一种用于从废水中可持续获取金（III）的三嗪膜。
A Triazine Membrane for Sustainable Acquisition of Au(III) from Wastewater.
作者信息
Shang Ge, Dong Haonan, Zhang Yi, Zhang Conghuan, Chen Ting, He Yunhua, He Hongxing, Li Weili, Deng Xiujun, Nie Zhifeng, Zhao Sibiao
机构信息
Yunnan Key Laboratory of Metal-Organic Molecular Materials and Device, School of Chemistry and Chemical Engineering, Kunming University, Kunming 650214, China.
Kunming Institute for Food and Drug Control, Kunming 650034, China.
出版信息
Molecules. 2024 Apr 29;29(9):2051. doi: 10.3390/molecules29092051.
The recovery of Au(III) from solution using adsorbents in the form of granules or powders is challenging due to issues such as instability during the recovery process or mass loss caused by small particle size. This study introduces a PEI-TCT/PVDF composite membrane designed to intercept and capture Au(III) in wastewater. Experimental results demonstrated that the PEI-TCT/PVDF membrane exhibits a broad pH range (1-8) and a high retention efficiency for Au(III) of 97.8%, with a maximum adsorption capacity of 294.5 mg/g. The mechanism of Au(III) adsorption on the PEI-TCT/PVDF membrane was mainly through electrostatic adsorption, which caused AuCl to aggregate on the surface of the membrane and gradually reduced to Au and Au. Furthermore, the membrane can be entirely regenerated within 20 min and maintains its performance in subsequent adsorption cycles. This study highlights the potential of PEI-TCT/PVDF membranes for the recovery of precious Au(III).
使用颗粒或粉末形式的吸附剂从溶液中回收Au(III)具有挑战性，因为存在回收过程中的不稳定性或小粒径导致的质量损失等问题。本研究介绍了一种旨在拦截和捕获废水中Au(III)的PEI-TCT/PVDF复合膜。实验结果表明，PEI-TCT/PVDF膜具有较宽的pH范围（1-8），对Au(III)的保留效率高达97.8%，最大吸附容量为294.5 mg/g。Au(III)在PEI-TCT/PVDF膜上的吸附机制主要是通过静电吸附，这导致AuCl在膜表面聚集并逐渐还原为Au和Au。此外，该膜可在20分钟内完全再生，并在随后的吸附循环中保持其性能。本研究突出了PEI-TCT/PVDF膜在回收珍贵Au(III)方面的潜力。
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