使用化学改性雪松木材粉末回收钯。
Recovery of palladium using chemically modified cedar wood powder.
作者信息
Parajuli Durga, Hirota Koichi
机构信息
Environment and Industrial Materials Research Division, Japan Atomic Energy Agency, 1233-Watanuki, Takasaki 370-1292, Japan.
出版信息
J Colloid Interface Sci. 2009 Oct 15;338(2):371-5. doi: 10.1016/j.jcis.2009.06.043. Epub 2009 Jun 23.
Japanese cedar wood powder (CWP) was chemically modified to a tertiary-amine-type adsorbent and studied for the selective recovery of Pd(II) from various industrial waters. Batch adsorption tests performed from 0.1 M to 5 M HCl and HNO3 systems reveal stable performance with better results in HNO3 medium. The maximum loading capacity for Pd(II) was studied in HCl as well as in HNO3. A continuous-flow experiment taking a real industrial solution revealed the feasibility of using modified CWP for the selective uptake and preconcentration of traces of palladium contained in acidic effluents. In addition, stable adsorption performance even on long exposure to gamma-irradiation and selective recovery of palladium from simulated high-level liquid waste (HLW) are important outcomes of the study.
日本雪松木材粉末（CWP）被化学改性为叔胺型吸附剂，并用于研究从各种工业用水中选择性回收钯（II）。在0.1 M至5 M的HCl和HNO₃体系中进行的批量吸附试验表明，该吸附剂性能稳定，在HNO₃介质中效果更佳。研究了HCl和HNO₃中钯（II）的最大负载量。采用实际工业溶液进行的连续流实验表明，改性CWP可用于酸性废水中痕量钯的选择性吸收和预富集。此外，该研究的重要成果还包括即使长时间暴露于伽马辐射下仍具有稳定的吸附性能，以及能从模拟高放废液（HLW）中选择性回收钯。
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