摘要
研究了KH-560交联壳聚糖固载β-环糊精薄膜对4-硝基苯酚、2,4-二硝基苯酚和2,4,6-三硝基苯酚的吸附行为,测定了吸附质浓度、pH、温度和吸附时间对其吸附性能的影响,并进行了热力学拟合。研究结果表明,在中性条件下,298K下吸附4-硝基苯酚在40min时可以达到平衡;随着硝基数目的增加,吸附量增大;随着温度的升高,吸附量减小;吸附过程用Langmuir模型描述更合适。
The adsorption behavior of 4-nitrophenol,2,4-binitrophenol and 2,4,6-trinitrphenol on the film of KH-560 modified chitosan supported β-cyclodextrin was studied.The effects of concentration of nitrophenolic compounds,pH,temperature and adsorption time on the adsorption were examined.The adsorption data were fitted by the thermodynamic models.Results showed that the adsorption process of 4-nitrophenol reached equilibrium in 40 min at 298 K and neutrally condition;the adsorption capacity was increased with the increasing of nitro-group.Thermodynamic study showed the adsorption capacity of the adsorbent decreased with increasing the temperature.The adsorption process can be simulated by the Langmuir isothermal equation well.
出处
《环境污染与防治》
CAS
CSCD
北大核心
2012年第5期24-27,共4页
Environmental Pollution & Control
基金
国家自然科学基金资助项目(No.21161017)
