Integrated hybrid treatment for the remediation of 2,3,7,8-tetrachlorodibenzo-p-dioxin.
The dioxin isomer 2,3,7,8-tetrachlorodibenzo-p-dioxin (2,3,7,8-TeCDD) has been reported as the deadliest compound known to science. Due to its highly recalcitrant nature and low bioavailability, it is stubborn toward bioremediation and chemical treatment. Efforts to degrade it using one single technique have not accomplished the desired results. In this study, we have tried to develop an integrated 2,3,7,8-TeCDD removal process using palladized iron nanoparticles (Pd/nFe) for initial reductive dechlorination under anoxic conditions and subsequent oxidative biomineralization. Using laboratory synthesized Pd/nFe, 2,3,7,8-TeCDD was completely dechlorinated to form the end product dibenzo-p-dioxin (DD). Oxidative degradation of DD was successfully achieved by growing active cells of a dioxin-degrading microorganism Sphingomonas wittichii RW1 (DSM 6014) under aerobic culture conditions. Metabolite identification was done by high performance liquid chromatography (HPLC) and whole cell protein was measured as the indicator for cell growth. To the best of our knowledge, this is the first report on integrated hybrid degradation method for 2,3,7,8-TeCDD.
School of Environmental Science and Engineering, Pohang University of Science and Technology (POSTECH), Pohang 790‐784, South Korea.
Varima
V
Bokare
Kumarasamy
K
Murugesan
Jae-Hwan
JH
Kim
Eun-Ju
EJ
Kim
Yoon-Seok
YS
Chang
D001682:Biological Availability; D002851:Chromatography, High Pressure Liquid; D004147:Dioxins / Q000378:metabolism; D052918:Environmental Restoration and Remediation / Q000379:methods*; D007501:Iron / Q000737:chemistry; D053768:Metal Nanoparticles / Q000737:chemistry; D010084:Oxidation-Reduction; D010165:Palladium / Q000737:chemistry; D000072317:Polychlorinated Dibenzodioxins / Q000032:analysis / Q000737:chemistry / Q000378:metabolism*; D020578:Sphingomonas / Q000378:metabolism
D004147:Dioxins; D000072317:Polychlorinated Dibenzodioxins; D010165:Palladium; D007501:Iron; C020887:dibenzo(1,4)dioxin