Reductive and adsorptive elimination of U(VI) ions in aqueous solution by SFeS@Biochar composites

• Published in: Environmental science and pollution research international Vol. 28; no. 39; pp. 55176 - 55185
• Main Authors: Liu, Renrong, Wang, Hai, Han, Li, Hu, Baowei, Qiu, Muqing
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.10.2021; Springer Nature B.V
• Subjects: Adsorbents; Adsorption; Adsorptivity; Aquatic Pollution; Aqueous solutions; Atmospheric Protection/Air Quality Control/Air Pollution; biochar; Carbon; Charcoal; Chemical elements; Chemical precipitation; Composite materials; Earth and Environmental Science; Ecotoxicology; electrostatic interactions; Environment; Environmental Chemistry; Environmental Health; Environmental science; Functional groups; Iron sulfides; Nanomaterials; Nanoparticles; nitrogen; peanut hulls; Peanuts; Reaction mechanisms; Research Article; Starch; sulfides; Surface chemistry; Uranium; Waste Water Technology; Water Management; Water Pollution Control; X ray photoelectron spectroscopy; U(VI); Biochar; Starch; Nanoscale ferrous sulfide
• ISSN: 0944-1344; 1614-7499; 1614-7499
• DOI: 10.1007/s11356-021-14835-0

The novel biochar supported by starch and nanoscale iron sulfide (SFeS@Biochar) composites were successfully prepared through coupling of biochar derived from peanut shell with nanoscale ferrous sulfide and starch under nitrogen atmosphere. It had the advantages of biochar, starch, and nanoscale ferrous sulfide. Therefore, it could overcome some shortcomings. The nanoscale ferrous sulfide particles and starch were thought to be loaded successfully on the surface of the biochar by SEM, EDS, BET, XRD, FT-IR, and XPS techniques. High uptake capacity of U(VI) by SFeS@Biochar could be attributed to reactive reaction of FeS nanoparticles and adsorptive of a lot of functional groups. The proposed reaction mechanisms of the U(VI) uptake by SFeS@Biochar were electrostatic attraction, surface complexation, precipitation, and reductive reaction. It also might be an improved environmentally friendly material for U(VI) removal.