Department of BIN Fusion Technology, Chonbuk National University, Jeonju, Jeonbuk 561-756, Republic of Korea.
Bioresour Technol. 2013 Jun;137:400-3. doi: 10.1016/j.biortech.2013.03.143. Epub 2013 Mar 27.
This work reports a direct way to recover metallic palladium with high purity from Pd(II)-sorbed polyethylenimine-modified Corynebacterium glutamicum biosorbent using a combined method of biosorption and incineration. This study is focused on the incineration part which affects the purity of recovered Pd. The incineration temperature and the amount of Pd loaded on the biosorbent were considered as major factors in the incineration process, and their effects were examined. The results showed that both factors significantly affected the enhancement of the recovery efficiency and purity of the recovered Pd. SEM-EDX and XRD analyses were used to confirm that Pd phase existed in the ash. As a result, the recovered Pd was changed from PdO to zero-valent Pd as the incineration temperature was increased from 600 to 900°C. Almost 100% pure metallic Pd was recovered with recovery efficiency above 99.0% under the conditions of 900°C and 136.9 mg/g.
这项工作报道了一种直接从吸附了钯（II）的聚乙二胺修饰的谷氨酸棒杆菌生物吸附剂中回收高纯度金属钯的方法，该方法结合了生物吸附和焚烧两种方法。本研究集中在焚烧部分，它会影响回收钯的纯度。焚烧温度和生物吸附剂上负载的钯量被认为是焚烧过程中的主要因素，并对它们的影响进行了考察。结果表明，这两个因素都显著影响了回收效率和回收钯纯度的提高。SEM-EDX 和 XRD 分析证实，钯相存在于灰分中。结果表明，随着焚烧温度从 600°C 升高到 900°C，回收的钯从 PdO 转变为零价钯。在 900°C 和 136.9mg/g 的条件下，可回收几乎 100%纯度的金属钯，回收率高于 99.0%。
