Applied Sciences
| Open Access |
DOI: Effect Of Solution Medium And Temperature On The Sorption Of Silver Ions By Impregnated Sorbents
Ochildiyev Sherzod Sherali o‘g‘li , Termez state university, UzbekistanAbstract
The influence of the medium’s acidity and temperature on the sorption of silver ions by impregnated polymer sorbents was investigated. The sorption process was studied in the pH range of 1–12 using PAD400, PAD600, and FK-based sorbents modified with chelating ligands such as MAB, Dtz, and DEDTK. The results demonstrated that the sorption efficiency strongly depends on the acidity of the solution, with maximum sorption observed at pH = 3. The kinetics of silver ion sorption were analyzed using pseudo-first-order, pseudo-second-order, and intra-particle diffusion models. Experimental data showed that the sorption process reaches equilibrium within 60 minutes. Comparison of the kinetic parameters revealed that the pseudo-second-order model best describes the sorption process for all sorbents, with correlation coefficients (R² > 0.99) and calculated equilibrium capacities (Qₑ,calc) consistent with experimental data (Qₑ,obs). These findings indicate that the rate-limiting step of the sorption process is the surface chemical reaction between the functional groups of the sorbent and silver ions.
Keywords
Silver ion sorption, impregnated polymer sorbents, pH effect
References
Неудачина Л.К., Петрова Ю.С., Засухин А.С. и др. // Аналитика и контроль. -2011. -Т. 15. -№ 1. -С. 87-95.
Дремичева Е.С. Изучение кинетики сорбции на торфе ионов железа (III) и меди (II) из сточных вод// Вестник Московского университета. -2017. Серия 2. Химия, 58(4).
Ho Y.S., Ng J.C.Y., McKay G. Kinetics of pollutant sorption by biosorbents // Separation and purification methods. -2000. –Vol.29. –N.2. -P.189-232. doi.org/10.1081/SPM-100100009.
Ho Y. S. Review of second-order models for adsorption systems// J. of Hazardous Materials. -2006. – Vol. B136. –P. 681-689.
Douven S., Paez C. A., Gommes C. J. The range of validity of sorption kinetic models // Journal of Colloid and Interface science. -2015.- № 448. -P.437–450.
Корж Е.А., Клименко Н.А. Моделирование кинетики адсорбции фармацевтических веществ на активных углях // Проблемы современной науки и образования. -2017. -ipi1. –C. 1-7.
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