Россия
Россия
Россия
ГРНТИ 27.01 Общие вопросы математики
ГРНТИ 31.01 Общие вопросы химии
ГРНТИ 34.01 Общие вопросы биологии
Melanoidins are widely used in food and pharmaceutical industries. Melanoidins, which get in water bodies with wastewater of plants, pollute them, which subsequently can have a negative impact on the population health. Wastewater treatment of plants is an important condition to preserve the integrity of aquatic ecosystems. Sorption filtration is the most effective way of removing organic substances among the methods, used for wastewater treatment. To study the adsorption kinetics, the carbonic sorbents of the brands ABG and Purolat-Standard were used, which differ with a raw material, a surface chemistry state and a porous structure. The study of the adsorption kinetics allows to determine the mechanism of mass transfer in the system adsorbent-adsorbate and to obtain the parameters, necessary for engineering evaluation of adsorption processes in practice. It is shown that the time of reaching equilibrium in the sorption system varies in the range of 150-250 minutes. The degree of reaching the adsorption equilibrium () and the dimensionless kinetic parameters T have been calculated, which are proportional to the time of the process (t). It is found that the melanoidin adsorption rate is controlled by external mass transfer, necessary for calculation of optimum parameters and modes of the adsorption process. Experimental research allows to determine that the granules of the used carbonic sorbents interact with the dissolved substance in the full volume and throughout the particle is in the reaction zone; such interaction relates to a quasi-homogeneous model. It is shown that at the melanoidin adsorption, the rate of the internal diffusive mass transfer depends on the porous structure of the carbonic adsorbents. A high value of the external mass transfer coefficient for the carbonic sorbent Purolat-Standard suggests a high degree of melanoidin extraction from aqueous solutions.
Melanoidin, kinetics, adsorption, active carbon
1. Selemenev V.F., Rudakov G.V., Slavinskaya N.V., and Drozdova O.B. Pigmenty pishchevykh proizvodstv (melanoidiny) [Pigments Used in Food Production (Melanoidins)]. Moscow: DeLi Publ., 2008. 246 p.
2. Khachaturyan E.E., Gvasaliya T.S., and Yakimenko T.P. Dvesti sostavlyajushchikh reaktcii melanoidinoobrazovaniya [Two hundred components of the reaction of melanoidin formation]. Sovremennaya nauka i innovatsii [Modern science and innovations], 2014, no. 4, pp. 22-32.
3. Krasnova T.A., GoraN.V., and Golubeva N.S. Beer quality assurance by controlling wort polyphenolic content with adsorption method. Foods and Raw Materials, 2016, vol. 4, no. 1, pp. 36-43. DOI:https://doi.org/10.21179/2308-4057-2016-1-36-43.
4. Ruckenstein E. and Berim G.O. Effect of solute-solute and solute-solvent interactions on the kinetics of nucleation in liquids. Journal of colloid and interface science, 2010, vol. 342, no. 2, pp. 528-532. DOI:https://doi.org/10.1016/j.jcis.2009.10.039.
5. Koganovskiy A.M., Klimenko N.A., Levchenko T.M., and Roda I.G. Adsorbtsiya organicheskikh veshchestv iz vody [Adsorption of organic substances from water]. St. Petersburg: Khimiya Publ., 1990. 256 p.
6. Adamson A.W. and Gast A.P. Physical chemistry of surface. New York: A winey - interscience publication, 1997. 784 p.
7. Pet'kov V.I. and Koryttseva A.K. Khimicheskie reaktory: elektronnoe uchebno-metodicheskoe posobie [Chemical reactors: electronic study guide]. Nizhniy Novgorod: UNN Publ., 2012, 71 p.
8. Yagodovskiy V.D. Adsorbtsiya [Adsorption]. Moscow: BINOM. Laboratoriya znaniy Publ., 2015. 216 p.
9. Karnaukhov A.P. Adsorbtsiya, tekstura dispersnykh i poristykh materialov [Adsorption, texture of disperse and porous materials]. Novosibirsk: Nauka, Siberian Branch of the Russian Academy of Sciencies Publ., 1999. 456 p.
10. Keller J.U. Gas adsorption equllibria: experimental methods and adsorptive isotherms. New York: Springer Science and Business Media, 2005. 422 p.
11. Parfitt G.D. Adsorption from solution at the solid. New York: Academic press, 1993. 488 p.
12. Krasnova T.A., Timoshchuk I.V., and Kirsanov M.P. Kinetika adsorbtsii smesej organicheskikh veshchestv iz vodnykh rastvorov aktivnymi uglyami [Kinetics of organic substances mixture adsorption from aqueous solutions using activated carbons]. Voda, khimiya i ekologia [Water, Chemistry and Ecology], 2014, no. 7, pp. 69-74.
13. Kuprin V.P. and Shcherbakov A.B. Adsorbtsiya organicheskikh soedinenij na poverkhnosti [Adsorption of organic compounds on surface]. Kiev: Naukova-dumka Publ., 1996. 142 p.
14. Adamova L.V. and Safronov A.P. Sorbcionnyy metod issledovaniya poristoy struktury nanomaterialov i udel'noy poverkhnosti nanorazmernykh sistem [Sorption method of study of porous structure of nanomaterials and of specific surface of nanosized systems]. Ekaterinburg: Gor’kiy Ural State University Publ., 2008. 324 p.
15. Verteletskaya N.Yu., Levchenko L.M., and Shavinskiy B.M. Fiziko-khimicheskoe issledovanye kamennykh ugley [Physicochemical study of carbons]. Vestnik KemGu [Bulletin of Kemerovo State University], 2013, vol. 3, no. 3, pp. 61-65.
16. Krasnova T.A., Zhulina K.V., and Golubeva N.S. Issledovanie adsorbtsii melanoidina na uglerodnykh sorbentakh [Study of melanoidin adsorption on carbon sorbents]. Izvestiya vuzov. Pishchevaya tekhnologiya [News of Institutes of Higher Education. Food Technology], 2017, no. 1, pp. 51-54.