Ti-based MOF derived by functionalization for selective removal of Pb(II) and Hg(II) from aqueous media

作者：Zeng, Biao; Lin, Guo^*; Li, Jing; Wang, Wei; Li, Yuting; Ding, Zhao^*

来源：MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 2023, 290: 116337.

DOI：10.1016/j.mseb.2023.116337

• Adsorption
• Hg(II)
• Pb(II)
• Ti-MOF
• Selectivity

Herein, Ti-MOF-SH was sucessfully synthesized by a simple one-step method. The kinetics, capacities, selectivities, repeatabilities and mechanisms of Hg2+ and Pb2+ absorption and removal by Ti-MOF-SH have been investiged. Batch experiments show that the maximum adsorption capacity of Ti-MOF-SH for Hg2+ and Pb2+ is 943 and 341 mg/g (298 K), respectively, under the optimum pH (5.0). The adsorption process is endothermic, which conforms to the pseudo-second-order kinetic model and Langmuir model, and mainly depends on electrostatic interaction and the chelation of functional groups containing S and O with metal ions. In addition, TiMOF-SH has excellent selectivity and repeatability for Hg2+ and Pb2+, which is expected to be widely used in the future. The above conclusion indicate that Ti-MOF-SH has excellent comprehensive performance for Hg/Pb removal and is expected to be widely applied in industrial engineering.

• 单位
  重庆大学