Assessment of di-(2-ethylhexyl) phthalate (DEHP) in municipal and industrial sludges of Taiwan by supercritical fluid extraction (SFE) and gas chromatography with electron ionization detection

Hsiao Fen Cheng, Mathava Kumar, Jih-Gaw Lin*

*Corresponding author for this work

Research output: Contribution to journalArticle

9 Scopus citations

Abstract

In the present study, DEHP in selected municipal sewage (raw and treated) and industrial sludges of Taiwan was quantified by SFE and GC/EID. As a precursor, the optimal operating parameters of SFE were identified by laboratory experiments using DEHP spiked quartz sand. DEHP extraction efficiency was increased by the addition of modifier i.e. methanol (0.5mL, 7%). DEHP concentration in all sewage sludge (M-1 to M-4) and a textile industry (I-6) samples were above the limit suggested by the European Union (100mg/kg). The results suggest that excess DEHP concentration observed in the sewage sludge needs considerable attention before disposal.

Original languageEnglish
Pages (from-to)132-146
Number of pages15
JournalSeparation Science and Technology
Volume43
Issue number1
DOIs
StatePublished - 1 Jan 2008

Keywords

  • Di-(2-ethylhexyl) phthalate
  • Sewage sludge
  • Soil fertilizer
  • Supercritical fluid extraction

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