XAS study of the residual copper after desorption from rice husk ash

Pei Chi Chang, Yu Ling Wei, Shuo Hsiu Chang, H. Paul Wang

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

Rice husk ash is a good sorbent to remove copper ions from industrial wastewater. To recover the sorbed copper, two reagents (nitric acid and sodium thiosulfate) were used to desorb copper from the rice husk ash. XAS was used to investigate speciation of the residual copper in the rice husk ash after desorption. XANES simulation indicates that the copper species distributions in all pre-desorbed and post-desorbed solid samples are 40-45% CuSO4 + 41-52% CuO + 7-16% Cu(OH)2. On the other hand, in the liquid phase collected from desorption by Na2S2O3, Cu2O accounts for 48% of the total copper. Formation of Cu2O is attributed to the chemical reduction of Cu(II) with Na2S2O3 that is a reductant.

原文English
頁(從 - 到)224-227
頁數4
期刊Journal of Electron Spectroscopy and Related Phenomena
156-158
DOIs
出版狀態Published - 2007 5月

All Science Journal Classification (ASJC) codes

  • 電子、光磁材料
  • 輻射
  • 原子與分子物理與光學
  • 凝聚態物理學
  • 光譜
  • 物理與理論化學

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