Adsorption Isotherms and Kinetic Studies of Methylene Blue Removal by Jatropha curcas Seeds
DOI:
https://doi.org/10.11113/bioprocessing.v5n1.78Keywords:
Adsorption Isotherms, Kinetic, Methylene blue, Jatropha curcas seedsAbstract
This study investigates the potential of Jatropha curcas seed as a low-cost biosorbent for the removal of methylene blue (MB) from aqueous solutions. The biosorbent was prepared through drying, grinding, and sieving processes, followed by characterization using Scanning Electron Microscopy (SEM) and Fourier Transform Infrared (FTIR) spectroscopy. Batch adsorption experiments were conducted to evaluate the effects of initial dye concentration, pH, adsorbent dosage, and contact time. The optimum conditions were identified at pH 11, initial concentration of 50 mg/L, and adsorbent dosage of 1.0 g, achieving a maximum removal efficiency of 77.15% and adsorption capacity of 6.17 mg/g. The adsorption process was best described by the Langmuir isotherm and pseudo-second-order kinetic model, indicating monolayer adsorption and chemisorption mechanism. The findings demonstrate that Jatropha curcas seeds are a promising sustainable biosorbent for wastewater treatment applications.
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