English
Русский 78 – 92 p.
Objectives: to study the kinetics and mechanism of dye adsorption by cellulose raw materials. Methods. As a sorbent, waste from crop production was used – ground sunflower stalks, initial and modified with 10% NaOH alkali, with a particle size from 1 to 2 mm. Methylene blue dye was selected as an adsorbate by preliminary tests. Adsorption isotherms were constructed to determine the maximum sorption capacity. Kinetic models of sorption of the pseudo-first and pseudo-second order are constructed. In order to determine the mechanism of the process, thermodynamic constants were determined: sorption energy (E), Gibbs energy (ΔG) and Bio coefficient (Bi).
Results. The maximum sorption capacity of the crushed biomass of sunflower stalks in relation to the dye is 0.52 mmol/g for the alkali-modified material, which is 48% higher than the initial content (0.35 mmol/g). Thus, the SP(NaOH) material showed improved sorption properties, and it was selected for further kinetic studies. The sorp-tion energy is 5.82 kJ/mol, which may indicate physical adsorption. The Gibbs energy is -6.3742 kJ/mol, less than zero, which indicates the spontaneity of this process. The adsorption equilibrium for the MG dye occurs after 120 minutes, the kinetic curve has a smooth character. The Bio coefficient is 1.812, therefore, the adsorption process is limited by mixed diffusion.
Conclusions. The analysis of the data obtained made it possible to determine the Bio coefficient reflecting the course of MG adsorption by a mixed–diffusion mechanism over the entire time range of adsorption. This indicates the complex character of the MG adsorption process and confirms the importance of taking into account various factors influencing this process when developing methods for cleaning aquatic environments from organic pollu-tants.
Results. The maximum sorption capacity of the crushed biomass of sunflower stalks in relation to the dye is 0.52 mmol/g for the alkali-modified material, which is 48% higher than the initial content (0.35 mmol/g). Thus, the SP(NaOH) material showed improved sorption properties, and it was selected for further kinetic studies. The sorp-tion energy is 5.82 kJ/mol, which may indicate physical adsorption. The Gibbs energy is -6.3742 kJ/mol, less than zero, which indicates the spontaneity of this process. The adsorption equilibrium for the MG dye occurs after 120 minutes, the kinetic curve has a smooth character. The Bio coefficient is 1.812, therefore, the adsorption process is limited by mixed diffusion.
Conclusions. The analysis of the data obtained made it possible to determine the Bio coefficient reflecting the course of MG adsorption by a mixed–diffusion mechanism over the entire time range of adsorption. This indicates the complex character of the MG adsorption process and confirms the importance of taking into account various factors influencing this process when developing methods for cleaning aquatic environments from organic pollu-tants.
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2. Shaikhiev I.G., Kraysman N.V., Sverguzova S.V. et al. Fish scales as a biosorbent of pollutants from wastewaters and natural waters (A literature review). Biointerface Research in Applied Chemistry. 2020. Vol. 10.No. 6. P. 6893 – 6905. DOI 10.33263/BRIAC106.68936905
3. Sverguzova S.V., Sapronova Zh.A., Shaikhiev I.G. et al. Use of Waste Paper Recycling as a Sorption Material for Methylene Blue Dye Removal from Model Solutions. Russian Journal of General Chemistry. 2023. Vol. 93. No. 12. P. 3258 – 3263. DOI 10.1134/s1070363223120277
4. Bely V.A., Sverguzova S.V., Shaikhiev I.G. et al. Extraction of the dye methylene blue from solutions of syc-amore sawdust biomass. News of higher educational institutions. Series: Chemistry and chemical technology. 2023. Vol. 66. No. 5. P. 139 – 145. DOI 10.6060/ivkkt.20236605.6757
5. Sverguzova S.V., Shaikhiev I.G., Sapronova Zh.A. et al. Sorption activity of zoocompost in relation to ions copper Cu(II). Sorption and chromatographic processes. 2023. Vol. 23. No. 6. P. 1051 – 1059. DOI 10.17308/sorpchrom.2023.23/11866
6. Sverguzova S.V., Bomba I.V., Voronina Yu.S. Purification of oil-containing emulsions with leaf litter from cherry and rowan. Chemical Bulletin. 2018. Vol. 1. No. 4. P. 4 – 10.
7. Shaikhiev I.G., Sverguzova S.V., Shaikhieva K.I., Deberdeev T.R. Using Rye (Secale Cereale) Processing Wastes as Sorption Materials for Removing Pollutants from Aquatic Environments. Polymer Science, Series D. 2023. Vol. 16. No. 3. P. 651 – 656. DOI 10.1134/s1995421223030346
8. Shaikhiev I.G., Sverguzova S.V., Shaikhieva K.I. et al. Use of tangerine peel as a sorption materials for re-moving pollutants from aquatic environments. Chemistry of plant raw materials. 2023. No. 1. P. 61 – 75. DOI 10.14258/jcprm.20230111931
9. Sverguzova S.V., Gafarov R.R., Zubkova O.S. et al. Changes in the Physicochemical and Sorption Properties of Bleaching Clay in the Course of Thermal Treatment. Colloid Journal . 2024. Vol. 86. No. 4. P. 571 – 579. DOI 10.1134/S1061933X24600490
10. Shaikhiev I.G., Sverguzova S.V., Gafarov R.R., Sapronova Zh.A. Rational use of oil extraction waste pro-duction – spent bleaching clay. Ecology and Industry of Russia. 2024. Vol. 28. No. 7. P. 14 – 19. DOI 10.18412/1816-0395-2024-7-14-19
11. Kim O.K., Volkova L.D., Zakarina N.A. Aluminum-pillared and iron layered aluminosilicates in the pro-cesses of purification of aqueous solutions from chromium (III). Bashkir Chemical Journal. 2011. Vol. 18. No. 3. Pp. 62 – 65.
12. Belchinskaya L.I. et al. The influence of salt modification on the adsorption characteristics of acid-activated montmorillonite and kaolinite. Journal of Applied Chemistry. 2008. Vol. 81. No. 6. P. 926 – 930.
13. Kiryushina N.Yu., Tarasova G.I., Sverguzova S.V. Slag waste in water treatment. Bulletin of the Belgorod State Technological University named after VG Shukhov. 2010. No. 4. P. 140 – 145.
14. Svergusova S.V., Sapronova Z.A., Svyatchenko A.V. et al. Iron-Containing Modeled Waste as Raw Material for Coagulant Receiving. IOP Conference Series: Earth and Environmental Science, Russky Island, 04 -06 March 2019. Vol. 272, 3. Russky Island: Institute of Physics Publishing, 2019. P. 032007. DOI 10.1088/1755-1315/272/3/032007
15. Starostina I.V., Kiryushina N.Yu., Loktionova E.V., Matushkina A.V. Obtaining an iron-silicon flocculant-coagulant from metallurgical waste and its use in the process of treating emulsified wastewater. Ecology and Indus-try of Russia. 2022. Vol. 26. No. 7. Pp. 20 – 25. DOI 10.18412/1816- 0395-2022-7-20-25
16. Lukashevich O.D., Usova N.T. Sorbent from ferrous sludge for wastewater treatment from heavy metal ions. Bulletin of Tomsk State University of Architecture and Civil Engineering. 2018. Vol. 20. No. 1. P. 148 – 159.
17. Nikolaeva L.A. et al. Methods of recycling waste sorbent of petroleum products based on sludge from chem-ical water treatment of Kazan TPP-1. Ecology and Industry of Russia. 2014. No. 7. P. 18 – 20.
18. Loktionova E.V., Maltseva E.K., Sysa V.I. The use of expanded clay gravel production waste for oily wastewater purification. December 10, 2021, 2021. P. 151 – 156.
19. Loktionova E.V., Sysa O.K., Loktionov V.A. Extraction of methylene blue coloring agent from model solu-tions with a plant-origin sorbent. Journal of Physics: Conference Series, Belgorod, March 09-10, 2021. Vol. 1926. Belgorod: IOP Publishing Ltd, 2021. P. 012018. DOI 10.1088/1742-6596/1926/1/012018
20. Sverguzova S.V., Sapronova Zh.A., Loktionova E.V. et al. Use of plant sorbent for extraction of Congo red dye from model solutions. Chemical Bulletin. 2021 . T. 4. No. 1. P. 44 – 55.
21. Sakalova G.V., Sverguzova S.V., Malovany M.S. Efficiency of wastewater treatment of galvanic production by the adsorption method. Bulletin of BSTU named after V.G. Shukhov. 2014. No. 4. Pp. 153 - 156.
22. Paltiel L.R., Zenin G.S., Volynets N.F. Colloidal chemistry: a tutorial, SZGU, St. Petersburg, 2004. 68 p.
23. Galimova R.Z., Shaikhiev I.G., Sverguzova S.V. Processing the results of the study of adsorption processes using Microsoft Excel software. 2017.
Evtushenko E. I., Loktionova E.V., Shaikhiev I.G., Sapronova Zh.A. Kinetics and mechanism of adsorption of methylene blue dye by crushed sunflower biomass. Chemical Bulletin. 2024. 7 (3). P. 78 – 92. https://doi.org/10.58224/2619-0575-2024-7-3-78-92