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Journal of Thermal Analysis and Calorimetry

, Volume 90, Issue 3, pp 823–826 | Cite as

Non-isothermal kinetic for lyophilized leachate from sanitary landfill and composting usine

  • Evaneide Nascimento Lima
  • Marisa Spirandeli Crespi
  • C. A. Ribeiro
  • Sonia de Almeida
Article

Abstract

Leachate samples from a sanitary landfill of Araraquara city and composting usine of Vila Leopoldina, São Paulo, Brazil were lyophilized to remove the water content. TG/DTG curves at different heating rates were recorded. The second step of the thermal decomposition of leachate from the Araraquara landfill (CB1), from the composting usine from Vila Leopoldina (CB2) from the organic phase extracted (FO) and aqueous phase (FA) were all kinetically evaluated using the non-isothermal method.

By Flynn-Wall isoconversional method the following values were obtained: E=234±3.65 kJ mol−1 and logA=29.7±0.58 min−1 for CB1; E=129±1.66 kJ mol−1 and logA=11.8±0.10 min−1 for CB2; E=51.6±1.35 kJ mol−1 and logA=6.09±0.09 min−1 for FO and E=76.91±6.33 kJ mol−1 and logA=8.88±0.7 min−1 for FA with 95% confidence level. Applying the procedures of Málek and Koga, SB kinetic model (Šesták-Berggren) is the most appropriate to describe the decomposition of CB1, CB2, FO and FA.

Keywords

kinetic parameters leachate non-isothermal kinetic 

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Copyright information

© Springer Science+Business Media, LLC. 2007

Authors and Affiliations

  • Evaneide Nascimento Lima
    • 1
  • Marisa Spirandeli Crespi
    • 1
  • C. A. Ribeiro
    • 1
  • Sonia de Almeida
    • 1
  1. 1.Instituto de Química, Departamento de Química AnalíticaUniversidade Estadual PaulistaAraraquaraBrazil

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