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Author: search.filters.author.Choolaaied, OrasaSubject: search.filters.subject.Pyrolysis temperature

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    Comparative Analysis of Biochar Properties from Lemon and Kumquat Peels at Different Pyrolysis Temperatures
    (2025-01-01)
    Limmun, Wanida
    ;
    Limmun, Warunee
    ;
    Ito, Ayumi
    ;
    Choolaaied, Orasa
    ;
    Phanchindawan, Naree
    This study examines the effects of pyrolysis temperatures (500 °C and 700 °C) on the properties of biochar derived from lemon peel (LB), kumquat peel (KB), and their combination (LKB). The study analyzed the variations in biochar yield, elemental composition, and specific surface area. The results indicated that higher temperatures led to a reduction in yield but a significant improvement in specific surface area, pore volume, and carbonization, ultimately producing more stable and aromatic biochar. Additionally, LB700 and KB700 exhibited more developed pore structures and higher specific surface areas than those produced at 500 °C. Elemental analysis showed an increase in carbon content and a decrease in hydrogen content at elevated temperatures, suggesting improved biochar stability. These findings demonstrate that higher pyrolysis temperatures enhance the specific surface area and carbon content of biochar, making it more suitable for environmental applications such as soil quality improvement and pollutant adsorption. The study highlights the potential of using commonly discarded agricultural waste, such as lemon and kumquat peels, for biochar production.
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    Characterization and Application of Biochar Derived from Snake Fruit Peel for Lead Adsorption
    (2024-01-01)
    Maneesri, Wisit
    ;
    Choolaaied, Orasa
    ;
    Phanchindawan, Naree
    ;
    Ketpimol, Nopadol
    ;
    Limmun, Warunee
    Lead (Pb(II)) is a prominent contaminant in industrial wastewater, causing environmental and health risks. Traditional treatment methods often encounter limitations, including high operational costs and low efficiency in dilute solutions. This study presents an innovative, cost-effective solution utilizing biochar derived from snake fruit peels. Two biochar materials, SB500 and SB700, were produced via pyrolysis at 500 °C and 700 °C, respectively. The results indicate that the physicochemical properties of biochar change with increasing pyrolysis temperature. In addition, adsorption kinetics experiments showed that the two biochars displayed rapid adsorption within the first 60 min, with adsorption capacities of 28.08 mg/g for SB500 and 26.68 mg/g for SB700. This behavior can be attributed to a combination of physisorption and chemisorption mechanisms. These findings highlight the significance of the surface properties of biochar, especially its mesoporous structures and functional groups. Furthermore, this study suggested developing an efficient approach to mitigating the environmental and health impacts of Pb(II) contamination while addressing the issue of agricultural waste management.