Russian Federation
Russian Federation
Voronezh, Russian Federation
Russian Federation
The article shows the effect of alkaline activation on the sorption capacity of aluminosilicate sorbents and biochars based on sawdust of woody plants. The analysis of the sorption capacity of the original and modified samples was carried out relative to formaldehyde. The physico-chemical parameters for biochar samples and the chemical composition for aluminosilicates before and after modification were determined. The samples were modified with 2 M KOH and NaOH solutions. The effect of alkali promotes an increase in sorption on pine and poplar biochar samples by 1.4 and 1.7 times, respectively, on clinoptilolite and nontronite samples - by 1.2 and 1.6 times.
aluminosilicates, biochar, physicochemical characteristics, alkaline activation, sorption, formaldehyde
1. Valaskova M, Martynkova GS, Matejka V, Kratosova G. Chemically activated kaolinites after de-intercalation of formamide. Ceramics-silikaty. 2007; 51(1): 24–29.
2. Murray H. Applied clay mineralogy today and tomorrow. Clay Minerals. 1999; 34: 39–49. DOI: https://doi.org/10.1180/000985599546055
3. Jozefaciuk G. Effect of acid and alkali treatments on surface-charge properties of selected minerals. Clays Clay Miner. 2002; 50(5): 647–656. DOI: https://doi.org/10.1346/000986002320679378
4. Tsyganova S.I., Melnikov A.N., Korolkova I.V., Chesnokov N.V., Kuznetsov B.N. Obtaining porous carbon materials from modified ZnSl2 birch sawdust. Journal of Applied Chemistry. 2007. 80. 943-945 DOI: https://doi.org/10.1134/S1070427207060134
5. Moreno-Castilla C., Carrasco-Marin F., Lopez-Ramon M.V., Alvarez-Merino M.A. Chemical and physical activation of olive-mill waste water to produce activated carbons. Carbon. 2001. 39. 1415-1420. https://doi.org/10.1016/S0008-6223(00)00268-2 EDN: https://elibrary.ru/ANWUSL
6. Anohin, A. E. Sbor i utilizaciya for-mal'degidsoderzhaschih zhidkih stokov: obzornaya informaciya / A. E. Anohin. - M.: VNII-PIEIlesprom, 1992. - Vyp. 6. - 34 s.
7. Bel'chinskaya L.I., Khodosova N.A., Strel'nikova O.Y., Petukhova G.A., Ciganda L. Regulation of sorption processes on natural nanoporous aluminosilicates. 1. Acidic and basic modifications / Protection of Metals and Physical Chemistry of Surfaces. 2015. T. 51. № 5. S. 779-786. DOI: https://doi.org/10.1134/S2070205115050044; EDN: https://elibrary.ru/UZZIFB
8. Tomina E.V., Hodosova N.A., Lukin A.N. Corbcionno-poverhnostnye harakteristiki modificirovannogo biouglya, poluchennogo pri karbonizacii opilok sosny / Sorbcionnye i hromatograficheskie processy. 2022. T. 22. № 4. S. 442-452. DOI: https://doi.org/10.17308/sorpchrom.2022.22/10600; EDN: https://elibrary.ru/HGRUCJ
