活性炭对萘吸附的研究

通过对普通煤质活性炭进行酸碱改性处理，研究了不同活性炭加入量、吸附时间、溶液pH值、温度等条件下，对萘溶液的吸附规律。结果表明：活性炭对萘的吸附量随着萘初始浓度的增大而增大；随温度升高，吸附量呈略下降趋势，且温度对吸附影响并不大；溶液pH值对活性炭的吸附量影响也不明显；对萘吸附在30min内达到饱和，饱和吸附量较大，约为200mg／g；由吸附等温公式拟合结果显示为物理吸附，吸附能力顺序为：酸碱改性活性炭〉酸改性活性炭〉未改性活性炭。此外，还考察了用无水乙醇对吸附萘达饱和的未改性活性炭洗脱效率与时间的关系，浸泡90min，洗脱率达98％。

Absorption of Naphthalene on Modified Activeted Carbon

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%.