【摘要】 研究了煤矸石微珠煅烧温度、用量、染料浓度和吸附时间对甲基紫和孔雀石绿吸附性能的影响。由喷雾干燥法制备出煤矸石微珠坯体,再经后续煅烧得到煤矸石多孔微珠。研究表明,微珠表面分布有片状组织并杂乱排布,蓬松多孔。随煅烧温度(800~1 000℃)的升高,煤矸石微珠对甲基紫和孔雀石绿的吸附量降低,800℃时微珠对甲基紫和孔雀石绿的吸附量和去除率分别为16.2mg/g、97.2%和9.5mg/g、94.6%;微珠对甲基紫和孔雀石绿的吸附量随吸附时间和初始浓度的增加而增加,但随微珠用量的增加而降低;吸附过程均可用伪二级动力学模型描述;对甲基紫的吸附过程符合Langmuir模型,RL值介于0与1之间,为优惠吸附;对孔雀石绿的吸附过程符合Freunchlich模型,1/n值介于0与1之间,也为优惠吸附。用煤矸石滤柱过滤甲基紫和孔雀石绿,其吸附量和去除率分别为15.1963mg/g、99.1061%和8.8284mg/g和94.5903%。更多还原

【Abstract】 In this paper,effects of calcining temperature,microspheres dosage,concentration of dye and contact time on the adsorption properties of methly violet and malachite green of coal gangue microspheres were investigated.Coal gangue microspheres were made by spray drying method and subsequent calcination.Researches showed that the surface of coal gangue microspheres was fluffy and porous,the flaky tissue was mixed and disorderly arrangement on the surface.With the increase of calcining temperature(800-1 000 ℃),the adsorption capacity on methly violet and malachite green was decreased,and the adsorption capacity and removal efficiency of methyl violet for microspheres calcined after 800 ℃ were 16.2 mg/g and 95.5%,respectively.And for malachite green,the adsorption capacity and removal efficiency were 9.5 mg/g and 94.6%.With the increase of contact time and initial concentration,the adsorption capacity of methyl violet and malachite green for microspheres was increased,whereas with the increase of coal gangue dosage,the adsorption capacity was decreased.The progress of adsorption could be described by the pseudo-second-order kinetic model.The adsorption on methyl violet conforms to the Langmuir model,and value of RL(0<RL<1)indicates that the Langmuir isotherm is favorable.The adsorption on malachite green conforms to the Freundlich model,and value of 1/n(0<1/n<1)indicates that the Freundlich isotherm is favorable.When methyl violet and malachite green were filtered with coal gangue filter,the adsorption capacity and removal efficiency of methyl violet were 15.1963 mg/g and99.1061% and the adsorption capacity and removal efficiency of malachite green were 8.8284 mg/g and94.5903%.更多还原