改性金刺梨渣生物炭吸附亚甲基蓝性能研究  

Study on Adsorption of Methylene Blue by Modified Biochar From Rosa Roxburghii Residue

作　　者：张雨薇 李雪雪 张晓娟 张玉涛 ZHANG Yu-wei;LI Xue-xue;ZHANG Xiao-juan;ZHANG Yu-tao(College of Chemistry and Chemical Engineering,Anshun College,Anshun Guizhou 561000,China;Engineering Technology Center of Control and Remediation of Soil Contamination of Guizhou Provincial Science&Technology Bureau,Anshun Guizhou 561000,China)

机构地区：[1]安顺学院化学化工学院,贵州安顺561000 [2]贵州省科技厅土壤控制与修复工程技术中心,贵州安顺561000

出　　处：《辽宁化工》2023年第12期1736-1740,1744,共6页Liaoning Chemical Industry

基　　金：安顺学院2022年国家级大学生创新创业训练计划项目(项目编号:202210667024);安顺市科技创新平台建设计划项目(安市科平[2023]5号);安顺学院教学研究项目(编号:2022LHZX052);贵州省高等学校多孔材料与绿色催化创新团队(黔教技[2023]086号)。

摘　　要：采用KOH活化法制备改性金刺梨渣生物炭(RRT-K),并以亚甲基蓝(MB)为目标降解物,考察不同吸附时间、生物炭投加量、MB初始浓度、pH对RRT-K吸附MB的影响。通过扫描电镜(SEM)、傅里叶红外光谱(FTIR)及N2-吸附脱附等对生物炭的结构、形貌进行表征,并对其吸附动力学和等温吸附进行探讨。结果表明,与未改性炭(RRT)相比,RRT-K呈多孔结构,比表面积从3.3184 m^(2)·g^(-1)增加到4.9442 m^(2)·g^(-1)。吸附过程符合准二级动力学,吸附行为符合Langmuir模型,RRT-k对MB的吸附主要是以化学吸附为主的单层吸附。The modified rosa roxburghii residue biochar(RRT-K)was prepared by KOH activation method.Methylene blue(MB)was used as the target degradation substance.The effects of adsorption time,dosage of biochar,initial concentration of MB and pH on the adsorption of MB by RRT-K were investigated.The structure and morphology of biochar were characterized by scanning electron microscopy(SEM),Fourier infrared spectroscopy(FTIR)and N2-adsorption and desorption,and the adsorption kinetics and isothermal adsorption were discussed.The results showed that RRT-K had a porous structure compared with unmodified carbon(RRT),and its specific surface area increased from 3.3184 m^(2)·g^(-1)to 4.9442 m^(2)·g^(-1).The adsorption process conformed to the quasi second-order kinetics,and the adsorption behavior conformed to the Langmuir model.The adsorption of MB by RRT-K was mainly a single layer adsorption based on chemical adsorption.

关 键 词：金刺梨渣 生物炭 亚甲基蓝 吸附 

分 类 号：TQ424.1[化学工程]