磁性水滑石/生物炭复合材料的制备及其对水溶液中磷的吸附性能  

Preparation of magnetic hydrotalcite/biochar composite and its adsorption performance for phosphorus in aqueous solution

作　　者：肖作义[1] 肖宇 肖明慧[2] 郑春丽[1] 郝杰东 樊明哲 王维大[1] XIAO Zuoyi;XIAO Yu;XIAO Minghui;ZHENG Chunli;HAO Jiedong;FAN Mingzhe;WANG Weida(School of Energy and Environment,Inner Mongolia University of Science and Technology,Baotou Inner Mongolia 014010;Baotou City Drainage Industry Co.,Ltd.,Baotou Inner Mongolia 014000)

机构地区：[1]内蒙古科技大学能源与环境学院,内蒙古包头014010 [2]包头市排水产业有限责任公司,内蒙古包头014000

出　　处：《环境污染与防治》2020年第9期1090-1095,1101,共7页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.41561094);内蒙古青年科技英才支持计划项目(No.NJYT 14-B12);内蒙古科技厅应用技术研究项目(No.201501083);内蒙古自治区自然科学基金资助项目(No.2009MS0609)。

摘　　要：以芦苇秸秆生物炭为基体,制备了磁性水滑石/生物炭复合材料(Fe 3O 4-Mg/Al-LDH/BC)。考察不同pH、Fe 3O 4-Mg/Al-LDH/BC投加量、初始磷浓度、吸附时间以及反应温度对Fe 3O 4-Mg/Al-LDH/BC吸附磷的影响。结果表明:Fe 3O 4-Mg/Al-LDH/BC对磷的吸附符合准二级动力学模型和Freundlich模型,吸附过程是自发的吸热反应。在最佳的实验条件下(Fe 3O 4-Mg/Al-LDH/BC投加量为5.0 g/L,磷初始质量浓度为20 mg/L,pH为6.0,温度为30℃,吸附时间为120 min),Fe 3O 4-Mg/Al-LDH/BC对磷的去除率可达99.24%,该材料是一种新型高效的磷吸附材料。Magnetic hydrotalcite/biochar composites(Fe 3O 4-Mg/Al-LDH/BC)were prepared using reed straw biochar as matrix.The effects of different pH,Fe 3O 4-Mg/Al-LDH/BC dosage,initial phosphorus concentration,adsorption time and reaction temperature on the adsorption of phosphorus by Fe 3O 4-Mg/Al-LDH/BC were investigated.The results showed that the adsorption of phosphorus by Fe 3O 4-Mg/Al-LDH/BC conformed to the quasi second order dynamic model and Freundlich model.The adsorption process of phosphorus was a spontaneous endothermic reaction.Under optimal experimental conditions(Fe 3O 4-Mg/Al-LDH/BC dosage was 5.0 g/L,the initial mass concentration of phosphorus was 20 mg/L,pH was 6.0,the temperature was 30℃and adsorption time was 120 min),phosphorus removal rate could reach 99.24%,this material was a new type of high-efficiency phosphorus adsorption material.

关 键 词：Mg/Al 水滑石 FE 3O 4 生物炭 磷溶液 芦苇秸秆 

分 类 号：X703[环境科学与工程—环境工程]