A new approach for the recovery of precious metals from solution and from leachates derived from electronic scrap
A new approach for the recovery of precious metals from solution and from leachates derived from electronic scrap
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DOI：
10.1002/bit.21108
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发表时间：
2007-03
影响因子：
3.8
通讯作者：
L. Macaskie;N. J. Creamer;Ashraf M M Essa-Ashraf-M-M-Essa-49309016;N. L. Brown
中科院分区：
文献类型：
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作者：
L. Macaskie;N. J. Creamer;Ashraf M M Essa-Ashraf-M-M-Essa-49309016;N. L. Brown
介绍了一种利用肺炎克雷伯氏菌好氧生长产生的沼气从水溶液中回收贵金属(Pm：Au、Pd和Ag)的新方法，效率为99%。用该方法从电子废料浸出液(∼95%)中回收金，对铜有一定的选择性。能量色散X射线微区分析(EDX)表明，回收的PM固体均含有金属和硫。X-射线粉末衍射仪(X射线衍射仪)显示没有结晶的金属硫化合物，但有结晶的钯胺。银以硫化物(EDX发现)、碳酸盐和氧化物(X射线衍射发现)的形式被回收。金沉淀物的EDX分析主要为金和硫，X射线衍射仪检测到少量的金属金(0)。这种黄金化合物对冲击很敏感；在研磨时，它被引爆，留下了一层黑烟。生物技术。比昂斯。2007年；96：631-639。©2006威利期刊公司。
A new approach is described for the recovery of precious metals (PMs: Au, Pd and Ag) with >99% efficiency from aqueous solution utilising biogas produced during the aerobic growth of Klebsiella pneumoniae. Gold was recovered from electronic scrap leachate (∼95%) by this method, with some selectivity against Cu. The recovered PM solids all contained metal and sulphur as determined by energy dispersive X‐ray microanalysis (EDX). X‐ray powder diffraction analysis (XRD) showed no crystalline metal sulphur compounds but a crystalline palladium amine was recorded. Silver was recovered as a sulphide (found by EDX), carbonate and oxide (found by XRD). EDX analysis of the Au‐precipitate showed mainly gold and sulphur, with some metallic Au(0) detected by XRD. The gold compound was shock‐sensitive; upon grinding it detonated to leave a sooty black deposit. Biotechnol. Bioeng. 2007;96:631–639. © 2006 Wiley Periodicals, Inc.