花生壳活性炭对水中荧光素钠的吸附及动力学  

Adsorption and dynamics of active peanut shell carbon adsorbing fluorescein sodium

作　　者：龚正君[1] 周文波[1] 陈钰[1] 

机构地区：[1]西南交通大学地球科学与环境工程学院,成都610031

出　　处：《环境工程学报》2013年第1期221-225,共5页Chinese Journal of Environmental Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(SWJTU12-CX020)

摘　　要：H3PO4活化花生壳炭(750℃)为吸附剂,荧光素钠为吸附质。考察了炭化温度、投加量、pH、离子强度、吸附时间以及初始浓度对花生壳活性炭吸附荧光素钠的影响。重点研究了花生壳活性炭对荧光素钠的等温吸附特征,并利用准一级、准二级动力学模型和颗粒内扩散方程对花生壳活性炭吸附荧光素钠的动力学过程进行了分析。结果表明,本实验条件下,Langmuir等温吸附模型能很好地描述花生壳活性炭对荧光素钠的吸附效果,吸附强度因子a为正值,表明吸附过程在本实验条件下可自发进行。通过带入实验数据校对得出准二级动力学方程能更好地描述花生壳活性炭对水中荧光素钠的吸附动力学过程。Active peanut shell carbon （750℃） as adsorbent, fluorescein sodium as adsorbate, the influ- ences of carbonization temperature, dosage, initial pH, ionic strength, adsorption time, and concentration on ad- sorption effect were investigated in the test. Focuses on the isothermal adsorption characteristics of the active pea- nut shell carbon adsorbing fluorescein sodium, the pseudo-first order, pseudo-second order kinetic dynamics models and the particulate interior diffusion equation were used to analyze the dynamic process. The results showed that Langmuir isotherm model can simulate the adsorption effect well, and the adsorption intensity factors （a） were positive, which indicated the spontaneity of adsorption process. By substituting experimental data into dynamic model, the pseudo-second order kinetic dynamic model can better simulate the trend of data.

关 键 词：荧光素钠 花生壳活性炭 等温吸附 动力学 

分 类 号：X703.1[环境科学与工程—环境工程]