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[Angew. Chem. Int. Ed.] Environmentally Benign, Rapid and Selective Extraction of Gold from Ores and Waste Electronic Materials
来源:杨鹏博士个人网站 发布日期:2017-06-27
作者:Chunlin Yue, Huaming Sun, Wen-Jing Liu, Binbin Guan, Xudong Deng, Xu Zhang, Peng Yang*
关键字:Gold recovery, Coordination complex, Electronic waste, Non-cyanide gold leaching, Selective extraction
论文来源:期刊
具体来源:Angew. Chem. Int. Ed.
发表时间:2017年

  The extraction of gold from ores and electronic waste is an important topic worldwide, as this precious metal has immense value in a variety of fields. However, serious environmental pollution and high energy consumption due to the use of toxic oxidation reagents and harsh reaction conditions is a well-known problem in the gold industry. Herein, we report a new chemical method based on the combined use of N-bromosuccinimide (NBS) and pyridine (Py), which has a greatly decreased environmental impact and reagent cost, as well as mild reaction requirements. This method can directly leach Au(0) from gold ore and electronic waste to form Au(III) in water. The process is achieved in a yield of approximately 90% at room temperature and a nearly neutral pH. The minimum dose of NBS/Py is as low as 10 mM, which exhibits low toxicity towards mammalian cells and animals as well as aquatic creatures. The high leaching selectivity of Au over other metals during gold leaching is demonstrated, showing that this method has great potential for practical industrial application towards the sustainable refining of gold from ores and electronic waste.

Chunlin Yue, Huaming Sun, Wen-Jing Liu, Binbin Guan, Xudong Deng, Xu Zhang, Peng Yang*. Environmentally Benign, Rapid and Selective Extraction of Gold from Ores and Waste Electronic Materials. Angew. Chem. Int. Ed.  2017, DOI: 10.1002/anie.201703412; Angew. Chem. 2017, DOI: 10.1002/ange.201703412

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