Division of Chemical Engineering and Research Institute of Industrial Technology, Chonbuk National University, Jeonbuk 561-756, Republic of Korea.
Bioresour Technol. 2011 Feb;102(4):3888-93. doi: 10.1016/j.biortech.2010.11.106. Epub 2010 Nov 30.
A new type of biosorbent was developed for binding anionic precious metals through cross-linking waste biomass Corynebacterium glutamicum with polyethylenimine (PEI). This biomass was evaluated for the removal and recovery of palladium and compared to commercial adsorbents, such as Amberjet 4200 Cl, Lewatit Monoplus TP 214, SPC-100, and SPS-200. The kinetic experiments revealed that the sorption equilibrium was reached with 30 min for the PEI-modified biomass. The maximum uptake of the biosorbent was 176.8 mg/g, which was calculated using the Langmuir model. The Pd(II) maximum uptake exhibited the following order: Amberjet 4200 Cl>Lewatit Monoplus TP 214>PEI-modified biomass>SPC-100>SPS-200. Acidified thiourea in 1.0M HCl was used to desorb Pd(II) from all of the sorbents examined.
开发了一种新型生物吸附剂，通过交联废生物质谷氨酸棒杆菌与聚乙烯亚胺（PEI）来结合阴离子贵金属。评估了这种生物质对钯的去除和回收，并与商业吸附剂（如 Amberjet 4200 Cl、Lewatit Monoplus TP 214、SPC-100 和 SPS-200）进行了比较。动力学实验表明，PEI 修饰的生物质在 30 分钟内达到吸附平衡。用 Langmuir 模型计算，生物吸附剂的最大吸附量为 176.8mg/g。Pd(II)的最大吸附量顺序为：Amberjet 4200 Cl>Lewatit Monoplus TP 214>PEI 修饰的生物质>SPC-100>SPS-200。所有被考察的吸附剂都用 1.0M HCl 酸化硫脲进行 Pd(II)的解吸。
