Eiad-Ua, Apiluck

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Eiad-Ua, Apiluck
Alternative Name
Eiad-ua, Apiluck
Eiad-Ua, A.
Eiadua, A.
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Email
apiluck.ei@kmitl.ac.th

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    Solid shrimp waste derived nanoporous carbon as an alternative bio-sorbent for oxytetracycline removal from aquaculture wastewater
    (2024-06-15)
    Kaewtrakulchai, Napat
    ;
    Samattakarn, Nippit
    ;
    Chanpee, Sirayu
    ;
    Assawasaengrat, Pornsawan
    ;
    Manatura, Kanit
    Recently, it has been critical to effectively remove oxytetracycline (OTC) from aquaculture wastewater before releasing into the environment. The adsorption process is recognized as an efficient pathway for removing OTC since it is a simple, stable, and cost-effective method. This study aims to develop nanoporous carbon entirely from shrimp waste (SW) via hydrothermal carbonization assisted with KOH activation. Existing KOH significantly increases the porosity of SW nanoporous carbon. The optimal SW porous carbon was obtained using 5 wt%KOH for activation, which had the largest surface area of 679.51 m<sup>2</sup>/g with the total pore volume of 0.458 cm<sup>3</sup>/g. Moreover, the SW porous carbon with the highest porosity was selected for the OTC adsorption. The Langmuir isotherm model and the pseudo-second-order kinetic model match the experimental data, implying that the adsorption mechanism is mono-layered adsorption due to micropores by chemisorption interaction. The adsorption capacity significantly improved by increasing the dosage of SW nanoporous carbon. The SW nanoporous carbon adsorption for OTC is primarily regulated by pore filling affected by hydrogen bonding, and π-π* interaction also plays a significant role. The SW nanoporous carbon showed an efficient OTC adsorption after 5 regeneration cycles. This work demonstrates biomass waste recycling and emphasizes the potential of aquatic food processing waste-derived nanoporous carbon for antibiotic adsorption.
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    Novel magnetically interconnected micro/macroporous structure of monolithic porous carbon adsorbent derived from sodium alginate and wasted black liquor and its adsorption performance
    (2021-01-01)
    Onsri, Parichart
    ;
    Dechtrirat, Decha
    ;
    Nooeaid, Patcharakamon
    ;
    Eiad-Ua, Apiluck
    ;
    Amornpitoksuk, Pongsaton
    The novel and facile preparation of magnetically interconnected micro/macroporous structure of monolithic porous carbon adsorbent (MPCA) were designed and presented herein. The synthesis was achieved via conventional freeze-drying and pyrolysis processes. In this study, sodium alginate and wasted black liquor were employed as starting pre-cursors. Sodium alginate acts as a template of materials, whereas black liquor, the wasted product from the paper industry with plentiful of lignin content and alkaline solution, played an essential role in the reinforcement and activation of porosity for the resulting materials. Moreover, both the precursors were well dissolved in Fe<sup>3+</sup> solution, providing a simple addition of a magnetic source in a one-pot synthesis. The interconnected micro/macroporous structures were generated through freeze-drying and, subsequently the pyrolysis process. The obtained cylindrical-shaped monolithic porous carbon adsorbent (MPCA-700) showed high mechanical stability, a high BET specific surface area (902 m<sup>2</sup>/g). Such aforementioned features were considered suitable to make the synthesized monolith as an adsorbent for the removal of heavy metal ions. The maximum adsorption capacity of MPCA-700 towards Pb<sup>2+</sup> ions was 76.34 mg/g at pH 5. The adsorption studies illustrated that adsorption kinetics and isotherm perfectly fitted with the pseudo-second-order kinetics model and Langmuir isotherm, respectively. This work presents a promising pro-tocol to reduce the overall costs in the preparation of renewable adsorbents with good adsorption efficiency and regeneration.
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    High performance nanoporous carbon from mulberry leaves (Morus alba L.) residues via microwave treatment assisted hydrothermal-carbonization for methyl orange adsorption: Kinetic, equilibrium and thermodynamic studies
    (2022-03-01)
    Siraorarnroj, Siwat
    ;
    Kaewtrakulchai, Napat
    ;
    Fuji, Masayoshi
    ;
    Eiad-ua, Apiluck
    High performance nanoporous carbons were directly prepared from mulberry leaves (Morus alba L.) residues by the hydrothermal-carbonization with chemical reagent combined the microwave-assisted treatment. The as-purified ML porous carbon (MPC) was successfully applied for the adsorption of methyl orange, which is one of crucial waste-water pollutants left from an industrial sector. The MPC sample obtained from the hydrothermal process (200 °C, 12 h) using an activation of 15 wt% NaOH (700 °C, 2 h), and combined with microwave treatment at 700 W for 6 min, specifically exhibited micropores and mesopores in the MPC morphological structure. Accordingly, the highest S<inf>BET</inf> was approximately 791.79 m<sup>2</sup>/g with the total pore volume of 0.495 cm<sup>3</sup>/g. Moreover, the adsorption performance test of MPC was conducted by the shaking unit using 100 ppm methyl orange concentration. The MPC showed the highest methyl orange-adsorption uptake of 99% at 30 °C under an ambient pressure (1 atm). The development of mulberry leaves (Morus alba L.) residues into porous carbon exhibited a great attention for dyes adsorption with a rapid adsorption kinetic, and excellent adsorption capacity, which are a promising-characteristics for practical waste-water adsorption experiments.