Subcritical water extraction for the remediation of phthalate ester-contaminated soil

Matt S. Chang, Jermiah Y. Shen, Sheng Hsiung Yang, Gaston J. C. Wu

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Subcritical water has been used as an environment-friendly extraction fluid for many classes of organic compounds. It was used for the removal of phthalate esters (PEs), such as di-methyl phthalate, DMP; di-ethyl phthalate, DEP; di-iso-propyl phthalate, DIPP; di-n-butyl phthalate, DBP; benzyl butyl phthalate, BBP; di-n-pentyl phthalate, DpentP; di-n-hexyl phthalate, DHXP; di-heptyl phthalate, DheptP; di-2-ethylhexyl phthalate, DEHP; di-n-nonyl phthalate, DNP; di-n-octyl phthalate, DOP; di-n-decyl phthalate, DDP, in soil samples under the optimum condition of 250°C and 10. MPa in our study. The soil samples cleaned with subcritical water were extracted by homemade accelerated solvent extraction system (ASE) and analyzed by HPLC-UV to check for soil remediation efficiency. Three types of soil collected at different sites in Taiwan have been tested. Although at higher PEs concentration levels, the modification of treatments may be necessary for satisfactory removal of the contaminants, soil samples of different PEs levels treated with subcritical water extraction (SCWE) were analyzed and the results indicated removal efficiency ranges of 80-90% for PEs spiked in soil samples. Soil samples contaminated with native DEHP were treated and gave comparable recovery efficiencies. Our results indicate that the applications of subcritical water as soil remediation for removal of PEs contaminant are feasible.

Original languageEnglish
Pages (from-to)1203-1209
Number of pages7
JournalJournal of Hazardous Materials
Volume192
Issue number3
DOIs
Publication statusPublished - 2011 Sep 15

Fingerprint

phthalate
Remediation
ester
Esters
remediation
Soil
Soils
Water
Diethylhexyl Phthalate
Impurities
soil remediation
phthalic acid
water extraction
contaminated soil
soil
Solvent extraction
Dibutyl Phthalate
Organic compounds
Taiwan
Recovery

Keywords

  • Accelerated solvent extraction
  • HPLC-UV
  • Phthalate ester
  • Soil remediation
  • Subcritical water

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

Cite this

Subcritical water extraction for the remediation of phthalate ester-contaminated soil. / Chang, Matt S.; Shen, Jermiah Y.; Yang, Sheng Hsiung; Wu, Gaston J. C.

In: Journal of Hazardous Materials, Vol. 192, No. 3, 15.09.2011, p. 1203-1209.

Research output: Contribution to journalArticle

Chang, Matt S. ; Shen, Jermiah Y. ; Yang, Sheng Hsiung ; Wu, Gaston J. C. / Subcritical water extraction for the remediation of phthalate ester-contaminated soil. In: Journal of Hazardous Materials. 2011 ; Vol. 192, No. 3. pp. 1203-1209.
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