Mg/Al-chitosan as a Selective Adsorbent in The Removal of Methylene Blue from Aqueous Solutions

The use of dyes in the textile industry is detrimental to aquatic biota and humans. Pollution caused by dye waste can be overcome adsorption methods using adsorbents such as LDH. LDH known an adsorbent that often found process removing waste, but repeated not effective. This modification a supporting material chitosan. Modification done coprecipitation or precipitation simultaneously at pH 10. XRD analysis where peaks appear Mg/Al-chitosan are similar typical constituent materials, namely Mg/Al confirmed FTIR spectrum appears As well BET there increase surface area after being modified from 5.845 m2/g 24.556 m2/g. In this study, selectivity for mixture was carried out first with most selective methylene blue. Methylene blue continued processes isotherm kinetics thermodynamics regeneration studies. results showed 90 minutes reached equilibrium. capacity increased chitosan 84.746 mg/g 108.696 mg/g. follows Langmuir type occurs chemically (monolayer). Regeneration studies show used repeatedly stable effectiveness until fifth cycle.