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Environmental Earth Sciences

, Volume 61, Issue 5, pp 939–945 | Cite as

Study on the purification property of pyrite and its spectra on the processing of metal-bearing wastewater

  • Chun-lin Wang
  • Ping Zhang
  • Yong-heng ChenEmail author
  • Jian-yang Pan
  • Jin Wang
  • Jian-ying Qi
  • Xiang-ping Li
  • Juan Liu
Original Article

Abstract

The purification property of pyrite was discussed by using in situ attenuated total reflection-Fourier transform infrared spectroscopy. Results showed that there might be dissolution–adsorption precipitation equilibrium of heavy metals on the surface of pyrite, which is dependent on the surface oxidation of pyrite and the neutralization reaction of carbonate within pyrite. If there was excessive carbonate within pyrite, the “dissolution” of metals would be less than that of the “adsorption precipitation,” making pyrite exhibit its purification property. Based on this property, pyrite was used to process simulated wastewater containing Pb2+, Hg2+, Cd2+, Cr(VI) and Cu2+. Results showed that the efficiencies of metal removal exceeded 96%. In addition, reflectance spectroscopy and absorption spectroscopy were also utilized to investigate the simulated metal-bearing wastewater treatment process. Analysis by diffused reflectance infrared Fourier transform spectroscopy confirmed that the superficial hydroxyl groups in pyrite reacted with metal ions during the wastewater treatment process. Reflectance spectroscopy in the visible region was used to characterize the variation in particle size and specific surface area of pyrite during the wastewater treatment process, which explained its increasing activity when reutilized. Further, analysis by absorption spectroscopy and X-ray photoelectron spectroscopy indicated that the process involved when using pyrite for the treatment of Cr(VI)-containing wastewater was an adsorption–precipitation process.

Keywords

Pyrite Purification property Heavy metal ATR-FTIR DRIFTS Wastewater treatment 

Notes

Acknowledgments

This work was supported by the Union Foundation of Guangdong Provincial Government and National Nature and Science Foundation Committee of P R of China (No. U0633001), and it is also contribution No. IS-1142 from GIGCAS.

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Copyright information

© Springer-Verlag 2010

Authors and Affiliations

  • Chun-lin Wang
    • 1
    • 2
    • 3
  • Ping Zhang
    • 1
    • 2
  • Yong-heng Chen
    • 2
    Email author
  • Jian-yang Pan
    • 4
  • Jin Wang
    • 1
  • Jian-ying Qi
    • 1
  • Xiang-ping Li
    • 1
  • Juan Liu
    • 1
  1. 1.State Key Laboratory of Organic Geochemistry, Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhouChina
  2. 2.School of Environmental Science and EngineeringGuangzhou UniversityGuangzhouChina
  3. 3.Graduate University of Chinese Academy of SciencesBeijingChina
  4. 4.Hangzhou Environmental Monitoring Center StationHangzhouChina

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