Extraction of nanosize copper pollutants with an ionic liquid

Hsin Liang Huang, H. Paul Wang, Guor Tzo Wei, I. Wen Sun, Jing Fang Huang, Y. W. Yang

研究成果: Article同行評審

62 引文 斯高帕斯(Scopus)


Speciation and possible reaction paths of nanosize copper pollutants extracted with a RTIL (room-temperature ionic liquid ([C4mim][PF 6], 1-butyl-3-methylimidazolium hexafluorophosphate)) have been studied in the present work. Experimentally, in a very short contact time (2 min), 80-95% of nanosize CuO as well as other forms of copper (such as nanosize Cu, Cu2+, or Cu(II)(ads) (in the channels of MCM-41)) in the samples could be extracted into the RTIL The main copper species extracted in the RTIL as observed by XANES (X-ray absorption near edge structure) were Cu(II). Existence of Cu-N bondings with coordination numbers (CNs) of 3-4 for copper extracted in the RTIL was found by EXAFS (extended X-ray absorption fine structural) spectroscopy. Interestingly, chelation of Cu(II) with 1-methylimidazole (MIm) in the RTIL during extraction was also observed by 1H NMR (nuclear magnetic resonance). At least two possible reaction paths for the rapid extraction of nanosize copper pollutants with the RTIL might occur: (1) an enhanced dissolution of nanosize CuO (to form Cu2+) and (2) formation of [Cu(Mlm)4(H2O)2] 2+ that acted as a carrier of copper into the RTIL matrix.

頁(從 - 到)4761-4764
期刊Environmental Science and Technology
出版狀態Published - 2006 8月 1

All Science Journal Classification (ASJC) codes

  • 一般化學
  • 環境化學


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