Degradation of 2,7-dichlorodibenzo-p-dioxin by Fe(3+)-H(2)O(2) mixed reagent.
Fe(3+)-H(2)O(2) mixed reagent, but not Fe(2+)-H(2)O(2), was found to be capable of degrading 2,7-dichlorodibenzo-p-dioxin (DCDD). A reaction mixture of FeCl(3) (8 mM) and H(2)O(2) (1%) caused approximately 50% degradation within 6 h and >90% degradation within 24 h at 27 degrees C. Increasing the temperature remarkably stimulated degradation: at 70 degrees C, approximately 100% degradation was achieved within 15 min. When DCDD-treated model soil (5 micrograms/g) was conducted, approximately 100% of the DCDD was degraded within 30 min at 70 degrees C (both reagents were added every 10 min). These results suggest that Fe(3+)-H(2)O(2) mixed reagent may be a new tool for combating persistent environmental pollutants such as dioxins and polychlorinated biphenyls.
Department of Environmental Analysis, Osaka University of Pharmaceutical Sciences, 4-20-1 Nasahara, Takatsuki, Osaka 569-1094, Japan. mino@gly.oups.ac.jp
Yoshiki
Y
Mino
Yoko
Y
Moriyama
Yuko
Y
Nakatake
D002712:Chlorides / Q000032:analysis; D002849:Chromatography, Gas; D004147:Dioxins / Q000737:chemistry*; D005290:Ferric Compounds / Q000737:chemistry*; D008401:Gas Chromatography-Mass Spectrometry; D006861:Hydrogen Peroxide / Q000737:chemistry*; D013696:Temperature; D013997:Time Factors
D002712:Chlorides; D004147:Dioxins; D005290:Ferric Compounds; C000925:2,7-dichlorodibenzo-4-dioxin; D006861:Hydrogen Peroxide