不同沉淀剂合成的三种形貌MgO对活性蓝19的吸附研究  

Adsorption for active blue 19 by MgO of three kinds of morphology synthesized with different precipitants

作　　者：吴茜茜 赵宇[1] 戴丹[1] 马倩[1] WU Xi-xi;ZHAO Yu;DAI Dan;MA Qian(Wuhan University Testing Center,Wuhan 430000,China)

机构地区：[1]武汉大学测试中心,湖北武汉430000

出　　处：《化学研究与应用》2020年第12期2259-2267,共9页Chemical Research and Application

摘　　要：本研究仅通过改变沉淀剂的种类,就成功合成了多面体形、正方体形和羽毛形的MgO。因为形貌的改变带来的高比表面积使得三种MgO颗粒都展现了对活性蓝19的良好的吸附性能。该吸附过程可以用伪二级动力学模型和Langmuir等温吸附模型来描述。由吸附热力学可知,该吸附过程为自发进行,且是吸热的过程。循环实验说明,在进行5次循环后,三种吸附剂仍然保有较高的染料去除率,提高了该吸附剂的实际应用前景。MgO polyhedron,cube and feather-like structure were successfully synthesized just by changing the precipitant type.The high specific surface area,obtained by morphology changing,endowed the three kinds of MgO with good absorption properties for active blue 19.The adsorption process could be described by Pseudo second-order kinetics model and the Langmuir adsorption isotherm model.The adsorption thermodynamics showed that the adsorption process was spontaneous and endothermic.And the recycle experiments demonstrated that the three adsorbents still maintained high remove rate even after 5 runs,which promoted the practical application of the adsorbents.

关 键 词：活性蓝19 沉淀剂 MGO 吸附 

分 类 号：O647[理学—物理化学]