摘要
以废弃生物质木屑作为原料,K_(2)C_(2)O_(4)为活化剂,鸡蛋壳为模板剂制备介孔活性炭。采用扫描电镜(SEM)、X射线光电子能谱仪(XPS)和N_(2)吸附-脱附等温线等方法对活性炭的结构进行表征,并考察了活性炭对刚果红(CR)染料的吸附性能。结果表明,当木屑与K_(2)C_(2)O_(4)的质量比为1∶1.5,添加与木屑等量的鸡蛋壳,活化温度为800℃、活化时间为2 h时,所制备的活性炭AC-1比表面积为2009 m^(2)/g,介孔率可达70.5%。AC-1对CR的最佳吸附容量高达862.1 mg/g。吸附过程是以化学吸附为主的单层复合吸附过程,符合准二级动力学模型和Langmuir等温模型。
Using waste biomass sawdust as raw material,K_(2)C_(2)O_(4)as activator and egg shell as template,mesoporous activated carbon was prepared.The structure of activated carbon was characterized by scanning electron microscope(SEM),X-ray photoelectron spectroscopy(XPS)and N_(2)adsorption-desorption experiments,and the adsorption performance of activated carbon for Congo red dye was investigated.The results show that when the mass ratio of sawdust to K_(2)C_(2)O_(4)is 1∶1.5,add an equal amount of egg shell to sawdust,the activation temperature is 800℃,and the activation time is 2 h,the specific surface area of AC-1 is 2009 m^(2)/g,and the mesoporous rate is 70.5%.The optimal adsorption capacity of AC-1 for CR is as high as 862.1 mg/g.The adsorption process is a single-layer composite adsorption process dominated by chemical adsorption.It conforms to the quasi-second-order kinetic model and Langmuir isotherm model.
作者
张诗苑
闫宇星
齐有
曹青
ZHANG Shi-yuan;YAN Yu-xing;QI You;CAO Qing(College of Chemistry,Taiyuan University of Technology,Taiyuan 030024,China;College of Chemical Engineering and Technology,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《应用化工》
CAS
CSCD
北大核心
2024年第5期1113-1118,共6页
Applied Chemical Industry
基金
山西省重点研发计划高新技术领域项目(201703D121037-1)。
