Add time:08/21/2019         Source:sciencedirect.com

Biochar adsorption has been protruded as a sustainable green and economic process for water remediation. This technology is facing high challenges in removing different pollutants, owning to the stable chemical and physical features of biochar. Therefore, a novel nanocomposite of Liquidambar styraciflua fruit biochar-crosslinked-nanosilica (BC-Gl-NSi) was synthesized and characterized (surface area = 60.754 m2 g−1 and particle size = 17.32–36.25 nm). The designed BC-Gl-NSi nanocomposite was explored for removal of uranyl ions by the batch adsorption technique under the influence of different factors including temperature, contact time, nanocomposite dosage, pH, uranyl ion concentration as well as co-existing ions. The adsorption process was principally confirmed to rely on the solution pH and reached 86.3% in pH 4.0. The results showed also that one-minute contact duration was sufficient to reach the maximum extraction of uranyl (30.0 mg L−1). Besides, [BC-Gl-NSi] exhibited excellent selectivity and good recovery of uranyl ions with other competing ions.

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