Magnetically Modified Waste Bark of Aegle marmelos Tree as a Promising Biosorbent for Uranium(VI) Sorption

Magnetically modified waste bark of the Aegle marmelos tree was prepared by using green synthesis method and was used in a batch system for U(VI) removal from aqueous solution. The biosorbent was characterized by FTIR, XRD, SEM, and EDS. Optimum process parameters were determined: pH 7.00, initial U(VI) concentration 25 mg/L, biosorbent dose 0.04 g, contact time 40 min, and temperature 30 degrees C. Under these conditions, the removal efficiency is 91.6%. Good agreement was found with the Langmuir and Temkin isotherm models. Pseudo-second-order model (r(2) = 0.999) ensures the best fit of the experimental results. Thermodynamic analysis shows that the adsorption process at the optimum temperature is spontaneous: Delta G degrees = -29.24 kJ/mol.

Automated summary

In this study, magnetically modified waste bark from the Aegle marmelos tree was used as a biosorbent for U(VI) removal from aqueous solution using a green synthesis method. The biosorbent was characterized and optimal process parameters were determined. The results showed a high removal efficiency of 91.6% for U(VI) under the optimum conditions. Thermodynamic analysis indicated that the adsorption process was spontaneous at the optimal temperature.