Work

Valorization of Pineapple Leaf Waste for Methylene Blue Adsorption: A Comparative Study of Natural and Modified Adsorbents

Year: 2025

Type: article

Abstract: High Resolution Image Download MS PowerPoint Slide 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 –1 ), 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.

Source: ACS Omega

DOI: 10.1021/acsomega.5c06723

Authors: Chayanit Rungrattanachai, Taweechai Amornsakchai, Pornsawan Amornsakchai

Institutions: Mahidol University, Rajamangala University of Technology Rattanakosin

Language: English

Topic: Adsorption and biosorption for pollutant removal

Subfield: Water Science and Technology

Field: Environmental Science

Domain: Physical Sciences

SDGs: Responsible consumption and production, Clean water and sanitation

Open Access status: gold

Estimated APC paid: $1,935