Efficient degradation of perfluorooctanoic acid by electrospun lignin-based bimetallic MOFs nanofibers composite membranes with peroxymonosulfate under solar light irradiation

IF 7.7 1区化学 Q1 BIOCHEMISTRY & MOLECULAR BIOLOGY

International Journal of Biological Macromolecules Pub Date : 2021-03-31 DOI:10.1016/j.ijbiomac.2021.01.184

Chen Hou , Wenqiang Chen , Linhui Fu , Sufeng Zhang , Chen Liang , Yang Wang

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引用次数: 23

Abstract

Perfluorooctanoic acid (PFOA) has demonstrated potential toxicity to human health and has been detected in different environmental matrices due to its stable physical and chemical properties. To degrade PFOA under solar light irradiation, we fabricated a lignin/polyvinyl alcohol (PVA)/Co/Fe metal-organic frameworks (lignin/PVA/bi-MOFs) composite membrane via a typical electrospinning and in-situ solvothermal method for the catalytic degradation of PFOA. In the peroxymonosulfate (PMS)/membranes/solar light system, Electron paramagnetic resonance analysis (EPR) demonstrated the sulfate radicals (SO₄⁻) and hydroxyl radicals (OH) were generated by activating PMS with transition metal and solar light irradiation. Lignin/PVA/bi-MOFs showed outstanding performance in that 89.6% of PFOA was degraded within 3 h under optimal conditions. Compared with that in solar light, only 59.6% PFOA was degraded in the dark, and the rate constant of PFOA degradation decreased from 0.0150 min⁻¹ to 0.0046 min⁻¹. Moreover, lignin/PVA/bi-MOFs were reused after simply rinsing with ultra-pure water and the degradation capacity of lignin/PVA/bi-MOFs remained at 77% after 4 cycles. The results might provide a new concept for the design of bimetallic MOFs for applications in organic pollutant removal.

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太阳光照射下木质素基双金属mof纳米纤维复合膜对全氟辛酸的高效降解

全氟辛酸(PFOA)已证明对人体健康具有潜在毒性，由于其稳定的物理和化学性质，已在不同的环境基质中检测到。为了在太阳光照射下降解PFOA，我们采用典型的静电纺丝和原位溶剂热法制备了木质素/聚乙烯醇(PVA)/Co/Fe金属-有机骨架(木质素/PVA/bi-MOFs)复合膜，用于催化降解PFOA。电子顺磁共振分析(EPR)表明，过渡金属和太阳光照激活过氧单硫酸根(PMS)，可产生硫酸根自由基(SO4−)和羟基自由基(OH)。在最佳条件下，木质素/PVA/bi- mof在3 h内降解PFOA达89.6%。与日光下相比，黑暗条件下PFOA的降解率仅为59.6%，降解速率常数从0.0150 min−1降至0.0046 min−1。此外，木质素/PVA/bi- mof经超纯水简单漂洗后可重复使用，4次循环后木质素/PVA/bi- mof的降解率仍保持在77%。研究结果可为双金属mof在有机污染物去除中的应用提供新的设计思路。

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来源期刊

International Journal of Biological Macromolecules 生物-生化与分子生物学

CiteScore

13.70

自引率

9.80%

发文量

2728

审稿时长

64 days

期刊介绍： The International Journal of Biological Macromolecules is a well-established international journal dedicated to research on the chemical and biological aspects of natural macromolecules. Focusing on proteins, macromolecular carbohydrates, glycoproteins, proteoglycans, lignins, biological poly-acids, and nucleic acids, the journal presents the latest findings in molecular structure, properties, biological activities, interactions, modifications, and functional properties. Papers must offer new and novel insights, encompassing related model systems, structural conformational studies, theoretical developments, and analytical techniques. Each paper is required to primarily focus on at least one named biological macromolecule, reflected in the title, abstract, and text.