danДоклады Национальной академии наук БеларусиDoklady of the National Academy of Sciences of Belarus1561-83232524-2431The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"10.29235/1561-8323-2025-69-6-477-487dan-1283Research ArticleХИМИЯCHEMISTRYАдсорбция ионов Ni2+ карбонатными и фосфатными сорбентамиAdsorption of Ni 2+ ions by phosphate and carbonate adsorbentshttps://orcid.org/0000-0002-3448-7887ШашковаИ. Л.ShashkovaI. L.

Шашкова Ирина Лукинична – канд. хим. наук, вед. науч. сотрудник

ул. Сурганова, 9/1, 220072, Минск 

Shashkova Irina L. ‒ Ph. D. (Chemistry), Leading Researcher

9/1, Surganov Str., 220072, Minsk

shashkova@igic.bas-net.byhttps://orcid.org/0000-0001-5608-773XКитиковаН. В.KitikovaN. V.

Китикова Наталья Владиленовна – канд. хим. наук, ст. науч. сотрудник

ул. Сурганова, 9/1, 220072, Минск 

Kitikova Natalja V. ‒ Ph. D. (Chemishry), Senior Researcher

9/1, Surganov Str., 220072, Minsk

kitikova@igic.bas-net.byhttps://orcid.org/0000-0002-3053-317XИванецА. И.IvanetsA. I.

Иванец Андрей Иванович – член-корреспондент, д-р хим. наук, профессор, научный руководитель лаборатории

ул. Сурганова, 9/1, 220072, Минск 

Ivanets Andrei I. ‒ Corresponding Member, D. Sc. (Chemistry), Professor, Science Head of the Laboratory

9/1, Surganov Str., 220072, Minsk

andreiivanets@yandex.ruhttps://orcid.org/0000-0002-8598-2079КузнецоваТ. Ф.KouznetsovaT. F.

Кузнецова Татьяна Федоровна ‒ канд. хим. наук, доцент, заведующий лабораторией

ул. Сурганова, 9/1, 220072, Минск 

Kouznetsova Tatyana F. ‒ Ph. D. (Chemistry), Associate Professor, Head of the Laboratory

9/1, Surganov Str., 220072, Minsk

tatyana.fk@gmail.comhttps://orcid.org/0000-0002-6532-9427ПрозоровичВ. Г.ProzorovichV. G.

Прозорович Владимир Геннадиевич ‒ ст. науч. сотрудник

ул. Сурганова, 9/1, 220072, Минск 

Prozorovich Vladimir G. ‒ Senior Researcher 

9/1, Surganov Str., 220072, Minsk

vladimirprozorovich@yahoo.comИнститут общей и неорганической химии Национальной академии наук БеларусиInstitute of General and Inorganic Chemistry of the National Academy of Sciences of Belarus202505012026696477487Copyright © Шашкова И.Л., Китикова Н.В., Иванец А.И., Кузнецова Т.Ф., Прозорович В.Г., 20262026Шашкова И.Л., Китикова Н.В., Иванец А.И., Кузнецова Т.Ф., Прозорович В.Г.Shashkova I.L., Kitikova N.V., Ivanets A.I., Kouznetsova T.F., Prozorovich V.G.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://doklady.belnauka.by/jour/article/view/1283

Изучена адсорбция ионов Ni2+ сорбентами на основе термически активированного при 800 °С доломита (Д-800), фосфатированного доломита (ФД) и Zr-модифицированного ФД (ФД-Zr). Установлено, что образец Д-800 характеризуется наиболее высокой сорбционной емкостью (364 мг/г), при исходной концентрации ионов Ni2+ 300 мг/л достигается очистка водных растворов до норм предельно допустимой концентрации (ПДК) питьевой воды (менее 0,1 мг/л), а при С0 Ni2+ 50 мг/л глубокая очистка до остаточной концентрации менее 0,01 мг/л. Выявлено, что поглощение ионов Ni2+ сорбентом Д-800 обусловлено гетерогенным осаждением основного карбоната никеля, а в случае сорбента ФД образуется гидрофосфат никеля. Результаты десорбции ионов Ni2+ из насыщенных сорбентов свидетельствуют о протекании ионного обмена с участием аморфного фосфата циркония для образца ФД-Zr. При этом наименьшую степень десорбции (<1 %) показали образцы Д-800 и ФД. В динамической сорбции гранульный сорбент Д-800 обеспечивает очистку более 1000 колоночных объемов раствора с С0 10 мг/л ниже уровня ПДК питьевой воды при линейной скорости фильтрации 20 м/ч.

The adsorption of Ni2+ ions by sorbents based on dolomite thermally activated at 800 °C (D-800), phosphated dolomite (PD), and Zr-modified PD (PD-Zr) was studied. It was found that D-800 sample was characterized by the highest sorption capacity (364 mg/g), while at the initial concentration of Ni2+ ions of 300 mg/L, the purification of aqueous solutions to the MPC standards for drinking water (< 0.1 mg/L) was achieved, and at C0 (Ni2+) of 50 mg/L, deep purification to a residual concentration of < 0.01 mg/L occurred. It was revealed that the absorption of Ni2+ ions by the D-800 sorbent is due to the heterogeneous precipitation of nickel hydroxicarbonate, and in the case of the PD sorbent, nickel hydrophosphate is formed. The results of desorption of Ni2+ ions from saturated sorbents indicated the occurrence of ion exchange with the participation of amorphous zirconium phosphate for the PD-Zr sample. The lowest desorption degree (<1 %) was demonstrated by samples D-800 and PD. In the dynamic sorption process, the granular sorbent D-800 provided purification of more than 1000 column volumes of solution with C 0 (Ni2+) 10 mg/L below the MPC standards for drinking water at a linear filtration rate of 20 m/h.

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