高比表面芦苇活性炭的制备及其对亚甲基蓝的吸附性能研究  

Preparation of reed activated carbon with high specific surface area and its adsorption performance for methylene blue

作　　者：庞亚辉 蒋新元[1] 唐玉莲[1] 廖媛媛[1] 何思宜 姜灵坤 PANG Ya-hui;JIANG Xin-yuan;TANG Yu-lian;LIAO Yuan-yuan;HE Si-yi;JIANG Ling-kun(College of Materials Science and Engineering,Central South University of Forestry and Technology,Changsha 410004,China;Zhuzhou Ecological Environment Monitoring Center of Hunan Province,Zhuzhou412000,China)

机构地区：[1]中南林业科技大学材料科学与工程学院,湖南长沙410004 [2]湖南省株洲生态环境监测中心,湖南株洲412000

出　　处：《应用化工》2023年第10期2836-2840,共5页Applied Chemical Industry

基　　金：湖南省科技创新重大项目(2021NK1010)。

摘　　要：以芦苇秸秆为原料,KOH为活化剂,通过单因素实验及正交实验优化芦苇活性炭的制备工艺,测定最优工艺下制备的活性炭对亚甲基蓝的吸附性能和吸附动力学,并进行红外光谱分析、BET比表面积结构分析。结果表明,最佳制备工艺为700℃、20%KOH质量分数、3 h时制备的芦苇活性炭。该活性炭理论最大吸附量为648.77 mg/g,Langmuir等温吸附曲线(R 2=0.9820)和二级动力学吸附曲线(R 2=0.9808)能够更好地描述吸附过程。红外光谱分析结果表明,所制备的活性炭中生成了酰胺基团。BET比表面积测定结果表明,最优工艺下制备的芦苇活性炭的比表面积为1183.40 m^(2)/g,总孔容为0.59 cm 3/g,平均孔径为2.00 nm。Using reed straw as raw material and KOH as activator,the preparation process of reed activated carbon was optimized by single factor test and orthogonal test.The adsorption performance and adsorption kinetics of methylene blue on activated carbon prepared under the optimal process were determined,and the infrared spectrum analysis and BET specific surface area structure analysis were carried out.The results showed that the optimum preparation process was 700℃,20%KOH mass fraction and 3 h.The theoretical maximum adsorption capacity of activated carbon is 648.77 mg/g,and Langmuir isotherm adsorption curve(R 2=0.9820)and second-order kinetic adsorption curve(R 2=0.9808)can better describe the adsorption process.The results of infrared spectrum analysis showed that amide groups were formed in the prepared activated carbon.The BET specific surface area measurement results show that the specific surface area of reed activated carbon prepared under the optimal process is 1183.40 m^(2)/g,the total pore volume is 0.59 cm 3/g,and the average pore diameter is 2.00 nm.

关 键 词：芦苇 氢氧化钾 活性炭 吸附 亚甲基蓝 

分 类 号：TQ424.1[化学工程]