摘要
锆基金属有机骨架UiO‑66是一种具有高吸附效率的吸附剂,为提高其吸附性能,采用溶剂热法在UiO‑66中引入铈(Ce)和锰(Mn)两种金属离子制备改性材料CMN‑UiO,研究了改性材料的性能和对四环素的吸附特性。合成的CMN‑UiO具有良好的循环再生性能,其比表面积为1056.43 m^(2)/g,平均孔径为1.35 nm。CMN‑UiO较未改性的UiO‑66对四环素具有更高的吸附效率,最大吸附容量为234.13 mg/g,吸附平衡时间为40 min,吸附过程遵循Langmuir模型和伪二级动力学模型。当pH=9.0时,CMN‑UiO对四环素的吸附容量最大。CMN‑UiO对四环素的主要吸附机理为静电相互作用、氢键合力、酸碱作用和π-π相互作用。
Zirconium‑based organic framework UiO‑66 is an adsorbent with high efficiency.To further improve its adsorption performance,two metal ions cerium(Ce)and manganese(Mn)were doped into UiO‑66 by solvothermal method to prepare the modified material CMN‑UiO.The performance and tetracycline adsorption characteristics of the modified material were investigated.The synthesized CMN‑UiO had good recycling performance.The specific surface area was 1056.43 m^(2)/g,and the average pore size was 1.35 nm.Compared with unmodified UiO‑66,CMN‑UiO exhibited higher tetracycline adsorption efficiency.The maximum adsorption capacity was 234.13 mg/g,the adsorption reached equilibrium in 40 min,and the adsorption process followed the Langmuir model and pseudo‑second‑order kinetic model.When the pH was 9.0,CMN‑UiO had the maximum tetracycline adsorption capacity.The adsorption mechanisms mainly consisted of electrostatic interaction,hydrogen bonding,acid‑base interaction andπ-πinteraction.
作者
阳春
陈晓虹
王瀚
成玉
胡碧波
YANG Chun;CHEN Xiao‑hong;WANG Han;CHENG Yu;HU Bi‑bo(Key Laboratory of the Three Gorges Reservoir Region’s Eco‑Environment<Ministry of Education>,Chongqing University,Chongqing 400045,China)
出处
《中国给水排水》
CAS
CSCD
北大核心
2023年第21期78-85,共8页
China Water & Wastewater
