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  • 1.
    Foorginezhad, S.
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.
    Zerafat, M. M.
    Faculty of Advanced Technologies, Nano-Chemical Engineering Department, Shiraz University, Shiraz, 71348-51154, Iran.
    Asadnia, M.
    School of Engineering, Macquarie University, Sydney, New South Wales, 2109, Australia.
    Rezvannasab, Gh
    Faculty of Advanced Technologies, Nano-Chemical Engineering Department, Shiraz University, Shiraz, 71348-51154, Iran.
    Activated porous carbon derived from sawdust for CO2 capture2024In: Materials Chemistry and Physics, ISSN 0254-0584, E-ISSN 1879-3312, Vol. 317, article id 129177Article in journal (Refereed)
    Abstract [en]

    Mitigation of greenhouse gas emissions, especially CO2, highlights the critical demand for efficient CO2 capture technologies. This is due to their essential role in climate change and their profound impact on global ecosystems and human well-being. Activated carbons have emerged as promising candidates for CO2 capture due to their availability, cost-effectiveness, and tunable properties. In this study, activated carbons were synthesized from sawdust carbonized at various temperatures within the 700–1100 °C range and subsequently activated using CO2. Comprehensive characterization was conducted through SEM, FESEM, XRD, TGA, and FTIR techniques to assess the properties. The results reveal that carbonization at 1000 °C yielded an activated carbon with a hierarchical and microporous structure, featuring surface area, pore volume, and pore size of 1651.34 m2/g, 0.69 cm³/g, and <1.76 nm, respectively. Remarkably, this activated carbon exhibited promising CO2 uptake of 9.2 mmol/g at 25 °C and 1 bar. Moreover, a remarkable recyclability over 10 cycles demonstrates its potential for practical CO2 capture applications. Furthermore, the synthesized activated carbon exhibited high selectivity for CO2 over N2 (85/15 v/v), reaching 40.2 at 1 bar and 25 °C. These findings underscore the viability of the as-prepared activated carbon as a desired candidate for efficient and selective CO2 capture, contributing to the ongoing efforts to mitigate the impact of anthropogenic CO2 emissions to the environment.

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  • 2.
    Foorginezhad, Sahar
    et al.
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science. Faculty of Advanced Technologies, Nano-Chemical Engineering Department, Shiraz University, Shiraz, 71348-51154, Iran.
    Zerafat, Mohammad Mahdi
    Faculty of Advanced Technologies, Nano-Chemical Engineering Department, Shiraz University, Shiraz, 71348-51154, Iran.
    Mohammadi, Younes
    Luleå University of Technology, Department of Engineering Sciences and Mathematics, Energy Science.
    Asadnia, Mohsen
    School of Engineering, Macquarie University, Sydney, New South Wales, 2109, Australia.
    Fabrication of tubular ceramic membranes as low-cost adsorbent using natural clay for heavy metals removal2022In: Cleaner Engineering and Technology, ISSN 2666-7908, Vol. 10, article id 100550Article in journal (Refereed)
    Abstract [en]

    Due to high toxicity and non-biodegradability, heavy metals pollution is between the major concerns of today's world. Among various techniques, membrane separation technology has taken precedence over other counterparts due to reduced separation units, low energy consumption, facile upscaling, and continuous separation. This study aims to fabricate ultrafiltration membranes made from abundant natural materials to reduce fabrication/operational costs, including precursors, sintering temperature, and filtration pressure. Moreover, SnO2/Montmorillonite nanocomposite is synthesized via the hydrothermal procedure and incorporated into the membrane matrix to decrease membrane fouling, enhance water flux, and improve heavy metals rejection rate. Results delineate 97.88–99.26%, 76.79–92.23%, and 24.97–64.74% of Cu (II), Zn (II), and Ni (II) removal from aqueous solutions in the 5–50 ppm range. An enhancement up to ∼40% is observed upon nanocomposite incorporation. Furthermore, ∼30% increase in Cu (II) removal is obtained for SnO2/MMT-incorporated membranes. Moreover, utilization of abundant natural minerals results in decreased fabrication/operational cost. Therefore, the obtained removal results and the estimated overall cost provide guidance for the large-scale utilization of low-cost membranes. As a result, the demand for heavy metals removal from wastewaters before their discharge to protect and govern the environment and implementation for agricultural purposes are fulfilled. 

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