Remediation of uranium with treated neem (Azadirachta indica) bark from environmental waters

Use of biomaterials is cost-effective and eco-friendly process with minimal waste generation, making it a sustainable alternative for metal remediation.The present study emphasizes the remediation of uranium using treated neem bark (TNB). TNB has been investigated for uranium sorption and parameters, such as pH, initial uranium concentration, equilibration time and temperature were optimized. The experimental results were evaluated for sorption kinetics and mechanism. It follows a pseudo second-order kinetics and Langmuir model of isotherm indicating monolayer sorption. The maximum sorption capacity at a pH 7.0 and temperature 27 °C for the remediation of uranium using TNB was 10.42 mg g⁻¹.