Ultimate Resourcization of Waste: Crab Shell-Derived Biochar for Antimony Removal and Sequential Utilization as an Anode for a Li-Ion Battery

Abstract

The development of high-capacity adsorbents is pivotal for the removal of antimonite (Sb­(III)) and antimonate (Sb­(V)) as priority pollutants in water. Herein, a Fe-La-doped biomass carbon adsorbent (Cs/Fe-La) was prepared for efficient removal of both Sb­(III) and Sb­(V). Cs/Fe-La shows excellent adsorption behavior for both Sb­(III) and Sb­(V) at 40 °C with a maximum capacity of 498 and 337 mg/g, respectively. Additionally, the antimony adsorption mechanism and the contribution of Cs/Fe-La composition to high capacity were analyzed based on the characterization of physicochemical analysis and adsorption studies, and the pseudo-second-order kinetic model as well as the Langmuir model fit the results well. Remarkably, considering the secondary pollution caused by direct disposal of antimony-containing waste adsorbents, an antimony-enriched waste adsorbent (Cs/Fe-La-SbO x ) was used as an anode material for a Li-ion battery. The heat-treated waste adsorbent exhibited good cycling performance with a reversible specific capacity of 833.8 mAh/g after 500 cycles. This work has demonstrated a promising pathway that can achieve the removal and sustainable utilization of antimony simultaneously by minimizing antimony contamination and maximizing the recycling of antimony-enriched adsorbents.

A dog nose-inspired high-performance NH3 gas sensor of biomass carbon materials with a pleated structure derived from rose tea

“…The peaks at 1566 cm À1 for CRT are attributed to C]C vibrations and the peaks at 1028 cm À1 for ORT and CRT are attributed to C-O vibrations. 28,29 It is noteworthy to mention that the intensity of the functional group for the CRT is signicantly weaker compared to that of ORT. The main reason may be that the hydroxyl and hydrogen bonds between the cellulose chains were broken at the elevated temperatures, forming the graphitized structure with high number of defects.…”

“…The uniform distribution of C, O and K elements on the surface of the pleated structure indicates that each active site can fully play its role. 29 The composition and chemical state of the elements on the surface of CRT were further determined by X-ray photoelectron spectroscopy (XPS). Fig.…”

“…3d), corresponding to oxygen vacancy (O V , 530.9 eV), chemisorbed and dissociated oxygen (O C , 532.1 eV) and the C-O/C]O (533.8/533.2 eV) group. 29,37 The highresolution spectra of K 2p of CRT are shown in Fig. 3e.…”

“…The uniform distribution of C, O and K elements on the surface of the pleated structure indicates that each active site can fully play its role. 29…”

Direct sulfhydryl ligand derived UiO-66 for the removal of aqueous mercury and its subsequent application as a catalyst for transfer vinylation

“…This development suggests a sustainable way for Hg 2+ treatment, which can not only realize the resourcization of heavy metal mercury, but also avoid the possible secondary pollution caused by the waste adsorbents. 31,32…”