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生物基物质-磁性氧化铁杂化纳米材料存在下咖啡因光降解的新见解

New Insights on the Photodegradation of Caffeine in the Presence of Bio-Based Substances-Magnetic Iron Oxide Hybrid Nanomaterials.

作者信息

Palma Davide, Bianco Prevot Alessandra, Brigante Marcello, Fabbri Debora, Magnacca Giuliana, Richard Claire, Mailhot Gilles, Nisticò Roberto

机构信息

Department of Chemistry, University of Torino, via P. Giuria 7, 10125 Torino, Italy.

CNRS, SIGMA Clermont, Institut de Chimie de Clermont-Ferrand, Université Clermont Auvergne, F-63000 Clermont-Ferrand, France.

出版信息

Materials (Basel). 2018 Jun 26;11(7):1084. doi: 10.3390/ma11071084.

DOI:10.3390/ma11071084
PMID:29949864
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6073507/
Abstract

The exploitation of organic waste as a source of bio-based substances to be used in environmental applications is gaining increasing interest. In the present research, compost-derived bio-based substances (BBS-Cs) were used to prepare hybrid magnetic nanoparticles (HMNPs) to be tested as an auxiliary in advanced oxidation processes. Hybrid magnetic nanoparticles can be indeed recovered at the end of the treatment and re-used in further water purification cycles. The research aimed to give new insights on the photodegradation of caffeine, chosen as marker of anthropogenic pollution in natural waters, and representative of the contaminants of emerging concern (CECs). Hybrid magnetic nanoparticles were synthetized starting from Fe(II) and Fe(III) salts and BBS-C aqueous solution, in alkali medium, via co-precipitation. Hybrid magnetic nanoparticles were characterized via X-ray diffraction (XRD), thermo-gravimetric analysis (TGA) and Fourier transform infrared (FTIR) spectroscopy. The effect of pH, added hydrogen peroxide, and dissolved oxygen on caffeine photodegradation in the presence of HMNPs was assessed. The results allow for the hypothesis that caffeine abatement can be obtained in the presence of HMNPs and hydrogen peroxide through a heterogeneous photo-Fenton mechanism. The role of hydroxyl radicals in the process was assessed examining the effect of a selective hydroxyl radical scavenger on the caffeine degradation kinetic.

摘要

将有机废物作为一种用于环境应用的生物基物质来源加以利用正日益受到关注。在本研究中，采用堆肥衍生的生物基物质（BBS-Cs）制备了杂化磁性纳米颗粒（HMNPs），并将其作为高级氧化过程中的一种助剂进行测试。杂化磁性纳米颗粒确实可以在处理结束时回收，并在进一步的水净化循环中重复使用。本研究旨在对咖啡因的光降解提供新的见解，咖啡因被选为天然水中人为污染的标志物，也是新兴关注污染物（CECs）的代表。杂化磁性纳米颗粒是在碱性介质中，通过共沉淀法，从Fe(II)和Fe(III)盐以及BBS-C水溶液开始合成的。通过X射线衍射（XRD）、热重分析（TGA）和傅里叶变换红外（FTIR）光谱对杂化磁性纳米颗粒进行了表征。评估了pH值、添加的过氧化氢和溶解氧对在HMNPs存在下咖啡因光降解的影响。结果支持了这样一种假设，即通过非均相光芬顿机制，在HMNPs和过氧化氢存在的情况下可以实现咖啡因的去除。通过考察一种选择性羟基自由基清除剂对咖啡因降解动力学的影响，评估了羟基自由基在该过程中的作用。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/a404e9f928e1/materials-11-01084-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/f603fcd0d425/materials-11-01084-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/d10872f92800/materials-11-01084-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/fd1d51e66a79/materials-11-01084-g002.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/4dced843bac0/materials-11-01084-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/648ede280b23/materials-11-01084-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/81287836655b/materials-11-01084-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/b293dc65084e/materials-11-01084-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/a404e9f928e1/materials-11-01084-sch002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/f603fcd0d425/materials-11-01084-sch001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/d10872f92800/materials-11-01084-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/fd1d51e66a79/materials-11-01084-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/a129bc82e74e/materials-11-01084-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/2f366f0c03da/materials-11-01084-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/4dced843bac0/materials-11-01084-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/648ede280b23/materials-11-01084-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/81287836655b/materials-11-01084-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/b293dc65084e/materials-11-01084-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7ca2/6073507/a404e9f928e1/materials-11-01084-sch002.jpg

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