煤矸石微珠的制备及其对甲基紫和孔雀石绿的吸附性能  

Preparation of coal gangue microspheres and its adsorption properties of methyl violet and malachite green in waste water

作　　者：潘一鸣 闫姝 唐欣悦 王庆刚 王修慧[1] 杨金龙[1,2,3] PAN Yiming;YAN Shu;TANG Xinyue;WANG Qinggang;WANG Xiuhui;YANG Jinlong(School of Materials Science and Engineering,Dalian Jiaotong University,Dalian 116028,China;State Key Laboratory of New Ceramics and Fine Processing,School of Materials Science and Engineering,Tsinghua University,Beijing 100084,China;School of Civil Engineering,Helbei University of Engineering,Handan 056038,China)

机构地区：[1]大连交通大学材料科学与工程学院,辽宁大连116028 [2]清华大学材料学院新型陶瓷与精细工艺国家重点实验室,北京100084 [3]河北工程大学土木工程学院,河北邯郸056038

出　　处：《功能材料》2018年第6期1-8,共8页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51702184;51572140);中国博士后科学基金资助项目(2017M610085)

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%。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 investi-gated. Coal gangue microspheres were made by spray drying method and subsequent calcination. Researches showed thai. the surface of coal gangue microspheres was fluffy and porous, the flaky tissue was mixed and Dis orderly arrangement on the surface. With the increase of calcining temperature （800-1000℃）, 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 9.5.5%,respectively. And for mala-chite green, the adsorption capacity and removal efficiency were 9.5mg/g and 94.6%. With the increase of con tact 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 fa vorable. 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. 1963mg/g and 99.1061% and the adsorption capacity and removal efficiency of malachite green were 8.8284mg/g and 94.5903%.

关 键 词：煤矸石 微珠 甲基紫 吸附性能 

分 类 号：TQ424.29[化学工程]