Efficient separation of uranium from aqueous solution using sustainable biomass: an insight of adsorption isotherm and kinetics

Green biomass is significant as it is a sorbent used to remove uranium(VI) from aqueous phase. The effects of solution pH (2–10), adsorbent dose (0.01–0.3gm), retention time (5–70 min), and initial concentration (10–200 mg L−1) on the uptake of uranium(VI) were investigated. According to the Langmuir isotherm model, the maximum adsorption capacities for Amla bark were 54.945 mg L−1. Moreover, the experimental data was best suited by a pseudo-second order kinetic model (r2 = 0.993). According to the findings of the desorption investigation, employing EDTA, the first cycle of the used sorbent recovered 74.3% of its initial uranium.