Department of Bioprocess Engineering and Development of New Paradigm for BIN Fusion Technology, WCU Project, Chonbuk National University, Jeonbuk, South Korea.
Bioresour Technol. 2010 Nov;101(22):8587-92. doi: 10.1016/j.biortech.2010.06.080. Epub 2010 Jul 13.
A new combined way of biosorption and incineration is presented for the recovery of gold from gold-cyanide solutions. Decarboxylated biosorbent (DCB) was prepared by removing interfering carboxyl groups from the surface of inactive Corynebacterium glutamicum. The recovery of gold from the exhausted biosorbents was performed using elution or incineration. The maximum gold(I) uptakes were obtained as 50.19 and 86.16mg/g for the raw biomass and DCB, respectively. The biosorption performance of DCB indicated that interfering carboxyl groups were successfully removed. The recovery efficiency of ionic gold through elution and purity of metallic gold by means of incineration were over 93% and as high as 61.89%, respectively. The result of XPS analysis indicated that the gold(I) was able to be reduced into zero-valent gold during incineration. It was noted that the combined method of biosorption and incineration could be effective for concentration and recovery of gold from the cyanide solutions.
提出了一种从氰化金溶液中回收金的新型生物吸附与焚烧联合方法。通过去除失活谷氨酸棒杆菌表面的干扰羧基基团，制备了脱羧生物吸附剂（DCB）。使用洗脱或焚烧从耗尽的生物吸附剂中回收金。对于原始生物质和 DCB，最大的金（I）吸附量分别为 50.19 和 86.16mg/g。DCB 的生物吸附性能表明，干扰的羧基基团已成功去除。通过洗脱回收离子金的效率和通过焚烧获得的金属金的纯度均超过 93%和 61.89%。XPS 分析结果表明，金（I）在焚烧过程中能够被还原成零价金。值得注意的是，生物吸附与焚烧联合方法可有效用于从氰化物溶液中浓缩和回收金。
