The application of waste <i>Leucaena leucocephala</i> seed pods as a bio-based adsorbent for decolourization of solution

Abstract The adsorption method is widely used in water and wastewater treatment; however, most industrial adsorbents are expensive, limiting the use of developing countries. Therefore, this study aims at a biosorbent from waste Leucaena leucocephala seed pods (LLSP) apply it (as cost-effective bio-adsorbent) to remove Janus Green B dye (JGBD) solutions different values pH, agitation time, LLSP dose JGBD concentration. Different techniques were characterize before after removal, including pore size distribution, surface area (SBET) analysis, FTIR, SEM, SPM point zero charges (pHpzc) surface. results proved that could up 95% dose, concentration time 9, 0.08 g/100 ml, 50 mg/l 30 min, respectively. Langmuir Freundlich analyses applied fit data for equilibrium biosorption, was noticed isotherm model fits data, full monolayer biosorption ability 142.85 mg/g.