Valorization of Pineapple Leaf Waste for Methylene Blue Adsorption: A Comparative Study of Natural and Modified Adsorbents
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Issued Date
2025-10-21
Resource Type
eISSN
24701343
Scopus ID
2-s2.0-105019090062
Journal Title
ACS Omega
Volume
10
Issue
41
Start Page
48711
End Page
48722
Rights Holder(s)
SCOPUS
Bibliographic Citation
ACS Omega Vol.10 No.41 (2025) , 48711-48722
Suggested Citation
Rungrattanachai C., Amornsakchai T., Amornsakchai P. Valorization of Pineapple Leaf Waste for Methylene Blue Adsorption: A Comparative Study of Natural and Modified Adsorbents. ACS Omega Vol.10 No.41 (2025) , 48711-48722. 48722. doi:10.1021/acsomega.5c06723 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/112755
Title
Valorization of Pineapple Leaf Waste for Methylene Blue Adsorption: A Comparative Study of Natural and Modified Adsorbents
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Author's Affiliation
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Abstract
Synthetic dyes like methylene blue (MB) are widely used in textiles and pharmaceuticals but pose environmental risks when discharged into wastewater. This study evaluates pineapple leaf biomass as a low-cost, biodegradable adsorbent for MB removal. Four materials─raw fiber (PALF), nonfibrous material (NFM), alkali-treated microfibers (PALMF), and ultrasonically treated PALMF (Ultra_PALMF)─were prepared and characterized. PALF achieved the highest adsorption capacity (53.93 mg g<sup>–1</sup>), while NFM showed excellent reusability, retaining >96% efficiency after three cycles. Nonlinear kinetic analysis indicated that adsorption generally followed the pseudo-second-order model, though PALF was better described by the pseudo-first-order model. Equilibrium data were best represented by the Sips model, confirming the heterogeneous nature of the adsorption sites. Thermodynamic analysis confirmed a spontaneous, exothermic process. These findings highlight pineapple leaf waste as a sustainable alternative for dye removal, with NFM offering strong potential for practical reuse.