Removal of methyl violet from aqueous solutions by green synthesized magnetite nanoparticles with Parkia Speciosa Hassk. peel extracts.

Magnetic nanoparticle synthesis from petai peel extract (Parkia speciossa Hassk.) by the coprecipitation method and its application for methyl violet dye adsorption has been studied. Magnetic MNPS-PT was characterized based on FTIR and XRD instruments and also analyzed for the effect of a pH dye solution on MNPs-PT. This study successfully synthesized MNPs-PT, as indicated by the FTIR spectrum of the Fe-O magnetic core band at 562.08 cm-1 and the XRD peak diffractograms according to the JCPDS standard #19-0629. The kinetics and isotherms of adsorption of MNPs-PT were analyzed using Lagergren's pseudo-first-order (PFO) and Ho's pseudo-second-order (PSO) kinetics, Langmuir's and Freundlich's isotherms. The adsorption processes of MNPs-PT follow Ho's (PSO) kinetic and Freundlich's isotherm models. The optimum adsorption for MV onto MNPs-PT is at pH 4, 120 min, and 12 mg/L with 94.84% adsorbed. The result showed the potential of MNPs-PT as an adsorbent for methyl violet dye.