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Updated: Jul 1, 2026

Removal of Trace Elements by Cupric Oxide Nanoparticles from Uranium In Situ Recovery Bleed Water and Its Effect on Cell Viability
Published on: June 21, 2015
Sustainable water treatment using oats-based nano-starch and acetylated nano-starch for uranium removal
Mahika Gulati1, Himani Sharma Saksham1, Balbir Singh Kaith1
1Smart Materials Laboratory, Department of Chemistry, Dr B R Ambedkar National Institute of Technology, Jalandhar, Punjab 144 008, India.
Abstract:
Present study aims at oats-based biosorbents for uranium sequestration. Nano-starch extracted from oats was acetylated using 10 % acetic anhydride of nano-starch. Comparative study of nano-starch and acetylated nano-starch for uranium removal was carried-out. Removal efficiencies observed was 97 % and 99 % for nano-starch and acetylated nano-starch under optimal conditions: initial U(VI) ion concentration = 30 ppb, reaction time = 30 min, temperature = 50 °C, and pH = 7.0. Optimum adsorbent dose of nano-starch was 0.75 g/25 mL and that of acetylated nano-starch was 1.00 g/25 mL. Structural and morphological analyses were carried-out using FTIR, XRD, and SEM-EDS. Nano-starch exhibited higher thermal stability with a Final Decomposition Temperature (FDT) of 620 °C. Adsorption data followed the Langmuir isotherm with adsorption capacity = 1.48 μg/g for 60 ppb initial concentration of U(VI) and pseudo-second-order kinetics (R2 = 0.99). The reusability of both biosorbents is excellent, with nano-starch retaining ~80 % efficiency and acetylated nano-starch ~84 % over five cycles, presenting an effective solution for U(VI) removal from wastewater.
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