Creamer Neil J, Baxter-Plant Victoria S, Henderson John, Potter M, Macaskie Lynne E
School of Biosciences, The University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
Biotechnol Lett. 2006 Sep;28(18):1475-84. doi: 10.1007/s10529-006-9120-9. Epub 2006 Aug 15.
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 Cu(2+) ( approximately 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 Cu(2+) 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.
脱硫脱硫弧菌的生物质被用于从测试溶液和废弃电子废料浸出液中以Au(0)的形式回收Au(III)。Au(0)通过与Pd(0)生物沉积不同的机制在细胞外沉淀。浸出液中Cu(2+)（约2000 mg/l）的存在抑制了氢化酶介导的Pd(II)去除，但在不添加Cu(2+)的情况下对细胞进行预钯化有助于从浸出液中去除Pd(II)，并且超过95%的Pd(II)从添加了Cu(II)和Pd(II)的测试溶液中被自催化去除。在具有电化学产生氢气的气升式电生物反应器中证明了金属回收，随后在重力作用下沉淀回收的金属。提出了一种用于回收Au(III)、Pd(II)和Cu(II)的三级生物分离工艺。
