vuzbiochemiИзвестия вузов. Прикладная химия и биотехнологияProceedings of Universities. Applied Chemistry and Biotechnology2227-29252500-1558ИРНИТУ10.21285/2227-2925-2020-10-1-107-113vuzbiochemi-340Research ArticleХИМИЧЕСКАЯ ТЕХНОЛОГИЯCHEMICAL TECHNOLOGYКонцентрирование свинца(II) хелатообразующим сорбентом, содержащим фрагменты метафенилендиаминаLead (II) concentration by a chelating sorbent containing meta-phenylenediamine fragmentsАлиевЭ. Г.AliyevE. H.

Алиев Эльчин Габиль - докторант, заведующий Центральной лабораторией.

Az 1010, Баку, ул. А. Аббасова, 110.

Elchin H. Aliyev - Azersu Open Joint-Stock Company, Central Laboratory.

110 A Abbasov St., Baku Az 1010.

ciraqov@mail.ruБахмановаФ. Н.BahmanovaF. N.

Бахманова Фидан Нариман - кандидат химических наук, старший научный сотрудник.

Az 1148, Баку, ул. З. Халилова, 23.

Fidan N. Bahmanova - Ph.D. (Chemistry), Senior Researcher, Baku State University.

23 Z. Khalilov St., Baku AZ-1148.

fidan_chem@rambler.ruГамидовС. З.HamidovS. Z.

Гамидов Сахиль Захид - кандидат химических наук, доцент.

Az 1148, Баку, ул. З. Халилова, 23.

Sahil Z. Hamidov - Ph.D. (Chemistry), Associate Professor, Baku State University.

23 Z. Khalilov St., Baku AZ-1148.

ciraqov@mail.ruЧыраговФ. М.ChyragovF. M.

Чырагов Фамиль Муса - доктор химических наук, профессор.

Az 1148, Баку, ул. З. Халилова, 23.

Famil M. Chyragov - Dr. Sci. (Chemistry), Professor, Baku State University.

23 Z. Khalilov St., Baku AZ-1148.

ciraqov@mail.ruОАО «Азерсу»АзербайджанAzersu Open Joint-Stock CompanyAzerbaijanБакинский государственный университетАзербайджанBaku State UniversityAzerbaijan202002042020101107113Copyright © Алиев Э.Г., Бахманова Ф.Н., Гамидов С.З., Чырагов Ф.М., 20202020Алиев Э.Г., Бахманова Ф.Н., Гамидов С.З., Чырагов Ф.М.Aliyev E.H., Bahmanova F.N., Hamidov S.Z., Chyragov F.M.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://vuzbiochemi.elpub.ru/jour/article/view/340

Синтезирован  сорбент  на  основе  сополимера  малеинового  ангидрида  со  стиролом, содержащий фрагменты м-фенилендиамина. Идентификацию полученного сорбента, высушенного при 50–60 °С, проводили методом инфракрасной спектроскопии. Был исследован процесс сорбции свинца синтезированным сорбентом. С этой целью было определено влияние рН среды, времени, ионной силы, концентрации металла на сорбцию. Эксперимент показал, что максимальная сорбция происходит при рН = 6. Полная сорбция свинца(II) происходит после 3 ч контакта металла с сорбентом. Результаты анализа влияния ионной силы на сорбцию показали, что увеличение ионной силы до 0,6 моль/л на сорбцию влияет незаметно, последующее же увеличение приводит к значительному уменьшению сорбции.

Построена изотерма сорбции свинца синтезированным сорбентом и исследованы оптимальные условия концентрирования. Результаты анализа показали, что с увеличением концентрации ионов свинца(II) в растворе увеличивается количество сорбированного металла, а при концентрации 6·10-3 моль/л оно становится максимальным (pH = 6, СPb+2 = 6·10-3 моль/л, Vоб. = 20 мл, mсорб. = 0,05 г, СЕ = 405 мг/г). Степень извлечения ионов свинца(II) при оптимальных условиях превышает 95 %. Исследование сорбции проводилось в статических и динамических условиях. Изучено влияние разных минеральных кислот (HClО4, H2SО4, HNО3, HCl) с одинаковой концентрацией на десорбцию свинца(II) из сорбента. Эксперимент показал, что максимальная десорбция свинца(II) происходит в серной кислоте. Таким образом, предлагаемая новая комплексная экспрессная методика, включающая предварительное концентрирование свинца(II) синтезированным сорбентом, позволяет количественно выделять свинец(II) из большого объема пробы со сложным фоновым составом.

A   sorbent   based   on   a   copolymer   of   maleic   anhydride   with   styrene,   containing m-phenylenediamine fragments was synthesised. After drying at 50–60 °С, the obtained sorbent was identified using IR spectroscopy. Further, a study of lead sorption by a synthesised sorbent was conducted. For this purpose, the effect of pH, time, ionic strength and metal concentration on sorption was determined. According to the experiment, the maximum sorption was established at рН = 6. Complete sorption of lead (II) wasobtained following 3 hours of metal contact with the sorbent. The effect of increase in ionic strength to 0.6 mol/L on sorption was shown to be insignificant, with a subsequent increase leading to a critical decrease in sorption value. The isotherm of lead sorption by the synthesised sorbent was constructed and the optimal concentration conditions studied. The analysis results demonstrated an increase in the concentration of lead (II) ions in the solution to provide higher values of sorbed metal concentration with the maximum occurring at a concentration of 6·10-3 mol/L (pH = 6, СPb+2= 6·10-3mol/L, Vsample= 20 mL, msorb.= 0.05 g, CE = 405 mg/g). Under optimal conditions, the extraction degree of lead (II) ions exceeds 95 %. The study of sorption was carried out both under static and dynamic conditions. Additionally, the effect of various mineral acids (HClO4, H2SO4, HNO3, HCl) of the equal concentration on the desorption of lead (II) from the sorbent was studied. The maximum desorption of lead (II) was obtained in sulphuric acid. Thus, the proposed express technique including preliminary concentration of lead (II) with a synthesised sorbent provides quantitative isolation of lead (II) from a large sample volume with a complex background composition.

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