乙二胺改性ZIF-8的制备及其水体中As(Ⅲ)和As(Ⅴ)的吸附研究  

Preparation of ethylenediamine modified ZIF-8 and the adsorption for As(Ⅲ) and As(Ⅴ) in water

作　　者：李丹[1] 江晖[1] 廖天宇 李广鹏[1] 耿文华[1] 

机构地区：[1]南京工业大学生物与制药工程学院,南京211816

出　　处：《化工新型材料》2017年第5期130-133,共4页New Chemical Materials

基　　金：国家科技支撑计划项目(2011BAD15B02);863计划(2012AA021405)

摘　　要：用液相扩散法合成沸石咪唑酯骨架类材料ZIF-8,并向液相中加入不同含量的乙二胺(1、2和3mL)改性,运用X射线衍射仪、扫描电镜、比表面积及孔容吸附测定仪、傅里叶红外光谱仪等进行表征。结果表明:乙二胺的加入在一定程度上改变了ZIF-8的晶体形貌,增加了材料的比表面积。实验对改性ZIF-8吸附水体中砷的实验影响条件如反应浓度、反应时间和酸碱度进行研究探讨。结果表明:在改性ZIF-8使用量为0.04g/L、pH=7、初始砷浓度2.0mg/L和反应2h的条件下,改性ZIF-8对As(Ⅲ)和As(Ⅴ)吸附量分别达到19.87和49.92mg/g。ZIF-8 was prepared by liquid phase diffusion method,with different contents of ethylenediamine（1,2 and 3mL）as the modifier agent. The resultant products were characterized by XRD,SEM,BET and FT-IR. The results showed that the morphology of ZIF 8 could be changed with the addition of ethylenediamine,and the corresponding specific surface area was also increased. The modified ZIF 8 was applied for the removal of arsenic（ gI and V ） in water,and the effects of adsorption time,concentration of arsenic（ Ⅲ and Ⅴ ）,and the solution pH were investigated. The results showed that the adsorption capacity of modified ZIF-8 to As（ Ⅲ ）and As（ Ⅴ ）could reach 19.87 and 49.92mg/g,respectively,according to the condition which the dosage was 0.04g/L, pH = 7, the initial concentration of arsenic（ Ⅲ and Ⅴ ） was 2.0mg/L, and the adsorption time was 2h.

关 键 词：ZIF-8 乙二胺 改性 砷 

分 类 号：O647.3[理学—物理化学]