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- Title
Adsorption of Ni2+ and Cu2+ from Aqueous Solution by Polyethylenimine Impregnation of Metal–Organic Frameworks.
- Authors
Wang, Dan; Xiao, Xinfeng; Han, Bo; Ni, Weiming; Gao, Yu; Li, Lin; Xue, Jianliang
- Abstract
A series of UiO-66-PEI materials were obtained by impregnating UiO-66 with different amounts of polyethylenimine (PEI) with UiO-66 as the basic skeleton material. The materials were used as adsorbents to remove Ni 2 + and Cu 2 + from water. The prepared UiO-66-PEI-30 had good adsorption capacity on Ni 2 + and Cu 2 + at 30% PEI. The adsorption of Ni 2 + and Cu 2 + with UiO-66-PEI-30 was further studied. The role of eluent types, elution time, concentration and volume on the effect of Cu 2 + elution was investigated. The adsorption of Ni 2 + and Cu 2 + by UiO-66-PEI-30 followed the pseudo-second-order kinetic model and Langmuir adsorption model. The maximum adsorption capacities obtained by Langmuir fitting for Ni 2 + and Cu 2 + were 11.54 mg g − 1 and 24.87 mg g − 1 , respectively. After four desorption/adsorption experiments, UiO-66-PEI-30 still showed good adsorption performance. UiO-66 impregnated with PEI was an adsorbent with adsorption potential. In this work, polyethylenimine impregnated UiO-66 adsorbents were prepared for the adsorption of heavy metals Ni2+ and Cu2+ in water. At the same time, the composite material adsorbed Cu2+ was eluted to explore the regeneration performance of the material.
- Subjects
LANGMUIR isotherms; METAL-organic frameworks; AQUEOUS solutions; ADSORPTION (Chemistry); ADSORPTION capacity; SOLID phase extraction
- Publication
NANO, 2020, Vol 15, Issue 3, pN.PAG
- ISSN
1793-2920
- Publication type
Article
- DOI
10.1142/S1793292020500290