Journal of Industrial and Engineering Chemistry

  • Volume 51
  • /
  • Pages.64-70
  • /
  • 2017
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  • 1226-086X(pISSN)
  • /
  • 1876-794X(eISSN)
The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Identification of phosphorus forms in sewage sludge ash during acid pre-treatment for phosphorus recovery by chemical fractionation and spectroscopy

  • Lee, Minsu (Department of Environmental Sciences & Biotechnology and Institute of Energy & Environment, Hallym University) ;
  • Kim, Dong-Jin (Department of Environmental Sciences & Biotechnology and Institute of Energy & Environment, Hallym University)
  • Received : 2016.12.30
  • Accepted : 2017.02.15
  • Published : 2017.07.25
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Abstract

Identification of phosphorus (P) forms is critical for the recovery of P from sewage sludge ash (SSA). During the HCl treatment of SSA Ca was selectively eluted while P mostly remained in the SSA. Chemical P fractionation of the SSA before and after HCl treatment showed that Al-P increased from 46.6% to 79.2% of total P while Ca-P decreased from 28.9% to 4.4% at pH 2.5. HCl treatment also changed chemical structure of Al-P since no crystalline Al-P was found in the SSA after the treatment, only amorphous Al-P was found from the analyses of XRD and ATR-FTIR.

Keywords

Acknowledgement

Supported by : National Research Foundation of Korea (NRF), Hallym University

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