2-Steps Preparation Activated Carbon from Solidago Canadensis: Carbonized by Electrial heating and A

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The activated carbon (AC) was prepared from Solidago Canadensis (SC),an alien invasive plant. The plant was firstly carbonized under nitrogen at 400 ℃ for 90 min in an electrical furnace,and then the product was activated with KOH through microwave radiation. Effects of KOH/C ratio,microwave power,microwave radiation time on the adsorption capacities and yield of AC were evaluated. It indicated that the optimum conditions were KOH/C ratio 2 g/g,microwave power 700 W,and microwave radiation time 6 min. The carbonation process of SC was analyzed by thermogravimetry (TG). The pore structural parameters and surface functional groups of the AC were characterized by nitrogen adsorption-desorption and Fourier Transformed Infrared Spectroscopy (FTIR),respectively. The activation yield,the surface area,the average pore size,and the average micropore size of AC prepared from optimum conditions were 53.75%,1 888 m
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