摘要
研究泥煤从废水中吸附镍的热力学特性。等温吸附平衡数据符合Freundlich和Langmuir等温吸附模型,吸附速率常数k随温度的升高降低,吸附活化能Ea为-12.24kJ/mol,吸附的频率因子A=1.51×10-5s-1。泥煤吸附镍的吸附焓、吸附自由能、吸附熵表明,镍在泥煤上的吸附为自发不可逆的放热过程。
The features of nickel adsorbed on the peat are thermodynamically investigated. Freundlich and Langmuir equations are fit to describe the data of the adsorption isotherm. The adsorption rate constant k is decreased with the temperature increase, and activation energy of adsorption Ea = - 12.24kJ/mol and frequency factor A is 1.51×10^-5^s-1. It is indicated by the sorption enthalpy, free energy and entropy of nickel adsorbed on peat that the adsorption process is a spontaneous and irreversible with heat evolution.
出处
《有色金属》
CSCD
北大核心
2008年第1期113-116,共4页
Nonferrous Metals
基金
教育部留学回国人员科研启动基金资助项目([2006]331号)
核资源与环境教育部重点实验室科研基金资助项目(051104)
东华理工学院博士基金资助项目(DHB0504)
关键词
冶金过程物理化学
镍
热力学
泥煤
吸附
physicochemistry on metallurgy
nickel
thermodynamic
peat
adsorption
