磁性煤气化渣的制备及吸附特性研究  

Study on the preparation and adsorption characteristics of magnetic coal gasification slag

作　　者：李润瑶 张恩山 孙晨旭 冯庆 申婷婷[1] 孙静[1] LI Runyao;ZHANG Enshan;SUN Chenxu;FENG Qing;SHEN Tingting;SUN Jing(School of Environmental Science and Engineering,Qilu University of Technology(Shandong Academy of Sciences),Jinan 250353,China)

机构地区：[1]齐鲁工业大学(山东省科学院)环境科学与工程学部,山东济南250353

出　　处：《齐鲁工业大学学报》2024年第1期57-66,共10页Journal of Qilu University of Technology

基　　金：国家级大学生创新创业训练计划项目(202110431079);生物基材料与绿色造纸国家重点实验室项目(齐鲁工业大学(山东省科学院))(ZZ20210124);国家自然科学基金项目(21908118)。

摘　　要：以固体废弃物煤气化渣为原料,采用酸浸与化学共沉淀法制备磁性煤气化渣(MCGS),并利用扫描电子显微镜(SEM)、傅立叶变换红外光谱仪(FTIR)、X射线衍射仪(XRD)对制备的MCGS进行了表征。研究结果表明:MCGS呈现出粗糙、多孔的结构,而且其表面与孔道中负载了分布较为均匀的、具有反尖晶石结构的Fe3O4粒子。进而以罗丹明B(RhB)为目标污染物,对其吸附性能进行了研究,当溶液pH为3.0,吸附时间为200 min, RhB初始质量浓度为200 mg/L,MCGS用量为2.0 g/L时,RhB的去除率为90.66%,吸附容量为90.66 mg/g。吸附等温线与吸附动力学研究结果表明:MCGS对RhB的吸附动力学与准二级动力学模型相吻合,吸附等温线与Langmuir相一致,说明该过程是一个单分子层吸附、以化学吸附为主的过程。该研究为煤气化渣的资源化利用提供了新的技术与方法。Magnetic coal gasification slag(MCGS)was prepared by acid leaching and chemical coprecipitation process,and further characterized by scanning electron microscopy(SEM),Fourier transform infrared spectroscopy(FTIR)and X-ray diffraction(XRD).The results showed that the coal gasification slag had a rough and porous structure,and the surface and pores were loaded with Fe 3 O 4 particles with reverse spinel structure,which indicated that the magnetic coal gasification slag had been successfully prepared.Then,RhB was taken as the target pollutant to study its adsorption performance.The removal efficiency and adsorption capacity of RhB were 90.66%and 90.66 mg/g under the optimal conditions of pH 3.0,the adsorption time 200 min,the initial concentration of RhB 200 mg/L,and the dosage of magnetic coal gasification slag 2.0 g/L.Moreover,the adsorption isotherm and adsorption kinetics results demonstrated that the adsorption process of RhB by MCGS was in agreement with pseudo second-order kinetic and Langmuir isotherm,indicating that the process was a single molecular layer adsorption dominated by chemisorption.The research provides a new technique and method for the resource utilization of coal gasification slag.

关 键 词：固体废弃物 煤气化渣 磁性材料 吸附机理 RHB 

分 类 号：X74[环境科学与工程—环境工程]