环境工程学报2011，Vol.5Issue(7)：1633-1636,4.
改性焦粉对氟离子吸附热力学及机理
Mechanism and thermodynamics of fluor hydronium adsorption on modified coke powder
摘要
Abstract
The structure of waste coke powders modified by 50% HNO3 was characterized by scanning electron microscope (SEM) , X-ray diffraction (XRD) , X-ray photoelectron spectroscopy (XPS) , etc. Adsorption model, the thermodynamics parameters, sticking probability and activation energy of fluor hydronium on modified coke powders were investigated. The adsorption mechanism was also primarily discussed. The result showed that the modified coke powders' pore structure was enlarged, surface area increased and abundant oxygenous function groups grew on the surface. In addition, the adsorption equation was consistent with the Langmuir and Langmuir absorption model. The enthalpy change was 3.6596 Kj/mol, the free energy changed from - 1.5004 to - 2. 0107 kj/mol, the entropy change was 0. 0173 Kj/( mol · K) , sticking probability was 1. 78 X 10 ~ and the activation energy was 21. 35 kj/mol. These results proved that this adsorption was a spontaneous and endother-mic process accompanied with the interface chaos increasing. And the adsorption process to fluor hydronium was interacted by internal diffusion of particles, the formation of coordination complex between surface impurity and fluor hydronium, the formation of hydrogen bond among fluridizer of calcium colloid, oxygenous function groups and fluor hydronium, but internal diffusion of particles was the dominant process.关键词
改性焦粉/氟离子/热力学参数/粘附几率/活化能/吸附机理Key words
modified coke powder/ fluor hydronium/ thermodynamics parameter/ sticking probability/ activation energy/ adsorption mechanism分类
资源环境引用本文复制引用
雒和明,杨鹏,冯辉霞,赵霞,张建强..改性焦粉对氟离子吸附热力学及机理[J].环境工程学报,2011,5(7):1633-1636,4.基金项目
甘肃省自然科学基金资助项目(0916RJZA011)；甘肃省教育厅研究生导师资助项目(0703-09) （0916RJZA011）
