Загрузка...
Use of Urea-Modified Activated Carbon Sorbents Derived from Plant Residues for Gas Sorption
Автор(ы)
Almagul Kerimkulova
Yersultan Yermoldanov
Leticia Fernández Velasco
Nazym Asanbek
Aisamal Kubaiden
Assem Zhumagaliyeva
Zulkhair Mansurov
Gulnur Nysanbayeva
Vadim Yermolenko
Ospan Doszhanov
Дата публикации
7 июля 2026 г.
Тип
journal article
Издатель
Multidisciplinary Digital Publishing Institute
Журнал
Том
16
Выпуск
13
Первая страница
6812
Последняя страница
6812
ISSN
2076-3417
Аннотация
The growing demand for efficient and sustainable materials for air purification has stimulated interest in activated carbons derived from renewable biomass resources. In this study, activated carbons were prepared from rice husk, wheat straw, sawdust, and walnut shells and systematically investigated as sorbents for toxic gases and volatile organic compounds. The materials were characterized using nitrogen and water vapour sorption isotherms, scanning electron microscopy, thermogravimetric analysis, Fourier-transform infrared spectroscopy, and energy-dispersive X-ray analysis to evaluate their textural properties, morphology, thermal stability, and surface chemistry. The results showed that the precursor type strongly influences the pore structure and functional group composition of the activated carbons. Wheat straw and Rice husk–derived activated carbons exhibited the highest total pore volume and a well-developed porous structure, together with a high content of oxygen- and silicon-containing elements. Gas breakthrough experiments with different probes showed that wheat straw–derived activated carbon excels in VOC removal due to its highly microporous structure. In contrast, rice husk–derived activated carbon displays strong affinity toward inorganic gases such as NH₃ and, after urea modification, achieves enhanced performance for SO₂. These results underscore the versatility and practical applicability of carbon materials obtained from plant residues.
Области науки (FoS)