Abstract: Mesoporous activated carbon has been prepared with Sargassum fusiforme biochar as raw materials by CO₂ physical activation. The experiments have been designed by response surface central composite method and the influences of activated temperature,activated time,CO₂ flow rate on the adsorption of the prepared activated carbon for methylene blue(MB) and its interaction investigated. The prepared activated carbon is to be characterized by nitrogen adsorption-desorption method. The results show that when activated temperature is 900℃,activated time 30 min, and CO₂ flow rate 1.8 L/min,the BET specific surface area of the prepared activated carbon,adsorption value for methylene blue,total pore volume,and mesopore rate are 1 329 m²/g,235 mg/g,1.176 9 mL/g,and 65%,respectively.

Key words: Sargassum fusiforme biochar, mesoporous activated carbon, response surface methodology, CO₂ physical activation, methylene blue

摘要： 以羊栖菜生物炭为原料，采用CO₂物理活化法制备中孔活性炭。应用响应曲面中心组合法设计实验，考察了活化温度、活化时间及CO₂流量对制备的活性炭吸附亚甲基蓝的影响及其交互作用，并采用N₂吸附脱附对所制备的活性炭进行表征。结果表明，当活化温度为900℃，活化时间为30 min，CO₂流量为1.8 L/min时，制备的活性炭的比表面积为1 329 m²/g，其对亚甲基蓝的吸附值高达235 mg/g，总孔体积为1.176 9 mL/g，中孔率为65%。

关键词: 羊栖菜生物炭, 中孔活性炭, 响应曲面法, CO₂物理活化法, 亚甲基蓝

CLC Number: 

• TQ424.1