Journal
MICROPOROUS AND MESOPOROUS MATERIALS
Volume 278, Issue -, Pages 175-184Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2018.11.022
Keywords
Metal-Organic frameworks; Zeolitic imidazolate frameworks; Adsorption; Rare earth elements; Hierarchical porous ZIF-8
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Funding
- Swedish Research Council (VR)
- Swedish Governmental Agency for Innovation Systems (VINNOVA)
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Hierarchical porous zeolitic imidazolate frameworks nanoparticles (ZIF-8 NPs) were synthesized at room temperature via a template-free approach under dynamic conditions (stirring) using water as a solvent. The ZIF-8 NPs were evaluated as adsorbents for rare earth elements (La3+, Sm3+ and Dy3+). Adsorption equilibrium was reached after 7h and high adsorption capacities were obtained for dysprosium and samarium (430.4 and 281.1 mg g(-1), respectively) and moderate adsorption capacity for lanthanum (28.8 mg g(-1)) at a pH of 7.0. The high adsorption capacitiese, as well as the high stability of ZIF-8 NPs, make the hierarchical ZIF-8 materials as an efficient adsorbent for the recovery of La3+, Sm3+ and Dy3+ from aqueous solution.
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