摘要
采用批式振荡吸附法研究了钢渣吸附Pb2+的动力学。研究结果表明,钢渣吸附Pb2+的动力学控制步骤(简称动力学控制步骤)随实验条件的变化而变化:钢渣粒径大于120μm、振荡器转速小于150r/min或Pb2+初始质量浓度小于150mg/L时,孔扩散是动力学控制步骤;钢渣粒径小于120μm、振荡器转速大于150r/min或Pb2+初始质量浓度大于150mg/L时,表面扩散是动力学控制步骤;钢渣对Pb2+的吸附反应是二级反应,其吸附速率为13.26g/(mg.min)。
The adsorption kinetics of Pb^2＋ on steel slag was investigated by batch oscillating adsorption method. The results show that the kinetic controlling processes change with the experimental conditions： When the particle diameter of steel slag is more than 120 μm, the rotary speed of oscillator is less than 150 r/min, or the initial Pb^2. mass concentration is less than 150 mg/L, pore diffusion is the controlling process; When the particle diameter of steel slag is less than 120μm, the rotary speed of oscillator is more than 150 r/min, or the initial Pb^2＋ mass concentration is more than 150 mg/L, surface diffusion is the controlling process; And the adsorption reaction of Pb^2. on steel slag is a second-order reaction with 13.26 g/（mg·min） of adsorption rate.
出处
《化工环保》
CAS
CSCD
北大核心
2007年第3期214-217,共4页
Environmental Protection of Chemical Industry
基金
成都信息工程学院发展基金资助项目(KYTZ200701)
关键词
钢渣
吸附
铅离子
动力学
steel slag
adsorption
lead ion
kinetics
