伊利石基铁/锰氧化物制备及As(V)吸附性能研究  

Preparation of Illite-Based Fe/Mn Oxides and Study of As(V)Adsorption Performance

作　　者：史默涵 杜玉成[1] 周琴琴 林彭辉 李扬[1] Shi Mohan;Du Yucheng;Zhou Qinqin;Lin Penghui;Li Yang(Department of Materials and Manufacturing,Beijing University of Technology,Beijing 100124)

机构地区：[1]北京工业大学材料与制造学部,北京100124

出　　处：《非金属矿》2023年第3期58-62,共5页Non-Metallic Mines

基　　金：国家自然科学基金(51974011);宁夏回族自治区重点研发计划项目(2019BFG02032)。

摘　　要：为提高伊利石对As(V)的吸附性能,以FeCl_(3)·6H_(2)O为铁源、KMnO_(4)为锰源、NH_(3)·H_(2)O为沉淀剂,十二烷基苯磺酸钠为模板剂,采用水热法在伊利石表面分别制备了纳米球状结构Fe_(2)O_(3)、纳米线状结构MnO_(2);采用X射线衍射(XRD)、扫描电镜(SEM)、X射线光电子能谱(XPS)等技术对样品进行表征分析。制备的Fe_(2)O_(3)/伊利石和MnO_(2)/伊利石两种样品的比表面积分别为54 m^(2)/g和62 m^(2)/g。在室温下,pH为7,MnO_(2)/伊利石样品用量为50 mg,反应70 min,MnO_(2)/伊利石对As(V)的吸附容量为78.2 mg/g,样品对As(V)的吸附复合Langmuir等温吸附模型,主要为化学吸附,吸附去除率达95%以上。The hydrothermal method was used to prepare the nano-spherical structure Fe_(2)O_(3) and nano-linear structure MnO_(2) on the surface of illite in order to enhance its ability to adsorb As(V).The iron source was FeCl_(3)·6H_(2)O,the manganese source was KMnO_(4),the precipitant was NH_(3)·H_(2)O,and the templating agent was sodium dodecylbenzene sulfonate.XRD,SEM and XPS were used to characterize the samples.Fe2O3/illite and MnO_(2)/illite samples had specific surface areas of were 54 m^(2)/g and 62 m^(2)/g,respectively.MnO_(2)/illite samples were utilized to adsorb arsenic.The reaction was conducted for 70 minutes at room temperature,pH value of 7,and dosage of 50 mg.As(V)had an adsorption capacity of 78.2 mg/g,the As(V)adsorption by MnO_(2)/illite was consistent with Langmuir isothermal adsorption model,which focused mostly on chemical adsorption,and the elimination rate was more than 95%.

关 键 词：Fe_(2)O_(3)/伊利石 纳米线状结构MnO_(2) AS(V) 吸附 

分 类 号：P619.231[天文地球—矿床学] X52[天文地球—地质学]