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Six chelating hollow fiber membranes were prepared by radiation-induced grafting of glycidyl methacrylate onto a polyethylene hollow fiber membrane and its subsequent amination. The adsorption characteristics of Pb 2ϩ and Pd 2ϩ for the chelating hollow fiber membranes were presented when the solution of Pb 2ϩ and Pd 2ϩ permeates across the chelating membrane, respectively. The degree of grafting for glycidyl methacrylate increases with increasing monomer concentration, reaction temperature, and preirradiation dose. The adsorption of Pd 2ϩ by chelating hollow fiber membranes modified with five kinds of amines was in the following order: diethylene triamine Ͼ hexamethyl diamine Ͼ ethylene diamine Ͼ dimethyl amine Ͼ trimethyl amine. The chelating hollow fiber membrane modified with iminodiacetic acid adsorbed Pb 2ϩ ions much more than Pd 2ϩ .

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The low-grade pyrolytic oil produced from pyrolysis of municipal plastic waste in a commercial rotary kiln reaction system cannot be an acceptable fuel oil due to its low quality. Thus, the degradation of pyrolytic oil was conducted in a bench scale batch reactor, which was done by two experiment conditions of high heating rate (about 7 o C/min) and low heating rate (1.5-3.6 o C/min) up to 420 o C of reaction temperature. The characteristics of raw pyrolytic oil were examined and also the characteristics of products obtained by different heating rates were compared. Raw pyrolytic oil had higher H/C ratio and higher heating value than commercial oils, and also its peak range in GC analysis showed wide distribution including all the range of gasoline, kerosene and diesel. In the upgrading of pyrolytic oil, cumulative amount profile of product oil, as a function of reaction time, was similar in shape to the degradation temperature profile. All product oils obtained by different degradation temperature had higher H/C ratio and slightly higher heating value than those of raw pyrolytic oil. Also, the characteristics of product oils were influenced by heating rate and reaction temperature.