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

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Authors
Azhar, M.
Abid, H.
Periasamy, V.
Sun, Hongqi
Tade, Moses
Wang, Shaobin
Date
2017
Type
Journal Article

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Azhar, M. and Abid, H. and Periasamy, V. and Sun, H. and Tade, M. and Wang, S. 2017. Adsorptive removal of antibiotic sulfonamide by UiO-66 and ZIF-67 for wastewater treatment. Journal of Colloid and Interface Science. 500: pp. 88-95.
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Journal of Colloid and Interface Science
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Department of Chemical Engineering
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Abstract

© 2017 Elsevier Inc.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 p-p 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.