Activation of Prosopis juliflora Pods for Malachite Green Removal
The study examines activated carbon (AC) derived from Prosopis juliflora pods for removing Malachite Green dye, achieving a maximum adsorption of 136.43 mg/g. This research highlights the potential of biomass-derived materials in wastewater treatment applications.
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Activated carbon (AC) was synthesized from Prosopis juliflora pods using NaOH-assisted activation. The resulting material exhibited a high surface area of 1710.2 m²/g with heterogeneous morphology. Adsorption experiments indicated that equilibrium was achieved around 210 minutes, with a maximum Malachite Green (MG) removal capacity of 136.43 mg/g across a concentration range of 50-300 ppm.
Performance was pH-dependent, showing poor results at pH 3, but effective removal in the pH range of 4-10. The adsorption data aligned well with the Langmuir isotherm model and followed a pseudo-second-order kinetic model.
Mechanistic studies suggested that adsorption involved electrostatic attraction, hydrogen bonding, and π-π interactions. The AC demonstrated reusability for up to four cycles, indicating its potential as a sustainable solution for dye-contaminated wastewater.
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