在非水溶剂乙酸酐中快速、选择性地从废弃随机存取存储器中回收金

IF 10.9 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling Pub Date : 2025-10-10 DOI:10.1016/j.resconrec.2025.108619

Duy Tho Tran , Ngoc Tu Trinh Tran , Greeshma James , Xiaoyu Lin , Myung-Hee Song , Yeoung-Sang Yun

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引用次数: 0

摘要

在这项研究中，我们成功地展示了一种快速、选择性地从废弃随机存取存储器（WRAM）中浸出金的系统，该系统使用醋酸酐作为非水溶剂，与HCl、H2O2和CaCl2结合使用。在最佳条件下，金的选择性浸出时间为5 min，料液比较高。优化结果还表明，HCl是影响最大的因素。进一步的实验表明，氯离子在乙酸酐溶剂中更自由地移动，促进了金的溶解。此外，浸出被证明是可重复的，并保持高效率长达7个循环，总效率为93.8±1.1%。随后，使用Na2S2O5回收Au的效率为99.8%。建议的回收金方法的可行性显示，每吨回收的WRAM可赚取25,000元的利润。因此，本研究为电子垃圾回收中快速选择性浸出金提供了一种新颖有效的方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Rapid and selective gold recovery from waste random access memory in a non-aqueous solvent acetic anhydride

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Rapid and selective gold recovery from waste random access memory in a non-aqueous solvent acetic anhydride

In this study, we have successfully demonstrated a rapid and selective leaching system for Au from waste random access memory (WRAM) using acetic anhydride as a non-aqueous solvent with the combination of HCl, H₂O₂, and CaCl_2. Under optimal condition, Au was selective leached out under 5 min with a high solid/liquid ratio. The optimization results also highlighted that HCl was the most influential factor. Further experiments revealed that Cl^- ions move more freely in the acetic anhydride solvent, facilitating Au dissolution. Furthermore, the leaching proved repeatable and retained high efficiency for up to 7 cycles with an overall efficiency of 93.8 ± 1.1 %. Subsequently, Au was recovered with a 99.8 % efficiency using Na₂S₂O₅. The feasibility of the proposed Au recovery process revealed a profit margin of $25,000/ton of recycled WRAM. Hence, this study presents a novel and efficient approach for the rapid and selective leaching of Au in e-waste recycling.

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.