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

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^-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 S

SUBMITTER: Rungrattanachai C 

PROVIDER: S-EPMC12547595 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature