Department of Chemical Engineering, Curtin University, GPO Box U1987, Perth, WA 6845, Australia.
School of Engineering, Edith Cowan University, 270 Joondalup Drive, Joondalup, Perth, WA 6027, Australia.
J Colloid Interface Sci. 2017 Aug 15;500:88-95. doi: 10.1016/j.jcis.2017.04.001. Epub 2017 Apr 4.
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 417mg/g on UiO-66. The kinetic adsorption of SCP on UiO-66 reached equilibrium just in 10min and the kinetics fits accurately with a pseudo 2nd order model. A plausible mechanism was proposed based on pH effect, pK 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.
首次研究了几种金属有机骨架材料 UiO-66 和 ZIF-67 对水中有毒磺胺类抗生素磺胺氯哒嗪（SCP）的吸附去除。UiO-66 的吸附容量远高于 ZIF-67，具有快速动力学和易于再生的特点，可作为废水处理过程中的一种有前途的吸附剂。批量吸附实验表明，UiO-66 对 SCP 的吸附容量为 417mg/g。SCP 在 UiO-66 上的动力学吸附在 10min 内达到平衡，动力学准确符合拟二级模型。根据 pH 效应、吸附物的 pK 值和 UiO-66 的 Zeta 电位提出了一种合理的机制。高吸附主要归因于疏水性和π-π相互作用以及静电相互作用。热力学研究表明，吸附是自发的、放热的过程。易于再生和高吸附容量证实了 UiO-66 在废水处理过程中的结构稳定性，使其适用于大规模应用。
