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Author: search.filters.author.Taweekarn, TaraweeSubject: search.filters.subject.batch adsorption

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    Item type:Publication,
    Starch Biocryogel for Removal of Methylene Blue by Batch Adsorption
    (2022-12-01)
    Taweekarn, Tarawee
    ;
    Wongniramaikul, Worawit
    ;
    Boonkanon, Chanita
    ;
    Phanrit, Chonthicha
    ;
    Sriprom, Wilasinee
    A green monolithic starch cryogel was prepared and applied for the removal of methylene blue (MB) using a batch system. The influence of various experimental parameters on MB adsorption was investigated. High removal efficiency (81.58 ± 0.59%) and adsorption capacity (34.84 mg g<sup>−1</sup>) were achieved. The Langmuir model better fitted the experimental data (determination coefficient (R<sup>2</sup>) = 0.9838) than the Freundlich one (R<sup>2</sup> = 0.8542), while the kinetics of MB adsorption on the cryogel followed a pseudo-second-order model. The adsorption process was spontaneous and endothermic with an activation energy of 37.8 kJ mol<sup>−1</sup> that indicated physical adsorption. The starch cryogel was used for MB removal from a wastewater sample collected from a local Batik production community enterprise in Phuket, Thailand, and a removal efficiency of 75.6% was achieved, indicating that it has a high potential as a green adsorbent for MB removal.
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