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基于锌的金属有机骨架作为受污染水中氧氟沙星的吸附剂：ZIF-8 与 Zn(BTC)。

Zinc Based Metal-Organic Frameworks as Ofloxacin Adsorbents in Polluted Waters: ZIF-8 vs. Zn(BTC).

机构信息

C.S.G.I. (Consorzio Interuniversitario per lo Sviluppo dei Sistemi a Grande Interfase) & Department of Chemistry, Physical Chemistry Section, University of Pavia, 27100 Pavia, Italy.

Department of Chemistry, University of Pavia, 27100 Pavia, Italy.

出版信息

Int J Environ Res Public Health. 2021 Feb 3;18(4):1433. doi: 10.3390/ijerph18041433.

DOI:10.3390/ijerph18041433
PMID:33546512
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7913664/
Abstract

Two different zinc-based metal-organic frameworks (MOFs) were investigated to remove one of the most used fluoroquinolone antibiotic, Ofloxacin (OFL), from polluted water. The most common zeolitic imidazolate framework-8 (ZIF-8) and the green Zn(II) and benzene-1,3,5-tri-carboxylate (Zn(BTC)) were prepared through a facile synthetic route and characterized by means of Fourier-Transform Infrared (FT-IR) Spectroscopy, X-ray Powder Diffraction (XRPD), and Scanning Electron Microscopy (SEM) analyses. The two MOFs were compared in terms of both adsorption and kinetic aspects under real conditions (tap water, natural pH). Results showed that OFL was adsorbed in remarkable amounts, 95 ± 10 and 25.3 ± 0.8 mg g on ZIF-8 and Zn(BTC), respectively, following different mechanisms. Specifically, a Langmuir model well described the ZIF-8 profile, while for Zn(BTC), cooperative adsorption occurred. Moreover the kinetic results were quite different, pseudo-second-order and sigmoidal, respectively. The suitability of ZIF-8 and Zn(BTC) as adsorbent phases for water depollution was tested on tap water samples spiked with OFL 10 µg L. The obtained removal efficiencies, of 88% for ZIF-8 and 72% for Zn(BTC), make these materials promising candidates for removing fluoroquinolone antibiotics (FQs) from polluted waters, notwithstanding their limited reusability in tap water, as demonstrated by in-depth characterization of the two MOFs after usage.

摘要

两种不同的基于锌的金属有机骨架（MOFs）被用于从受污染的水中去除最常用的氟喹诺酮类抗生素之一——氧氟沙星（OFL）。最常见的沸石咪唑酯骨架-8（ZIF-8）和绿色的 Zn(II)和苯-1,3,5-三甲酸（Zn(BTC)) 通过简便的合成路线制备，并通过傅里叶变换红外（FT-IR）光谱、X 射线粉末衍射（XRPD）和扫描电子显微镜（SEM）分析进行了表征。在实际条件（自来水，自然 pH）下，从吸附和动力学方面对两种 MOFs 进行了比较。结果表明，OFL 的吸附量非常大，ZIF-8 和 Zn(BTC) 的吸附量分别为 95±10 和 25.3±0.8 mg g-1，遵循不同的机制。具体来说，Langmuir 模型很好地描述了 ZIF-8 的形态，而对于 Zn(BTC)，则发生了协同吸附。此外，动力学结果也有很大的不同，分别为拟二级和类双曲线。ZIF-8 和 Zn(BTC) 作为吸附剂相用于自来水样品中 OFL 10 µg L 的去除效率分别为 88%和 72%，这使得这些材料成为从受污染的水中去除氟喹诺酮类抗生素（FQs）的有前途的候选物，尽管它们在自来水中的可重复使用性有限，这可以通过对两种 MOFs 使用后的深入表征来证明。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/97d76274d625/ijerph-18-01433-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/effd3676ab81/ijerph-18-01433-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/6ce1e9fd7fd5/ijerph-18-01433-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/9e46a9141160/ijerph-18-01433-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/ad3ef4741755/ijerph-18-01433-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/c4c7c5f60d24/ijerph-18-01433-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/2eafd74cceaf/ijerph-18-01433-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/5811927cb10d/ijerph-18-01433-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/14f0266a04ea/ijerph-18-01433-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/4c846493dede/ijerph-18-01433-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/3c7b256f8378/ijerph-18-01433-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/97d76274d625/ijerph-18-01433-g011.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/effd3676ab81/ijerph-18-01433-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/6ce1e9fd7fd5/ijerph-18-01433-g002a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/9e46a9141160/ijerph-18-01433-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/ad3ef4741755/ijerph-18-01433-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/c4c7c5f60d24/ijerph-18-01433-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/2eafd74cceaf/ijerph-18-01433-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/5811927cb10d/ijerph-18-01433-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/14f0266a04ea/ijerph-18-01433-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/4c846493dede/ijerph-18-01433-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/3c7b256f8378/ijerph-18-01433-g010.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cf94/7913664/97d76274d625/ijerph-18-01433-g011.jpg

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