Enzymatic Degradation of Polystyrene by Hydroquinone Peroxidase of Azotobacter beijerinckii HM121

概要

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The hydroquinone peroxidase of a lignin decolorizing bacterium, Azotobacter beijerinckii HM121 degraded a waster-insoluble synthetic polymer, polystyrene, in a two-phase system (dichloromethane-water), in which it was degraded in dichloromethane to small water-soluble molecules in a short time in the presence of hydrogen peroxide and tetramethylhydroquinone. Two grams per liter of polystyrene (M_r 935,000) in the dichloromethane phase was completely transferred to the water phase in 5 min by the enzymatic reaction. The degradation products in the water phase were initially detected at R_f 0.6 (M_r 1,000) in thin layer chromatography after reacting for 5 min, and then at R_f 0 (M_r 350) after reacting for 10 min. Another polystyrene (M_r 114,200) was degraded in a similar manner but low molecular weight polystyrene (M_r 760) was degraded and detected at R_f 0 without producing intermediate products at R_f 0.6 after 1-min reaction.
社団法人日本生物工学会の論文
1997-11-25