Cu Al-LDHs/生物质炭的制备及对水中磷的去除  

Preparation of CuAl-LDHs/BC and adsorption of phosphate from aqueous solution

作　　者：彭小明[1] 罗文栋 胡锋平[1] 祝泽兵[1] 王敏[1] 李阳 PENG Xiao-ming;LUO Wen-dong;HU Feng-ping;ZHU Ze-bing;WANG Min;LI Yang(School of Civil Engineering and Architecture,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学土木建筑学院,江西南昌330013

出　　处：《应用化工》2019年第2期304-308,共5页Applied Chemical Industry

基　　金：国家自然科学基金青年科学基金资助项目(51608198);江西省自然科学基金资助项目(20171BBH80008;20171BAB206047);国家博士后基金项目(2017M621655)

摘　　要：采用水热法制备铜铝层状双金属氢氧化物,负载在剑麻生物质炭上,得到CuAl-LDHs/生物质炭,通过SEM、BET、XRD和FTIR等对结构进行表征,考察了初始pH值、投加量、吸附时间和温度等对吸附除磷的影响,并讨论了吸附动力学与等温吸附特性。结果表明,制备的材料结晶度高、粒径小,平均孔径为4.37 nm;吸附动力学和吸附等温线分别符合准二级动力学方程和Langmuir吸附等温方程。在pH为8.0,温度25℃时,对磷的最大吸附容量可达78.56 mg/g。Cu/Al layered double hydroxides was prepared by hydrothermal method and successfully loaded on sisal biochar,which was labeled as CuAl-LDHs/BC.The effects of initial pH value,dosage,adsorption time and temperature on phosphate removal by adsorption were investigated.The structure of the adsorbent was characterized by SEM,BET,XRD and FTIR,and the adsorption kinetic and equilibrium data were analyzed.The results showed that the synthesized material had high crystallinity,small particle size and average pore size was 4.37 nm.The phosphate adsorption behavior by could be described by Langmuir isotherm and the second-order kinetics.The maximum adsorption capacity of phosphate reached 78.56 mg/g under the condition of pH value was 8.0 at 25℃.

关 键 词：层状双金属氢氧化物 生物质炭 吸附除磷 动力学 等温方程 

分 类 号：TQ028[化学工程] X712[环境科学与工程—环境工程]