Processes of ion exchange sorption and desorption of Cu2+ and Zn2+ ions on a composite sorbent
Abstract
The results of an experimental study of the processes of ion exchange sorption and desorption of copper and zinc ions on a composite sorbent are presented. The sorbent is obtained from modified sawdust and chitosan at a molar ratio of 1:0,4. The average particle size is 1,6 mm. The sorbent has a macroporous structure and contains carboxyl, phenolic hydroxyl groups and amino groups capable of ion exchange with heavy metal ions from solutions. The experimental study is а passing the initial solution through a stationary annular sorbent layer and removing the output curves of ion exchange. The sorbent with a volume of 9,8∙10-4 м3 was placed in an annular adsorber between the inner and outer gratings. In the study of the direct ion exchange process, solutions of copper and zinc sulfates with a concentration of 0,05 N with volumetric velocity 8,1·10-6 m3/с and a sorbent in Na- form were used. Sorbent was regenerated from heavy metal ions with 0,08 N sodium hydroxide solution with volumetric velocity 3,2∙10-6 m3/с. The full exchange capacities of the sorbent, the degree of regeneration of the sorbent and the specific consumption of the regeneration solution were calculated based on the output curves of ion exchange. The analysis of experimental data showed a decrease in the exchange capacity of the sorbent during its repeated use. After five sorption-desorption cycles, the value of the total dynamic exchange capacity of the sorbent decreased for copper ions by 30% and for zinc ions by 25%. The decrease in the exchange capacity is associated with a decrease in the amount of carboxyl and phenolic hydroxyl groups in the sorbent, as well as with the compaction of its structure and, consequently, a decrease in the availability of functional groups.
References
Sharma P.K., Ayub S., Tripathi C.N. Agro and Horticultural International Refereed Journal of Engineering and Science. 2013. V. 2. N 8. P. 18–27.
Lakshmipathy R., Sarada N.C., Jayaprakash N. International Journal of ChemTech Research. 2015. V. 8. N 5. P. 25–31.
Acharya J., Kumar U., Mahammed. P.R. International Journal of Current Engineering and Technology. 2018. V. 8. N 3. P. 526–530. DOI: 10.1016/j.biortech.2007.06.011.
Wan Ngah W.S., Hanafiah M.A.K.M. Bioresource Tech-nology. 2008. V. 99. N 10. P. 3935–3948. DOI: 10.1016/j.biortech.2007.06.011.
Hegazi H.A. HBRC Journal. 2013. N 9. P. 276–282. DOI: 10.1016/j.hbrcj.2013.08.004.
Sahmoune M.N., Yeddou A.R. Desalination and Water Treatment. 2016. V. 57. N 50. P. 1–16. DOI: 10.1080/19443994.2015.1135824.
Argun M.E., Dursun S., Ozdemir C., Karatas M. Journal of hazardous materials. 2007. V. 6. N 1. P. 77–85. DOI: 10.1016/j.jhazmat.2006.06.095.
Meez E., Rahdar A., Kyzas G.Z. Molecules. 2021. V. 26. N 14. P. 4318–4328. DOI: org/10.3390/molecules26144318.
Yang, L., Tan W.-F., Mumford K., Ding L., Lv J.-W., Zhang X.-W., Wang H.-Q. Sep. Sci. Technol. 2018. N 53. P. 2704–2716. DOI: 10.1002/adma.201104714.
Jianfui C., Sarjadi M.S., Musta B., Sarkar M.S., Rahman M.L. ChemistrySelect. 2019. N 4. P. 2991–3001.
Salman H., Shaheen H, Abbas G., Khalouf N. Journal of Entomology and Zoology Studies. 2017. V. 5. N 4. P. 452–461.
Belviso С. Processes. 2020. V. 8. N 7. DOI:org/10.3390/ pr8070820.
Halimoon N., Yin R.G.S. Environment Asia. 2010. N 3.
P 124–130. DOI: 10.14456/ea.2010.51.
Hamadi A., Nabih K. Journal of Chemistry. 2018. N 3. P. 1–12. DOI: 10.1155/2018/6207910.
Gordina N.E., Prokof’ev V.Yu., Borisova T.N., Elizarova A.M. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.] 2019. V. 62. N 7. P. 99–106. DOI: 10.6060/ivkkt201962fp.5725. (in Russian).
Gordina N.E. Rus.Chem.J. 2018. V. LXII. N 4. P. 89–109 (in Russian).
Silina Yu.A., Spiridonov B.A., Bityutskikh M.Yu., Kuch-menko T.A. Vestnik VSUIT. 2013. N 3. P. 138-142 (in Russian).
Ugwu I.M., Igbokwe O.I. Sorption of Heavy Metals on Clay Minerals and Oxides: A Review. In book: Edebali S. Advanced Sorption Process Applications. Great Britain: IntechOpen. 2019. 218. P. DOI: 10.5772/intechopen.80989.
Carolin CF, Kumar PS, Saravanan A, Joshiba GJ, Naushad M. Journal of Environmental Chemical Engineering. 2017. V. 5. N 3. P. 2782–2799. DOI: 10.1016/j.jece.2017.05.029.
Murzakassymova N.С., Bektenov N.A., Gavrilenko M.A. News of NAS RK. Series of chemistry and technologies. 2021. V. 1. N 445. P. 75–79. DOI: 10.32014/2021.2518–1491.9.
Anuzyte E., Vaisis V. Energy Procedia. 2018. V. 147.
P. 295–300. DOI: org/10.1016/j.egypro.2018.07.09.
Qingnan Xu., Hao Yuan, Hongli Wang, Yong Xu, Dez-heng Yang. A Catalysts. 2022. V. 12. N 4. P. 398–415. DOI: org/10.3390/catal12040398.
Melnikov A.A., Gordina N.E., Tyukanova K.A., Gusev G.I., Gushchin A.A., Rumyantsev R.N. ChemChemTech [Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2021. V. 64. N 8. P. 6371. DOI: 10.6060/ivkkt.20216408.6422. (in Russian).
Natareev S.V., Zakharov D.E., Snigirev M.Yu. Modern high technologies. Regional application. Ivanovo. 2022. N 3 (71). P. 67-71 (in Russian).
Zaharov D.E., Natareev S.V., Snegirev1 D. G. The jour-nal modern problems of civil protection. 2020. N 4 (37).
P. 56-61 (in Russian).
Selemenev V.F., Slavinskaya G.V., Khokhlov V.Yu., Ivanov V.A., Gorshkov V.I., Timofeevskaya V.D. Workshop on ion exchange. Voronezh: VSU. 2004. 160 p. (in Russian).
Alekseev V.N. Quantitative analysis. M.: Alliance. 2007. 504 p. (in Russian).
Redkin N.A. IR-Fourier spectroscopy and mass spectroscopy in the identification of organic compounds. Samara: SU. 2019. 92 p. (in Russian).
