摘要
通过在不同温度下的静态吸附实验,研究了二硝酰胺铵(ADN)在树脂DX上的吸附热力学及动力学特性;通过实验测定了28~50℃的等温吸附线和吸附动力学数据,并分别用Langmuir和Freundlich模型对实验数据进行了拟合。结果表明,树脂DX对水溶液中ADN的吸附符合Freundlich等温吸附方程,该吸附过程的吉布斯自由能变(ΔG)<0,熵变(ΔS)>0,吸附过程可自发进行,不同吸附量下的吸附焓变(ΔH)>0,吸附为吸热过程;树脂DX对ADN的吸附属于快速平衡型,前30min大量ADN被吸附在树脂DX上,60min后吸附趋于平衡,吸附过程符合拟二级动力学方程;该吸附工艺操作简便,树脂DX吸附效率高,可重复利用,成本低。
Thermodynamic and kinetic characteristics of the adsorption of ammonium dinilramide （ADN） on resin DX were studied through static adsorption experiments at different temperatures. The adsorption isotherms arid ad sorption kinetic data at 28 50℃ were measured by experiments arid the experimental data were fitted by Langmuir arid Freundlich models, respectively, The results show that the adsorption of ADN in the aqueous solution by resin DX is in accordance with the Freundlich isothermal adsorption equation, and the Gibbs free energy change（△G）〉0 and enthalpy change（△S）〉 0 of the adsorption process indicate that the adsorption process can be carried out spon taneously, The adsorption of △H〉 0 under different adsorption quantity indicates that the adsorption is an endo thermic process. The adsorption of resin DX on ADN belongs to the fast equilibrium type. A large amount of ADN is adsorbed on resin DX in the first 30 minutes. After 60 minutes, the adsorption tends to balance, and the adsorp tion process conforms to the quasi second order kinetic equation. The adsorption process is simple and convenient to operate, the resin DX,with low cost, has high adsorption efficiency and can be reused.
作者
潘永飞
汪伟
汪营磊
闫峥峰
赵宝东
姬月萍
PAN Yong-fei;WANG Wei;WANG Ying-lei;YAN Zheng-feng;ZHAO Bao-dong;JI Yue-ping(Xi＇an Modern Chemistry Research Institute,Xi＇an 710065,China)
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2018年第4期382-387,共6页
Chinese Journal of Explosives & Propellants
