金属有机骨架ZIF-67对刚果红的吸附性研究  

Study of Absorption of Congo Red on Metal-Organic Framework ZIF-67

作　　者：张湛杭 张景丽[1,2] 刘建明 ZHANG Zhanhang ZHANG Jingli LIU Jianming(Tianjin Key Laboratory of Aquatic Science and Engineering School of Environmental and Municipal Engineering, TCU, Tianjin 300384, China)

机构地区：[1]天津城建大学天津市水质科学与技术重点实验室,天津300384 [2]天津城建大学环境与市政工程学院,天津300384

出　　处：《天津城建大学学报》2017年第4期267-272,共6页Journal of Tianjin Chengjian University

摘　　要：将沸石咪唑基金属有机骨架ZIF-67作为吸附剂,吸附去除水溶液中的偶氮染料刚果红.采用傅里叶变换红外光谱(FTIR)、Zeta电位对ZIF-67和ZIF-67负载的染料进行了表征.实验表明,ZIF-67对于刚果红染料的最大吸附容量约为3 900 mg/g;伪二级动力学模型和Langmuir等温模型更好地拟合了实验数据.对实验数据的分析揭示了静电引力是ZIF-67结合染料分子的主要驱动力.Zeolitic imidazole frameworks（ZIFs）,a new type of absorbent,is proposed to absorb Congo Red（CR）. Characterization of the ZIF-67 and ZIF-67-dye systems is performed by using Fourier transform infrared spectroscopy（FTIR） and zeta potential. The results show that the absorption capacity of ZIF-67 for CR can reach up to 3 900 mg/g,the pseudo-secondorder kinetic equation and Langmuir model fits the experimental data well. Thermodynamic parameters reveal that the absorption of Congo Red on the ZIF-67 is spontaneous and exothermic. The analysis of the experimental data indicates that the electrostatic attraction is the main driving force responsible for the dye-ZIF-67 interaction.

关 键 词：ZIF-67 刚果红 吸附机制 参数 

分 类 号：X703[环境科学与工程—环境工程]