Removal of Pollutants with Activated Carbon Produced from K_2CO_3 Activation of Lignin From Reed Black Liquors

摘要

The activated carbon was prepared from fast precarbonization of reed lignin in the fluidized-bed followed by K_2CO_3 activation.The impregnation ratio was zeta = 1:1 in this research.The effect of activation temperature upon the BET specific surface area and specific pore volume of the carbon was closely investigated.Increasing activation temperature led to an opening and widening of the porous structure below 800 deg C.Above 800 deg C,the excess widening of pore led to the decrease of BET surface area and micropore volume.The BET specific surface area and specific pore volume of the carbon activated at 800 deg C were s = 1217 m~2 g~(-1) and v = 0.65 ml g~(2+),respectively.The potential application of the carbon activated at 800 deg C for removal of pollutants was also investigated.The Langmuir monolayer adsorption capacity q_m of this activated carbon of adsorbing phenol,nitrobenzene,and Cr (VI) can reach 136.2,393.7 and 52.6 mg g~(-1),respectively.The experimental results showed that it had good adsorption capacity.