摘要
通过溶剂热法合成了一系列新型铁掺杂UIO-66纳米材料(xFe-UIO-66),并进行X射线衍射(XRD)、扫描电镜(SEM)、红外光谱(FT-IR)、N_(2)吸附脱附等温线等表征及用于水中盐酸四环素(TCH)吸附。通过静态吸附实验,考察了Fe掺杂量、pH、反应温度、吸附剂添加量等对吸附性能的影响,结果表明:当Fe∶Zr=0.8∶1(摩尔比)时(0.8Fe-UIO-66),在TCH初始浓度为20mg/L,温度298K,吸附剂投加量为0.3g/L条件下,0.8Fe-UIO-66对TCH的吸附性能最好、去除率可达到99.64%,最大吸附量为227.45mg/g。此外,共存离子实验中发现,在含有Cl^(-)、NO_(3)^(-)、SO_(4)^(2-)、CO_(3)^(2-)的水体中,0.8Fe-UIO-66仍具有较强的吸附TCH能力,吸附机理涵盖有离子间静电作用、芳香环间π-π相互作用,吸附过程符合准二级动力学和Freundlich模型,5次循环实验后依然保持80%吸附性能。
A series of novel Fe-doped UIO-66(xFe-UIO-66)nanoparticles were synthesized by solvothermal method,and were characterized by XRD,SEM,FT-IR,N_(2)-adsorption/desorption isotherms.The xFe-UIO-66 nanoparticles were utilized for the adsorption of tetracycline hydrochloride(TCH)in water.The effects of Fe doping amount,pH value,reaction temperature and adsorbent dosage on the adsorption performance were investigated by static adsorption experiments.The results revealed that when Fe∶Zr=0.8∶1(molar ratio)(0.8Fe-UIO-66),the initial TCH concentration was 20mg/L,temperature was 298K,and adsorbent dosage was 0.3g/L,0.8Fe-UIO-66 exhibited the best adsorption performance for TCH,and the removal rate and the maximum adsorption capacity of 0.8Fe-UIO-66 for TCH could reach 99.64%and 227.45mg/g.Furthermore,the coexisting ion experiments exhibited that 0.8Fe-UIO-66 displayed excellent adsorption ability in the presence of Cl^(-),NO_(3)^(-),SO_(4)^(2-) and CO_(3)^(2-).The main adsorption mechanism included electrostatic interaction,π-πinteraction between aromatic rings.The adsorption process conformed to the pseudo-second-order kinetic model and Freundlich model.After five cycles of experiments,the adsorption performance still maintained 80%.
作者
杜衡威
宋翔
陈星
靳朋岳
陈文清
Du Hengwei;Song Xiang;Chen Xing;Jin Pengyue;Chen Wenqing(College of Architecture and Environment,Sichuan University,Chengdu 610065)
出处
《化工新型材料》
CAS
CSCD
北大核心
2023年第10期197-202,208,共7页
New Chemical Materials
