Features of sorption of hydroxybenzaldehydes from aqueous solutions by activated carbon VSK-400
Abstract
Activated carbons (AC) are traditional adsorbents used in various fields of industry for the purification of gas and liquid media. Currently, the use of AC obtained not only from hardwoods, but also from other sources, for example, coconut shells, is of interest. The aim of the work was to establish the sorption characteristics of activated carbon VSK-400 (ENPO "Inorganic") relative to some representatives of substituted benzaldehydes. The studies were carried out under static and dynamic conditions. Comparison of the isotherms of the sorption of para-hydroxybenzaldehyde (PGBA), vanillin and isovanillin indicates a greater selectivity of VSK-400 to an aldehyde that does not contain an ether group in its structure. The presence of a methoxy group in the structure of the sorbents under consideration and its location relative to the carbonyl group affects the capacity characteristics of the AC. The sorption of aldehydes in the series – PGBA, isovanillin, vanillin – decreases.
The effect of the pH and temperature of the medium on the sorption of hydroxybenzaldehydes is estimated. It was noted that in acidic environments and in the high temperature range, the sorption of vanillin increased. Under dynamic conditions, there was also an increase in the working capacity to a slip with an increase in the temperature of the solution passed through the column. Thus, the paper evaluates the influence of external conditions on the capacity of activated carbon VSK-400 relative to a number of hydroxybenzaldehydes, and also considers the possibility of practical application of the sorbent for the extraction of PGBA, vanillin and isovanilline.
Downloads
References
Mukhin V.M., Kurilkin A.A., Voropaeva N.L., Leksyukova K.V., Uchanov P.V. A position of active carbons in the ecology and economy, new technologies of their production. Sorbtsionnye I Khromatograficheskie Protsessy. 2016; 16(3): 346-353. (In Russ.)
Yur'ev Yu.L. Tendencii razvitiya proizvodstva aktivnyh uglej. Lesa Rossii i hozyajstvo v nih. 2016; 2 (57): 77-82. (In Russ.)
Rabotyagov K.V., Ratushnaya A.D., Bahtin A.S. Sravnenie sorbcionnoj aktivnosti razlichnyh aktivnyh uglej. Uchenye zapiski Krymskogo federal'nogo universiteta imeni V. I. Vernadskogo. Biologiya. Himiya. 2022; 8(1): 224-235. (In Russ.)
Kim D-G., Boldbaatar S., Ko S-O. Enhanced Adsorption of Tetracycline by Thermal Modification of Coconut Shell-Based Activated Carbon. International Journal of Environmental Research and Public Health. 2022; 19(21): 13741. https://doi.org/10.3390/ijerph192113741
Brahma D., Nath H., Borah D., Debnath M., Saikia H. Coconut Husk Ash Fabricated Coal-Layered Double Hydrox-ide Composite for the Enhanced Sorption of Malachite Green Dye: Isotherm, kinetics and thermodynamic studies. Inorganic Chemistry Communications. 2022; 144: 109878. https://doi.org/10.1016/j.inoche.2022.109878
Dada A.O., Ojediran J.O., Olalekan A.P. Sorption of from Aqueous Solution unto Modified Rice Husk: Isotherms Studies. Advances in Physical Chemistry. 2013; 2013: Article ID 842425. https://doi.org/10.1155/2013/842425
Aktivnyj ugol' VSK-400. https://neorganika.ru/produktsiya/aktivnye-ugli/9-produktsiya/18-aktivnyj-ugol-vsk-400 Elektronnyj resurs. (data obrashcheni-ya 2.09.2022)
Velichkina N.S. Sorbcionnaya tekhnologiya regeneracii ioda iz sbrosnyh matochnyh rastvorov i gazovyh potokov pri iodidnom rafinirovanii cirkoniya : avtoref. kand. diss, M., 2016. 18 p. (In Russ.)
Himicheskaya enciklopediya : V 5t. : T.1. Red-kol. : I. L. Knunyanc et al. M., Sov. enciklop. 1988. 623 p. (In Russ.)
Sviridova E.S., Voronyuk I.V., Eliseeva T.V., Selemenev V.F., Muhin V.M. Sravnenie sorbcii 4-gidroksibenzal'degida aktivirovannymi ug-lyami razlichnyh marok v staticheskih usloviyah, Sorbtsionnye i khromatograficheskie protsessy. 2022; 22(1): 50-57. https://doi.org/10.17308/sorpchrom.2022.22/9020
Adsorbciya iz rastvorov na pover-hnosti tverdyh tel / Red. G. Parfit, K. Rochester. M. Mir. 1986. 488 s. (In Russ.)
