摘要
对阜新天然丝光沸石进行NaOH-Al2(SO4)3改性,改性沸石用于高氟废水的除氟实验,并采用扫描电镜(SEM)、能谱(EDS)和X射线衍射(XRD)对样品的形貌进行了表征。分别用动力学和热力学模型对吸附过程进行了模拟,结果表明:改性沸石的除氟效果达到94.78%,吸附过程接近准二级动力学速率方程,且Freundlich等温线吸附模型能较好地模拟吸附热力学过程;由吸附过程的热力学函数吉布斯自由能ΔG0<0,焓变ΔH0<0,熵变ΔS0<0,表明吸附过程属于自发的和放热的。
The Fuxin natural mordenites were modiifed by NaOH-Al2（SO4）3 then were used to remove lfuoride in the wastewater , the results were characterized by SEM, EDS and XRD. The adsorption process was dealed with the model of kinetics and thermodynamics, the results showed that： the effect of removing lfuoride has reached 94.7%, the adsorption process could be well described by the accurate secondary kinetic rate equation and the Freundlich isotherm adsorption model; some important thermodynamics functions such asΔG0〈0,ΔH0〈0 andΔH0〈0 were calculated and all the negative value showed that adsorption process is spontaneous and exothermic.
出处
《非金属矿》
CAS
CSCD
北大核心
2014年第5期66-69,共4页
Non-Metallic Mines
基金
国家自然科学基金(51372108)
辽宁省教育厅基金资助项目(2012114)
关键词
沸石
改性
吸附
动力学
热力学
zeolite
modiifcation
adsorption
kinetic
thermodynamics
