一种设计 ZIF-67/Fe3O4 核壳纳米复合材料的简便策略：从废水中去除环丙沙星的新见解,Process Safety and Environmental Protection

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一种设计 ZIF-67/Fe3O4 核壳纳米复合材料的简便策略：从废水中去除环丙沙星的新见解
Process Safety and Environmental Protection ( IF 6.9 ) Pub Date : 2021-03-01 , DOI: 10.1016/j.psep.2020.09.061
Hassan Alamgholiloo , Bayram Hashemzadeh , Nader Noroozi Pesyan , Amir Sheikhmohammadi , Esrafil Asgari , Jaber Yeganeh , Hassan Hashemzadeh

摘要利用高级氧化工艺 (AOP) 将抗生素降解为低毒性副产物以提高饮用水和废水的质量仍然是环境目标的巨大挑战。在这项研究中，使用简单的溶胶-凝胶法制备了基于钴沸石咪唑酯骨架 (ZIF-67) 和 Fe3O4 纳米粒子 (NPs) 的纳米复合材料。在这种纳米复合材料中，Fe3O4 NPs 被用作微孔 ZIF-67 生长的理想平台，旨在创造一种具有磁分离功能的高效多相催化剂，用于活化过硫酸盐 (PMS) 以快速降解环丙沙星 (CIP) 抗生素。所提出的纳米复合材料的催化活性通过几个操作因素进行系统评估，例如纳米催化剂和氧化剂剂量、初始 pH 值、共存的阴离子，以及催化剂的稳定性。此外，清除技术和电子自旋共振 (ESR) 表明硫酸盐和羟基自由基在降解过程中起主要作用。研究结果表明，ZIF-67/Fe3O4 纳米复合材料是一种更环保、更适合大规模应用的选择，并为从生态系统中去除污染物提供了新的见解。

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A facile strategy for designing core-shell nanocomposite of ZIF-67/Fe3O4: A novel insight into ciprofloxacin removal from wastewater

Abstract Utilization of the advanced oxidation process (AOP) for degradation of antibiotics into byproducts with low toxicity for enhancing the quality of drinking water and wastewater has remained a huge challenge for environmental aim. In this study, a nanocomposite based on Cobalt zeolite imidazolate framework (ZIF-67), and Fe3O4 nanoparticles (NPs) were prepared using the simple sol-gel method. In this nanocomposite, Fe3O4 NPs were used as an ideal platform for microporous ZIF-67 growth, aiming to create an efficient heterogeneous catalyst with magnetic separation for the activation of peroxymonosulfate (PMS) to expeditiously degrade ciprofloxacin (CIP) antibiotics. The catalytic activity of the proposed nanocomposite was systematically evaluated with several operational factors, such as nanocatalyst and oxidant dosage, initial pH, co-existing anions, and the stability of the catalyst. Furthermore, scavenging technique and electron spin resonance (ESR) demonstrate that the sulfate and hydroxyl radicals play a major role in the degradation process. The findings indicate that ZIF-67/Fe3O4 nanocomposite is a greener and more suitable option for large scale applications and creates new insights into the removal of contaminants from the ecosystem.

更新日期：2021-03-01

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