摘要
研究了D113大孔树脂吸附Ni2+的动力学与热力学的特性。动力学研究表明,在298K温度下,D113大孔树脂对Ni2+的吸附符合拟一级动力学方程和拟二级动力学方程,颗粒扩散过程为吸附的控速步骤。热力学研究表明,在实验温度下,D113大孔树脂对Ni2+的吸附符合Langmuir等温方程,吸附焓变ΔHθ=15.1306kJ/mol,熵变ΔSθ=0.1002kJ/mol.K,反应吉布斯自由能ΔGθ随温度升高向负方向增加。热力学参数表明吸附过程为吸热和自发的。
Adsorption kinetics and thermodynamics of Ni^2＋ in solution was studied. Kinetic studies indicated that Ni^2＋ adsorption onto resin D113 conforms to pseudo-first-order equation and pseudo-second-order equation. The adsorption was controlled by pore diffusion. In the experimental temperature, thermodynamic Studies indicated that Ni^2＋ adsorption onto resin D113 conforms to Langmuir adsorption isotherm. Heat of adsorption value of 15.1306kJ/mol indicated the radioactive nature of adsorption process. A decrease of Gibbs free energy with increasing temperature also indicated the spontaneous nature of the process.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2009年第10期49-52,共4页
Environmental Science & Technology
基金
辽宁省教育厅基金(202213110)
关键词
大孔树脂
吸附
动力学
热力学
吸附等温线
macroporous resin
absorption
kinetics
thermodynamic
thermodynamics isotherm
