从废物到珍品:在聚间苯二胺膜上回收和锚定电子废水中的金,用于催化硝基苯酚转化

IF 3.5 Q3 ENGINEERING, ENVIRONMENTAL
Youmei Xu, Yuchao Chen, Mengxia Wang, Yufei Shu, Siyu Cao and Zhongying Wang
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引用次数: 0

摘要

近来,硝基苯酚废水处理以及从电子废水中提取和再利用贵金属受到了广泛关注。在这项研究中,聚苯胺基膜展示了从电子废水中回收金的显著能力,即使在存在竞争性金属阳离子的情况下,也能有效回收膜表面 100% 的金。制备的 Au@PmPD 膜具有高比表面积和丰富的金纳米颗粒 (NPs),表现出卓越的催化活性和稳定性,在 NaBH4 存在下,能在较长时间内保持接近 100% 的转化效率,将 4-NP 还原成 4-AP。与传统的物理混合方法相比,我们在原位形成的 Au@PmPD 膜突出了 Au NPs 和活性位点的良好分布,从而提高了催化效率。它省去了将金氧化物装载到膜上的额外步骤,从而实现了更直接、更高效的工艺。总之,这项研究提供了一种可持续的方法,将废物重新利用为宝贵的资源,并为高效处理废水中的持久性有机污染物提供了一种前景广阔的解决方案,符合循环经济的原则。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

From waste to precious: recovering and anchoring Au from electronic wastewater onto poly(m-phenylenediamine) membranes for catalytic nitrophenol conversion†

From waste to precious: recovering and anchoring Au from electronic wastewater onto poly(m-phenylenediamine) membranes for catalytic nitrophenol conversion†

Nitrophenol wastewater treatment and extracting and reusing precious metals from electronic wastewater have recently gained considerable attention. In this study, polyaniline-based membranes showcased remarkable gold recovery capability from electronic wastewater, effectively reclaiming 100% of gold on the membrane surface even in the presence of competing metal cations. The prepared Au@PmPD membrane, characterized by its high specific surface area and abundant Au nanoparticles (NPs), demonstrated excellent catalytic activity and stability, maintaining near 100% conversion efficiency in reducing 4-NP to 4-AP in the presence of NaBH4 over extended durations. Compared with the conventional physical mixing method, our in situ formation of the Au@PmPD membrane highlights the superior distribution of Au NPs and active sites for enhanced catalytic efficiency. It eliminates the need for additional steps to load Au NPs onto the membrane, resulting in a more straightforward and efficient process. Overall, this research provides a sustainable approach to repurposing waste into precious resources and offers a promising solution for the efficient treatment of persistent organic pollutants in wastewater, aligning with the principles of a circular economy.

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