Efficient separation of vitamins mixture in aqueous solution using a stable zirconium-based metal-organic framework.

Author(s) Zhao, X.; Zhao, Y.; Zheng, M.; Liu, S.; Xue, W.; Du, G.; Wang, T.; Gao, X.; Wang, K.; Hu, J.; Gao, Z.; Huang, H.
Journal J Colloid Interface Sci
Date Published 2019 Aug 07

High-efficiency separation of niacin (NIA) and nicotinamide (NIC) still faces large challenge up to date. In this work, a stable zirconium-based metal-organic framework (DUT-67) was used to adsorb and separate NIA and NIC in aqueous solutions. The adsorption capacities for NIA and NIC at the concentration ratio of 1:1 were 110.2 mg g and 11.2 mg g, respectively. Further study indicates that low ratio of NIA/ NIC is in favor of the separation. High temperature can restrain the adsorptions of NIA and NIC but promote the separation. Besides, DUT-67 can be well regenerated via a simple method. Mechanism analysis indicates that electrostatic interaction plays a critical role in the separation of these vitamins.

DOI 10.1016/j.jcis.2019.08.024
ISSN 1095-7103
Citation J Colloid Interface Sci. 2019;555:714721.

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