Su Y, Boehm W, Wenzel M, Paasch S, Acker M, Doert T, Brunner E, Henle T, Weigand JJ (2020)
Publication Type: Journal article
Publication year: 2020
Book Volume: 10
Pages Range: 45116-45129
Journal Issue: 73
DOI: 10.1039/d0ra08164g
The increasing concerns on uranium and rare earth metal ion pollution in the environment require sustainable strategies to remove them from wastewater. The present study reports an eco-friendly approach to convert a kind of protein-rich biomass, brewer's spent grain (BSG), into effective biosorbents for uranyl and rare earth metal ions. The employed method reduces the energy consumption by performing the hydrothermal treatment at a significantly lower temperature (150 °C) than conventional hydrothermal carbonization. In addition, with the aid of the Maillard reaction between carbohydrates and proteins forming melanoidins, further activation processes are not required. Treatment at 150 °C for 16 h results in an altered biosorbent (ABSG) with increased content of carboxyl groups (1.46 mmol g-1) and a maximum adsorption capacity for La3+, Eu3+, Yb3+ (pH = 5.7) and UO22+ (pH = 4.7) of 38, 68, 46 and 221 mg g-1, respectively. Various characterization methods such as FT-IR, 13C CP/MAS NMR, SEM-EDX and STA-GC-MS analysis were performed to characterize the obtained material and to disclose the adsorption mechanisms. Aside from oxygen-containing functional groups, nitrogen-containing functional groups also contribute to the adsorption. These results strongly indicate that mild hydrothermal treatment of BSG could be applied as a greener, low-cost method to produce effective adsorbents for uranyl and rare earth metal ion removal.
APA:
Su, Y., Boehm, W., Wenzel, M., Paasch, S., Acker, M., Doert, T.,... Weigand, J.J. (2020). Mild hydrothermally treated brewer's spent grain for efficient removal of uranyl and rare earth metal ions. RSC Advances, 10(73), 45116-45129. https://doi.org/10.1039/d0ra08164g
MLA:
Su, Yi, et al. "Mild hydrothermally treated brewer's spent grain for efficient removal of uranyl and rare earth metal ions." RSC Advances 10.73 (2020): 45116-45129.
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