand. Sc. (Chem.), Senior Researcher, Acting Head of the Laborator y of Organic Materials

pestov@ios.uran.ruУральский федеральный университет им. первого Президента России Б. Н. Ельцина, УНИИМ – филиал ФГУП «ВНИИМ им. Д. И. Менделеева»РоссияUral Federal University named after the first President of Russia B. N. Yeltsin (UrFU), UNIIM – Affiliated Branch of the D. I. Mendeleyev Institute for Metrology (UNIIM–VNIIM)Russian FederationУральский федеральный университет им. первого Президента России Б. Н. ЕльцинаРоссияUral Federal Universit y named af ter the first President of Russia B. N. Yeltsin (UrFU)Russian FederationУральский федеральный университет им. первого Президента России Б. Н. ЕльцинаРоссияUral Federal University named after the first President of Russia B. N. Yeltsin (UrFU)Russian FederationИнститут органического синтеза им. И. Я. Постовского УрО РАНРоссияI. Ya. Postovsky Institute of Organic Synthesis of the Ural Branch of the Russian Academy of Sciences (IOS UB RAS)Russian FederationИнститут органического синтеза им. И. Я. Постовского УрО РАНРоссияI. Ya. Postovsky Institute of Organic Synthesis of the Ural Branch of the Russian Academy of Sciences (IOS UB RAS)Russian Federation2022221120221825771Copyright © Мельник Е.А., Сысолятина А.А., Холмогорова А.С., Неудачина Л.К., Осипова В.А., Пестов В.А., 20222022Мельник Е.А., Сысолятина А.А., Холмогорова А.С., Неудачина Л.К., Осипова В.А., Пестов В.А.Melnik E.A., Sysolyatina A.A., Kholmogorova A.S., Neudachina L.K., Osipova V.A., Pestov A.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.rmjournal.ru/jour/article/view/354

Накопление электронного мусора на поверхности земли приводит к загрязнению окружающей среды токсичными ионами металлов, что впоследствии наносит вред всем живым организмам. До сих пор во многих странах применяют гидрометаллургические или ручные методы извлечения ионов серебра из электронных отходов. Данные методы характеризуются неэкологичностью и высокой степенью токсичности, поэтому возникает необходимость внедрения новых экологически безопасных способов выделения ценных компонентов из объектов различного состава.В настоящей статье предложен безвредный для окружающей среды способ извлечения ионов серебра из многокомпонентных систем с помощью поли(N-тиокарбамоил‑3-аминопропилсилсесквиоксана). Поверхность сорбента исследована методом ИК-Фурье-спектроскопии с применением приставки нарушенного полного внутреннего отражения. По данным элементного анализа, концентрация привитых тиомочевинных групп составляет 1,39 ммоль/г. Установлено, что данный сорбент способен количественно извлекать ионы серебра в диапазоне значений рН от 0 до 6 при концентрации ионов серебра в исходном растворе 1·10–4 моль/дм3, статическая сорбционная емкость по ионам серебра в условиях эксперимента достигает 1,22 ммоль/г. При проведении сорбции в динамическом режиме рассчитано значение динамической емкости до проскока – 0,046 ммоль/г и значение полной динамической емкости по ионам серебра – 0,132 ммоль/г. Наибольшая степень десорбции (71–78 %) достигается при использовании сернокислых растворов с градиентом концентрации тиомочевины.

The accumulation of electronic waste (e-waste) on the ground leads to environmental pollution with toxic metal ions, which subsequently harms all living organisms. Many countries still use hydrometallurgical or manual methods to extract silver ions from e-waste. These methods are unsustainable and highly toxic; therefore, it becomes necessary to introduce new environmentally compatible methods for separating valuable components from objects of various compositions. This article proposes an environmentally compatible method for the extraction of silver ions from multicomponent systems using poly(N-thiocarbamoyl‑3-aminopropylsilsesquioxane). The sorbent surface was studied by Fourier-transform infrared spectroscopy using an attenuated total internal reflection accessory. The concentration of grafted thiourea groups is 1.39 mmol/g according to elemental analysis. It has been determined that this sorbent is capable of quantitatively extracting silver ions in the pH range from 0 to 6 at a concentration of silver ions in the initial solution of 1·10–4 mol/dm3; the static sorption capacity for silver ions under experimental conditions reaches 1.22 mmol/g. When sorption is carried out in dynamic mode, the value of the dynamic capacity before breakthrough is 0.046 mmol/g, and the value of the total dynamic capacity for silver ions is 0.132 mmol/g. The highest desorption (71–78 %) is achieved using sulfuric acid solutions with a thiourea concentration gradient.

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The authors declare that there are no conflicts of interest present.