Published December 2021 | Version v1
Journal article Metadata-only

Performance and mechanism for U(VI) adsorption in aqueous solutions with amino-modified UiO-66

Creators

  • 1. University of South China, Hengyang, Hunan (China). Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy
  • 2. University of South China, Hengyang (China). Hunan Provincial Key Laboratory of Pollution Control and Resources Technology

Description

The adsorption performance and mechanism of the amino-modified zirconium-based metal organic framework (UiO-66-NH2) for the removal of U(VI) in aqueous solution were studied. Compared with UiO-66, UiO-66-NH2 shows better adsorption performance due to the introduction of amino groups. The adsorption characteristics of factors such as pH, UiO-66-NH2 dosage and contact time were investigated. The results show that the maximum adsorption capacity is 384.6 mg g-1 at pH = 6 and T = 313 K. The adsorption conforms to the quasi-second-order kinetic model and the Langmuir isotherm model. The thermodynamic parameters indicate that the adsorption process of U(VI) is endothermic and spontaneous. After five cycles, the removal rate of U(VI) still exceeded 83.53%. The results indicate that UiO-66-NH2 is a promising adsorbent that can effectively remove U(VI) in radioactive wastewater. (author)

Additional details

Publishing Information

Journal Title
Journal of Radioanalytical and Nuclear Chemistry
Journal Volume
330
Journal Issue
3
Journal Page Range
p. 857-869
ISSN
0236-5731
CODEN
JRNCDM

INIS

Country of Publication
Hungary
Country of Input or Organization
Hungary
INIS RN
52118445
Subject category
S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
Descriptors DEI
ADSORPTION; AQUEOUS SOLUTIONS; MEMBRANES; URANIUM; ZIRCONIUM
Descriptors DEC
ACTINIDES; DISPERSIONS; ELEMENTS; HOMOGENEOUS MIXTURES; METALS; MIXTURES; SOLUTIONS; SORPTION; TRANSITION ELEMENTS

Optional Information

Notes
57 refs.