摘要
考察了pH和搅拌时间对含苯环螯合捕收剂N-亚硝基苯胲铵和N-亚硝基萘胲铵在金红石表面吸附速率的影响,研究了吸附动力学,进行了量子化学及立体化学分析.结果表明,N-亚硝基萘胲铵在金红石表面的最大吸附量大于N-亚硝基苯胲铵,但N-亚硝基苯胲铵在金红石表面的吸附速率大于N-亚硝基萘胲铵.两种药剂的吸附均符合准一级动力学方程,矿物表面活性点离子在矿物表膜中的扩散为吸附的控制步骤.N-亚硝基萘胲铵分子中苯环具有吸电子共轭效应,会影响键合原子的电子云密度和分子结构,从而影响药剂的吸附速率和吸附量.
The effects of slurry pH and stirring time on adsorption rate of chelating collectors containing benzene, namely cupferron and neocupferron, onto rutile surface were researched. Adsorption kinetics, quantum chemistry and stereochemistry were studied. The results showed that the maximum adsorption capacity of neocupferron on rutile was higher than that of cupferron, but the adsorption rate was in the reverse order. The pseudo-first order kinetic equation can fit the adsorption isotherms well for both reagents. The diffusion of activity sites in mineral surface film was the rate-limited step during the adsorption. The number of benzene ring in the molecule can affect the electron cloud density on the bonding atoms and the molecular structure, and then influence the adsorption capacity and rate of the reagents.
作者
刘明宝
鱼博
印万忠
Mingbao LIU;Bo YU;Wanzhong YIN(College of Chemical Engineering and Modern Material, Shangluo University, Shangluo, Shaanxi 726000, China;Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, Shangluo, Shaanxi 726000, China;College of Resources and Civil Engineering, Northeasten University, Shenyang, Liaoning 110004, China)
出处
《过程工程学报》
CAS
CSCD
北大核心
2018年第2期399-404,共6页
The Chinese Journal of Process Engineering
基金
陕西省自然科学基金资助项目(编号:2016JQ5059)
陕西省教育厅重点科学研究计划资助项目(编号:16JS030)
关键词
金红石
浮选
捕收剂
吸附动力学
rutile
flotation
collector
adsorption kinetics
