中文摘要：

以CO2为活化气体,在高温条件下对国产椰壳活性炭进行活化。研究了活化前后的活性炭在不同温度和pH等条件下对水溶液中苯酚的吸附行为。结果表明,活性炭经活化后,微孔体积和中孔体积增加,吸附容量明显提高;苯酚在活性炭上的吸附符合Freundlich吸附等温方程和准二级反应动力学方程;在一定范围内降低温度有利于吸附的进行;在pH为2～8时,吸附效果较好;在pH〉9时,吸附效率明显降低。

英文摘要：

CO2-treated activated carbon from domestic coconut was prepared by calcination in high temperature at CO2 atmosphere,the adsorption capacity of raw activated carbon and CO2-treated activated carbon for phenol was investigated and compared.The results showed that the surface characteristics of activated carbon were significantly improved after CO2 activation,with the BET surface area increased from 627.22 m2/g to 822.71 m2/g,micropore volume and mesopore volume increased by 28.6% and 38.9% respectively.The Freundlich model can be used to describe the process of phenol adsorption on activated carbon and the adsorption data were well fitted by pseudo second order equation.The adsorption capacities,which increased with decreasing temperature,were perfect when the solution pH was 2-8,when pH〉9 the adsorption efficiency decreased gradually for the dissociated phenol was not conductive to adsorption process.