Palladium and gold removal and recovery from precious metal solutions and electronic scrap leachates by Desulfovibrio desulfuricans
Palladium and gold removal and recovery from precious metal solutions and electronic scrap leachates by Desulfovibrio desulfuricans
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DOI：
10.1007/s10529-006-9120-9
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发表时间：
2006-09-01
影响因子：
2.7
通讯作者：
Macaskie, Lynne E.
中科院分区：
文献类型：
--
作者：
Creamer, Neil J.;Baxter-Plant, Victoria S.;Macaskie, Lynne E.
利用脱硫弧菌的生物量从试验溶液和废旧电子垃圾浸出液中回收Au(III)作为Au(0)。Au(0)的胞外沉淀机制与Pd(0)的生物沉积机制不同。渗滤液中Cu2+的存在(类似于2000 mg/L)抑制了氢酶对Pd(II)的去除，但在没有添加Cu2+的情况下预灰化促进了从渗滤液中去除Pd(II)，并且超过95%的Pd(II)从添加了Cu(II)和Pd(II)的试验溶液中被自动催化去除。在气升式电生物反应器中，用电化学产生的氢气回收金属，然后在重力下沉淀回收的金属。提出了一种回收Au(III)、Pd(II)和Cu(II)的三段生物分离工艺。
Biomass of Desulfovibrio desulfuricans was used to recover Au(III) as Au(0) from test solutions and from waste electronic scrap leachate. Au(0) was precipitated extracellularly by a different mechanism from the biodeposition of Pd(0). The presence of Cu2+ (similar to 2000 mg/l) in the leachate inhibited the hydrogenase-mediated removal of Pd(II) but pre-palladisation of the cells in the absence of added Cu2+ facilitated removal of Pd(II) from the leachate and more than 95% of the Pd(II) was removed autocatalytically from a test solution supplemented with Cu(II) and Pd(II). Metal recovery was demonstrated in a gas-lift electrobioreactor with electrochemically generated hydrogen, followed by precipitation of recovered metal under gravity. A 3-stage bioseparation process for the recovery of Au(III), Pd(II) and Cu(II) is proposed.