| Autor: |
Zeng, Yongmao, Chen, Shuliang, Li, Xinrong, Lin, Yue, Zhao, Li, Yang, Rencong, Li, Wanting, Hu, Xianzhi, Zi, Futing |
| Předmět: |
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| Zdroj: |
New Journal of Chemistry; 4/7/2024, Vol. 48 Issue 13, p5877-5887, 11p |
| Abstrakt: |
In this study, a novel covalent triazine framework (CTF), CTF-MG, was synthesized using a one-step method and used as an adsorbent to recover gold(I) from a thiosulfate solution. CTF-MG exhibited rapid adsorption kinetics for gold, with an equilibrium gold loading capacity of 10.9 mg g−1. The adsorption of gold was observed to be an exothermic process, and the Freundlich isotherm and pseudo-second-order kinetic models were used to describe the adsorption process. NaCl could effectively elute gold from the gold-loaded CTF-MG at a desorption rate of 90%. Even after five adsorption–desorption cycles, the gold recovery rate still remained above 80%. Moreover, 94.18% of gold in a copper–ethylenediamine–thiosulfate actual gold leaching solution was efficiently recovered using CTF-MG within 4 h. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy characterization results revealed that anion exchange interaction is the mechanism of adsorption of gold by CTF-MG. The development of this work provides a reference for new methods to recover gold(I) in a thiosulfate solution. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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