有机膨润土吸附水中苯酚的动力学  

Kinetics of phenol sorption to organobentonite from water

作　　者：林翠英[1] 杨旸[1] 李凌[1] 蒋家兴[1] 赵剑曦[1] 

机构地区：[1]福州大学化学系,福州350002

出　　处：《环境科学学报》2003年第6期738-741,共4页Acta Scientiae Circumstantiae

基　　金：福建省高校科技项目 (K2 0 0 2 2 ) ;国家教委留学回国人员科研启动基金资助

摘　　要：比较两种有机膨润土对水体中苯酚吸附的动力学行为 ,可见双十八烷基二甲基氯化铵改性膨润土 (Bt DHAC)的吸附活化能E较小 ,这使得吸附速率常数k1和平衡吸附量Γe 较大 ,达平衡时间te 较小 ,说明利用Bt DHAC更有利于对水体中苯酚的吸附 .随着温度升高 ,单十八烷基三甲基氯化铵改性膨润土 (Bt SHAC)Kinetics of phenol sorption to organobentonite from water has been studied at pH≈6.5 and at different temperature. The results showed that the energy of activation E of phenol sorption at the organobentonite modified by di-octadecyl dimethylammounium chloride (Bt/DHAC) is smaller than at the that modified by octadecyl trimethylammounium chloride (Bt/SHAC), which leads to larger kinetic rate constant (k_1), the amount (Γ~e) of sorption at equilibrium and smaller the time reaching sorption equilibrium for the former system in comparison with the later. The results indicate Bt/DHAC is much suitable to phenol sorption than Bt/SHAC. With increasing temperature, however, kinetic behavior of phenol sorption at Bt/SHAC is considerably enhanced.

关 键 词：有机膨润土 吸附动力学 苯酚 十八烷基氯化铵 水处理 

分 类 号：X131[环境科学与工程—环境科学]