摘要
以N-亚硝基苯胲铵在钛铁矿表面的吸附特性为研究对象,考察药剂pH值、药剂浓度、矿浆温度对吸附动力学及热力学的影响.动力学研究结果表明,N-亚硝基苯胲离子在钛铁矿表面的吸附动力学符合准一级动力学方程,矿物表面活性质点在矿物表膜中的扩散是吸附过程的控制性步骤.吸附热力学研究结果表明,药剂吸附符合Langmuir单分子层吸附模型,吸附过程的ΔG~θ随温度上升而降低,但随药剂浓度的增加而增加.平均吸附能结果表明,在所研究的条件下药剂在钛铁矿表面的吸附属于离子交换吸附模式.
The adsorption properties of cupferron on ilmenite were taken as the object. Thermodynamic and kinetic characteristics during adsorption process were studied in detail by varying the p H value,reagent concentration and adsorption time. Kinetic studies showed that the adsorption of cupferron onto ilmenite accord well with pseudo-first order kinetic equation. The mineral activity sites diffusion in the mineral surface film was the rate-determining step in the adsorption process. The results of adsorption thermodynamics indicated that Langmuir monolayer adsorption model could explain the adsorption process well. The change of ΔG~θ for adsorption decreased with the temperature increasing and increased with the reagent concentration. The mean adsorption energy research demonstrated that the adsorption mode at low temperature is of ion-exchange type.
作者
刘明宝
李皓琳
裴丹
李航
马英强
印万忠
LIU Mingbao;LI Haolin;PEI Dan;MA Yingqiang;YIN Wanzhong(Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo,Shaanxi 726000,China;College of Chemical Engineering and Modem Material,Shangluo University,Shangluo,Shaanxi 726000,China;College of Zijin Mining,Fuzhou University,Fuzhou,Fujian 350116,China)
出处
《福州大学学报（自然科学版）》
CAS
北大核心
2018年第4期554-560,共7页
Journal of Fuzhou University(Natural Science Edition)
基金
陕西省自然科学基金资助项目(2016JQ5059)
陕西省教育厅重点科研基金资助项目(16JS030)
陕西省大学生创新创业训练资助项目(20172732)
