NO_3-N在仿生态焙烧水滑石上的吸附性能  

Adsorption Characteristics of NO_3-N on Bionic Calcinated Hydrotalcite

作　　者：刘芳芳 张聪 张田英 吴旭 程爱华[1] LIU Fang-fang;ZHANG Cong;ZHANG Tian-ying;WU Xu;CHENG Ai-hua(School of Geology and Environment,Xi an University of Science and Technology,Shaanxi Xi an 710054,China)

机构地区：[1]西安科技大学地质与环境学院,陕西西安710054

出　　处：《广州化工》2018年第13期35-37,40,共4页GuangZhou Chemical Industry

基　　金：大学生创新创业训练项目(201710704090)

摘　　要：采用仿生合成法,以枣为模板合成仿生态水滑石,于500℃条件下焙烧制成仿生态焙烧态水滑石(LDO),研究仿生态LDO吸附NO_3-N的影响因素。结果表明:在p H为9、吸附剂量为0.1 g、浓度为50 mg/L的NO_3-N溶液中,仿生态LDO吸附NO_3-N效果最佳,吸附量可达30.25 mg/g。仿生态LDO吸附NO_3-N的规律符合Freundlich吸附等温方程;吸附动力学过程符合准二级动力学方程;吸附热力学参数说明仿生态LDO吸附NO_3-N是一个自发的吸热过程。The bionic hydrotalcite was prepared by biomimetic synthesis,and then was calcinated at 500℃to make hydrotalcite(LDO).Using preparation of nitrate solution,the adsorption properties and influences of factors of nitrate adsorbed by the bionic LDO were studied.The results showed that when pH was 9 and sorbent was 0.1 g,the adsorbing capacity was 30.25 mg/g in concentration of 50 mg/L NO3-N solution.The bionic LDO adsorption of NO3-N was in accord with Freundlich adsorption isotherm equation.Adsorption kinetics conformed to the pseudo-second-order kinetics equation.The thermodynamic parameters of adsorption indicated that the adsorption of NO3-N on the bionic LDO was a spontaneous endothermic process.

关 键 词：仿生合成法 焙烧水滑石 NO3-N 吸附等温线 动力学 热力学 

分 类 号：X703[环境科学与工程—环境工程]