苯甲羟肟酸和水杨醛肟在白云石表面的吸附特性研究  

ADSORPTION CHARACTERISTICS OF BENZOHYDROXAMIC ACID AND SALICYLALDOXIME ON DOLOMITE SURFACE

作　　者：刘明宝 鱼博 樊兴 强旭旭 印万忠[3] 

机构地区：[1]陕西省尾矿资源综合利用重点实验室,陕西商洛726000 [2]商洛学院化学工程与现代材料学院,陕西商洛726000 [3]东北大学资源与土木工程学院,沈阳110004

出　　处：《离子交换与吸附》2017年第6期558-566,共9页Ion Exchange and Adsorption

基　　金：陕西省自然科学基金(No.2016JQ5059);陕西省教育厅重点科研项目(No.16JS030)

摘　　要：以苯甲羟肟酸和水杨醛肟在白云石表面的吸附动力学、扩散模型和药剂的量化特性研究为切入点,系统探讨了药剂的同分异构效应对其吸附特性及吸附机理的影响。吸附特性研究结果表明,苯甲羟肟酸和水杨醛肟在白云石表面的吸附量均随p H值的变化表现出先上升后下降的趋势,苯甲羟肟酸的饱和吸附量远远大于水杨醛肟。动力学模型研究显示,二者在白云石表面的吸附均符合准二级动力学模型且水杨醛肟的吸附动力学参数大于苯甲羟肟酸。药剂的量化特性研究表明,苯甲羟肟酸在白云石表面以五元螯合环的形式吸附,而水杨醛肟则以离子键的形式与矿物表面发生作用。研究结果为白云石矿物的高效浮选分离提供了一定的理论基础。The isomer effects of reagents on adsorption behavior and mechanism for benzohydroxamic acid （BHA） and salicylaldoxime （SLO） on dolomite surface was investigated from the point of view of adsorption kinetics, diffusion model and quantification characteristic. The adsorption behavior indicated that the saturated adsorption capacity was first increased and then decreased along with the changing of pH value for the studied range, but the equilibrium adsorption amount of BHA is far more than that of SLO. Adsorption dynamic model studies showed that the adsorption behavior agreed well with the Pseudo-second-order model for both BHA and SLO, and adsorption rate constant of SLO was greater than that of BHA. The results of quantification characteristics suggested that the BHA was adsorbed onto dolomite surface by forming five-member chelating ring with Ca^2＋, Mg^2＋, but SLO was adsorbed according to the formation of ionic bond with Ca^2＋, Mg^2＋. The investigations in this paper lay a good foundation for the flotation fundamental theories of dolomite.

关 键 词：动力学 药剂吸附 量化特性 

分 类 号：TD97[矿业工程—选矿]