超声波协同碱改性飞灰并探究对Mn^(2+)的吸附  

Modification of the fly ash by ultrasonic-assisted alkali and its adsorption of Mn^(2+)

作　　者：赵维维 王博涛 刘天成 ZHAO Wei-wei;WANG Bo-tao;LIU Tian-cheng(School of Chemistry and Environment,Yunnan Minzu University,Kunming 650500,China;Science and Technology Innovation Team of Industrial Waste Gas Green Purification Technology in Yunnan Universities,Yunnan Minzu University,Kunming 650500,China)

机构地区：[1]云南民族大学化学与环境学院,云南昆明650500 [2]云南民族大学云南省高校工业废气绿色净化技术科技创新团队,云南昆明650500

出　　处：《云南民族大学学报（自然科学版）》2023年第4期436-442,共7页Journal of Yunnan Minzu University:Natural Sciences Edition

基　　金：国家自然科学基金(51568068).

摘　　要：随着城市化进程的加快,生活垃圾焚烧飞灰的产量日渐增多,将飞灰改性为吸附剂成为飞灰资源化的途径之一.通过超声波协同碱改性飞灰,并探究其对Mn^(2+)的吸附效果,通过XRD、XRF、SEM、FTIR等方法对材料进行表征.结果表明:当添加剂为Ca(OH)_(2)、碱灰比0.45、超声波处理功率640 W、超声波时间30 min时,改性飞灰对Mn^(2+)吸附去除率达到88.33%.吸附等温模型、动力学模型结果表明飞灰对Mn^(2+)的吸附过程符合Langmuir单分子层吸附和二级动力学吸附过程.With the acceleration of urbanization,the output of domestic waste incineration fly ash is increasing day by day.Modifying fly ash into adsorbent has become one of the ways of fly ash recycling.In this paper,fly ash was modified by alkali in cooperation with ultrasonic,and its adsorption effect on Mn^(2+) was explored.The materials were characterized by XRD,XRF,SEM and FTIR.The results show that when the additive is Ca(OH)_(2),alkali ash ratio is 0.45,ultrasonic treatment power is 640 w and ultrasonic time is 30 min,the adsorption and removal rate of Mn^(2+) by modified fly ash reaches 88.33%.The results of adsorption isothermal model and kinetic model show that the adsorption process of Mn^(2+) by fly ash conforms to Langmuir monolayer adsorption and second-order kinetic adsorption process.

关 键 词：飞灰 超声波 改性 重金属吸附 

分 类 号：X703[环境科学与工程—环境工程]