摘要
探讨了γ-Al2O3超细粉末吸附人工配制的废水中三氯乙烯(TCE)的吸附等温线、吸附动力学及热力学。结果表明:Al2O3对TCE的吸附能力随温度的升高而显著增强;TCE在Al2O3表面的吸附层数为0.68层;Langmuir、Freundlich和deBoer-Zwikker公式都可以用来描述Al2O3吸附TCE的吸附等温线;Al2O3对TCE的吸附符合拟二级动力学方程,吸附反应的活化能为14.75 kJ.mol-1,吸附焓为8.87 kJ.mol-1,属于自发的吸热反应。
Discussed in this paper were the adsorption isotherm, adsorption kinetics and adsorption thermodynamics of triehloroethylone （TCE） adsorption by ultrafineγ-Al2O3 powder using manual simulation TCE wastewater. Experimental results indicated that the removal efficiency of TCE increases rapidly with increasing temperature of the solution. The layer number of TCE molecules adsorbed on the Al2O3 molecular surface is 0.68. The adsorption data fit well to the Langmuir, Freundlich and de Boer- Zwikker equations. The TCE adsorption on Al2O3 powder follows the pseudo second-order equation and activation energy（Ea） and the adsorption enthalpy of the adsorption reaction is 14.75 kJ · mol^-1 , 8.87 kJ · mo1^-1 , respectively. The adsorption of TCE is a spontaneous and decalescence adsorption process.
出处
《地球与环境》
CAS
CSCD
北大核心
2008年第3期270-275,共6页
Earth and Environment
基金
国家自然科学基金项目(40102027
50578151)
北京市自然科学基金项目(8052017)
