| Title | Multifunctional interfaces for multiple uses: Tin(II)-hydroxyapatite for reductive adsorption of Cr(VI) and its upcycling into catalyst for air protection reactions |
|---|---|
| ID_Doc | 21660 |
| Authors | Campisi, S; Leone, M; Papacchini, M; Evangelisti, C; Polito, L; Postole, G; Gervasini, A |
| Title | Multifunctional interfaces for multiple uses: Tin(II)-hydroxyapatite for reductive adsorption of Cr(VI) and its upcycling into catalyst for air protection reactions |
| Year | 2023 |
| Published | |
| Abstract | Evidence collected to date by our group has demonstrated that tin(II)-functionalized hydroxyapatites (Sn/ HAP) are a newly discovered class of ecofriendly reductive adsorbents for Cr(VI) removal from wastewaters. In this work an upgraded series of Sn/HAP materials assured a maximum removal capacity of similar to 20 mgCr/g, doubling the previously reported value for Sn/HAP materials, thanks to higher Sn-dispersion as proved by X-ray photoelectron spectroscopy and electron microscopy. Insights on kinetics and thermodynamics of the reductive adsorption process are provided and the influence of pH, dosage, and nature of Cr(VI) precursors on chromium removal performances have been investigated. Pseudo-second-order kinetics described the interfacial reductive adsorption process on Sn/ HAP, characterized by low activation energy (21 kJ mol (1)), when measured in the 278-318 K range. Tests performed in the 2-6 pH interval showed similar efficiency in terms of Cr(VI) removal. Tests performed in the 2-6 pH interval showed similar efficiency in terms of Cr(VI) removal. Conventional procedures of recycling and regeneration resulted ineffective in restoring the pristineperformances of the samples due to surface presence of both Sn(IV) and Cr(III). To overcome these weaknesses, the used samples (Sn + Cr/HAP) were upcycled into catalysts in a circular economy perspective. Used samples were tested as catalysts in gas-phase catalytic processes for air pollution remediation: selective catalytic reduction of NOx (NH3-SCR), NH3 selective catalytic Oxidation (NH3-SCO), and selective catalytic oxidation of methane to CO2. Catalytic tests enlightened the interesting activity of the upcycled Sn + Cr/HAP samples in catalytic oxidation processes, being able to selectively oxidize methane to CO2 at relatively low temperature. (c) 2022 Elsevier Inc. All rights reserved. |
| https://air.unimi.it/bitstream/2434/944148/2/JCIS-22-6058.pdf |
Similar Articles
| ID | Score | Article |
|---|---|---|
17269
|
Kabir, MM; Nahar, N; Akter, MM; Alam, F; Gilroyed, BH; Misu, MM; Didar-ul-Alam, M; Hakim, M; Tijing, L; Shon, HK Agro-waste-based functionalized and economic adsorbents for the effective treatment of toxic contaminants from tannery effluent(2023) | |
| 26456
|
Kaprara, E; Daskalopoulou, E; Simeonidis, K; Mitrakas, M An Integrated Approach for the Recovery of Sn from Used Water Adsorbents(2023)Water, 15, 1 | |
| 12926
|
Wang, J; Yang, QF; Yang, WX; Pei, HN; Zhang, L; Zhang, TS; Hu, N; Suo, YR; Wang, JL Adsorptive catalysis of hierarchical porous heteroatom-doped biomass: from recovered heavy metal to efficient pollutant decontamination(2018)Journal Of Materials Chemistry A, 6.0, 34 | |
| 14343
|
Ghanim, B; Leahy, JJ; O'Dwyer, TF; Kwapinski, W; Pembroke, JT; Murnane, JG Removal of hexavalent chromium (Cr(VI)) from aqueous solution using acid-modified poultry litter-derived hydrochar: adsorption, regeneration and reuse(2022)Journal Of Chemical Technology And Biotechnology, 97, 1 | |
| 25339
|
Peroni, MB; Ocsachoque, MA; Michelena, L; Fernández, MA; Zelaya-Soule, ME; Fermanelli, C; Casella, ML; Saux, C; Jaworski, MA Use of carbon from the agricultural industry for the synthesis of catalysts destined to oxyanions removal from water(2023) | |
| 22259
|
Muedi, KL; Masindi, V; Maree, JP; Brink, HG Rapid Removal of Cr(VI) from Aqueous Solution Using Polycationic/Di-Metallic Adsorbent Synthesized Using Fe3+/Al3+ Recovered from Real Acid Mine Drainage(2022)Minerals, 12.0, 10 | |
| 8387
|
Xu, M; Wu, JS; Wang, JS; Liu, WC; Sun, LM; Zhou, WY; Du, YC; Li, YL; Li, HY Covalent organic framework modified vermiculite for total Cr removal and subsequent recycling for efficient ciprofloxacin and NO photooxidation(2023) | |
| 14904
|
Bo, SF; Luo, JM; An, QD; Zhao, X; Xiao, ZY; Zhai, SR; Li, ZC Circular utilization of Co(II) adsorbed composites for efficient organic pollutants degradation by transforming into Co/N-doped carbonaceous catalyst(2019) |