研究论文
林翠英,杨旸,李凌,蒋家兴,赵剑曦.有机膨润土吸附水中苯酚的动力学[J].环境科学学报,2003,23(6):738-741
有机膨润土吸附水中苯酚的动力学
- Kinetics of phenol sorption to organobentonite from water
- 基金项目：福建省高校科技项目(K20022);国家教委留学回国人员科研启动基金资助
- 作者
- 单位
- 林翠英
- 福州大学化学系,福州 350002
- 杨旸
- 福州大学化学系,福州 350002
- 李凌
- 福州大学化学系,福州 350002
- 蒋家兴
- 福州大学化学系,福州 350002
- 赵剑曦
- 福州大学化学系,福州 350002
- 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)对苯酚的吸附动力学行为得到改善.
- Abstract：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 (k1), the amount (Γe) 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.
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