2-羰基丙酸-2-吡啶酰腙功能化MCM-41吸附镍离子性能  

Adsorption Properties of 2-carbonylpropionic Acid-2-pyridyl Hydrazone Functionalized MCM-41 towards Nickel Ions

作　　者：陈凤英 李海英 段玉荣 闫宇 王鑫 CHEN Feng-ying;LI Hai-ying;DUAN Yu-rong;YAN Yu;WANG Xin(College of Chemical Engineering and Modern Materials,Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo 726000,Shaanxi,China)

机构地区：[1]商洛学院化学工程与现代材料学院,陕西省尾矿资源综合利用重点实验室,陕西商洛726000

出　　处：《合成材料老化与应用》2021年第5期59-62,共4页Synthetic Materials Aging and Application

基　　金：陕西省教育厅重点项目(19JS023);陕西省大学生创新创业训练计划项目(S201911396011,S202011396071)资助。

摘　　要：在碱性条件下,十六烷基三甲基溴化铵(CTAB)为模板剂,以钒尾矿为硅源,采用水热合成法制备出MCM-41分子筛。通过物理浸渍法对MCM-41分子筛进行表面酰腙功能化,制备出2-羰基丙酸-2-吡啶酰腙(H_(2)L)功能化MCM-41孔分子筛(H_(2)L/MCM-41)。研究H_(2)L/MCM-41对尾矿废水中镍离子的吸附性能,考察了吸附时间、初始浓度、吸附剂用量、温度等因素对其吸附性能的影响。结果表明,H_(2)L/MCM-41在吸附时间为80min,浓度70mg/L,温度60℃,吸附剂用量为0.04g的条件下吸附性能最佳。同时对H_(2)L/MCM-41的吸附过程进行了吸附热力学分析,发现H_(2)L/MCM-41对镍离子的吸附更符合Langmuir吸附模型,化学吸附占主导地位。MCM-41 molecular sieves were synthesized by hydrothermal method with vanadium tailings as silicon source and cetyltrimethyl bromide(CTAB) as template under alkaline conditions.2-carbonylpropionic acid-2-pyridyl hydrazone(H_(2)L)functionalized MCM-41(H_(2)L/MCM-41) molecular sieves were prepared by physical impregnation method.The absorption properties of H_(2)L/MCM-4 1 towards nickel ions were studied.The effects of adsorption time,initial concentration,adsorbent dosage and temperature on the adsorption performance of H_(2)L/MCM-41 were investigated.The results showed that the optimum conditions were:adsorption time of 80 min,the concentration of 70 mg/L,temperature of 60℃,adsorbent dosage of 0.04 g.Thermodynamic analysis of H_(2)L/MCM-41 adsorption process showed that the adsorption of nickel ion by H_(2)L/MCM-41 was more in line with Langmuir adsorption model,and chemical adsorption was dominant.

关 键 词：MCM-41分子筛 2-羰基丙酸-2-吡啶酰腙 吸附性能 镍离子 

分 类 号：TQ424[化学工程]