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Production and optimization of activated carbon from plant waste with high specific surface area for moisture-saving applications in agriculture
Автор(ы)
Yerlan Doszhanov
Karina Saurykova
Zulkhair Aimukhametovich Mansurov
Ospan Doszhanov
Дата публикации
20 октября 2024 г.
Тип
journal article
Журнал
Том
22
Выпуск
3
Первая страница
159
Последняя страница
167
ISSN
1683-3902
Аннотация
In conditions of water shortage, sustainable agricultural development requires the use of water-saving technologies, including the use of water-retaining substrates based on activated carbon. In this work, the textural and adsorption characteristics of activated carbon obtained from plant waste were studied at different mass ratios of the sorbent and KOH (1:1, 1:2, 1:3 and 1:4). The aim of the study was to determine the optimal activation conditions for creating a material with a high specific surface area and a developed porous structure. The results showed that the largest pore volume (1.6 cm3/g) and a high degree of microporosity are achieved at a ratio of 1:3, which is confirmed by the analysis of pore distribution using the DFT and BJH methods. FTIR spectroscopy revealed the presence of functional groups (O–H, C=O and C–O) that contribute to water conservation. The differential pore volume distribution (dv(r), cm3/Å/g) also demonstrated that at a ratio of sorbent and KOH (1:3), the sample structure optimally combines micropores and mesopores, which increases the adsorption capacity of carbon.
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