Abstract:Aims to absorption experiment with normal activated carbon modified with acid and base, its purpose is to find out the principles on absorption of naphthalene on the activated carbon in different conditions, such as different amounts of activated carbon, absorption time, pH value, temperature. The results indicate as follows: the absorption quantities of naphthalene on activated carbon increase with the increase of initial concentration of naphthalene; absorption quantities drop with the rise of temperature but not so greatly and also are hardly influenced by pH value; absorption comes to saturation in 30 minutes and reaches about 200 mg/g; the final results of isothermal absorption equation show that absorption is a physical process and the sequence of absorption capacity is arranged as follows: activated carbon modified with acid and base, activated carbon modified with acid, and unmodified activated carbon. In addition, the relationship between desorption of unmodified activated carbon saturated with naphthalene and time is observed by using dehydrated alcohol. After soaked in alcohol for 90 minutes, the desorption rate of naphthalene reaches 98%.