高炉渣基类水滑石对磷酸根离子吸附性能的研究  

Study on the Adsorption Performance of Blast Furnace Slag-Based Hydrotalcite to Phosphate Ions

作　　者：杨慧英 高文艳 赵斯琴[1,2] 长山 YANG Hui-ying;GAO Wen-yan;ZHAO Si-qin;Changshan(College of Chemistry and Environmental Science,Inner Mongolia Normal University,Hohhot 010022,China;Inner Mongolia Key Laboratory of Environmental Chemistry,Hohhot 010022,China)

机构地区：[1]内蒙古师范大学化学与环境科学学院,内蒙古呼和浩特010022 [2]内蒙古自治区环境化学重点实验室,内蒙古呼和浩特010022

出　　处：《内蒙古师范大学学报（自然科学版）》2022年第4期434-440,共7页Journal of Inner Mongolia Normal University(Natural Science Edition)

基　　金：国家自然科学基金资助项目(21367020);内蒙古自治区高等学校科学研究资助项目(NJZZ19017)。

摘　　要：以内蒙古自治区包头市钢铁厂高炉渣为前驱体,采用共沉淀法合成了高炉渣基类水滑石,通过XRD、SEM、BET、BJH、DTA-TG等检测手段对样品进行表征,研究其对磷酸根离子的吸附性能。结果表明:实验合成了片状晶体结构的类水滑石,属于典型的LangmuirⅣ型介孔结构,比表面积为26.14 m^(2)·g^(-1);所合成类水滑石对磷酸根离子具有较强的吸附性能,吸附符合准二级动力学模型,属于多分子层吸附,是自发吸热过程。其中样品HTlc-2加入量为20 mg时,对25 mL的3000 mg·L^(-1)磷酸根离子吸附率为90.16%,吸附量可达2626.91 mg·g^(-1)。The blast furnace slag-based hydrotalcite was synthesized with co-precipitation method by using blast furnace slag from Inner Mongolia BaoTou Steel as precursor in the research.To investigate the adsorption properties to phosphate ions,the samples were characterized with X-ray diffraction(XRD),Scanning Electron Microscope(SEM),B.E.T method,B.J.H method,Differential Thermal Analysis-Thermo-Gravimetric Analysis(DTA-TG)and other assays.The results showed that the synthesized hydrotalcite-like structure with lamellar crystals was the typical Langmuir typeⅣmesoporous structure with a specific surface area of 26.14 m^(2)·g^(-1);it had strong adsorption to phosphate ions,and the adsorption process to phosphate ions was in accordance with the quasi-secondary kinetic model,belonging to the multi-molecular layer adsorption and a spontaneous process of heat absorption.The measurement indicated that when it was added at 20 mg,the adsorption rate of the sample HTlc-2 was 90.16%in 25 mL solution of 3000 mg·L^(-1) phosphate ions and the adsorption amount reached 2626.91 mg·g^(-1).

关 键 词：高炉渣基类水滑石 共沉淀法 片层状结构 磷酸根 吸附性能 

分 类 号：O61[理学—无机化学]