Degradation of cis-Chlordane in Aqueous Isopropanol, Isopropanol and Hexane by UV Radiation Treatment

  • Maria Pythias B. Espino Institute of Chemistry, University of the Philippines Diliman, Quezon City
  • Satoshi Nakai Department of Chemical Engineering, Tokyo University of Agriculture and Technology, Tokyo
  • Masaaki Hosomi Department of Chemical Engineering, Tokyo University of Agriculture and Technology, Tokyo
Keywords: cis-chlordane, UV irradiation, photodegradation products, solid-phase extraction, GC-MS

Abstract

The degradation of cis-chlordane in different solvents by UV irradiation was investigated. The solvent affects the photodegradation of cis-chlordane where the degradation rate increases as solvent polarity increases: hexane (t1/2 = 315 min) < isopropanol (t1/2) = 277 min) < aqueous isopropanol (t1/2 = 25 min). The degradation of cis-chlordane and the formation of a number of photoproducts were monitored and analyzed by GC-MS. Solid-phase extraction with graphitized carbon black was used to extract cis-chlordane and its photoproducts in aqueous isopropanol. cis-Chlordane degrades by dechlorination in hexane while in isopropanol and in aqueous isopropanol, it degrades by dechlorination and oxidation. The chemical structures of the photoproducts were proposed.
Published
2006-11-01
How to Cite
Espino, M. P. B., Nakai, S., & Hosomi, M. (2006). Degradation of cis-Chlordane in Aqueous Isopropanol, Isopropanol and Hexane by UV Radiation Treatment. KIMIKA, 22(2), 65-75. https://doi.org/10.26534/kimika.v22i2.65-75
Section
Research Articles