Adsorptive removal of antibiotic sulfonamide by UiO-66 and ZIF-67 for wastewater treatment

Abstract

Adsorptive removal of a toxic sulfonamide antibiotic, sulfachloropyradazine (SCP), from aqueous solution was studied on several metal organic frameworks, UiO-66 and ZIF-67, for the first time. UiO-66 exhibited a much higher adsorption capacity than ZIF-67, fast kinetics, and easy regeneration for reuse, demonstrating as a promising adsorbent in wastewater treatment processes. The batch adsorption shows an adsorption capacity of SCP at 417 mg/g on UiO-66. The kinetic adsorption of SCP on UiO-66 reached equilibrium just in 10 min and the kinetics fits accurately with a pseudo 2nd order model. A plausible mechanism was proposed based on pH effect, pKa value of the adsorbate and Zeta potential of UiO-66. The high adsorption is mainly contributed to hydrophobicity and π-π interactions along with electrostatic interactions. Thermodynamic studies show the spontaneous adsorption and exothermic process. The easy regeneration and high adsorption capacity confirms structural stability of the robust UiO-66 in wastewater treatment processes, making it suitable for a large scale application.

RAS ID

24657

Document Type

Journal Article

Date of Publication

2017

School

School of Engineering

Copyright

subscription content

Publisher

Elsevier

Comments

Azhar, M. R., Abid, H. R., Periasamy, V., Sun, H., Tade, M. O., & Wang, S. (2017). Adsorptive removal of antibiotic sulfonamide by UiO-66 and ZIF-67 for wastewater treatment. Journal of Colloid and Interface Science, 500, 88-95. https://doi.org/10.1016/j.jcis.2017.04.001

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Link to publisher version (DOI)

10.1016/j.jcis.2017.04.001