Activated carbon fiber loaded nano zero-valent iron for Microcystis aeruginosa removal: Performance and mechanisms

IF 11.3 1区化学 Q1 CHEMISTRY, PHYSICAL ACS Catalysis Pub Date : 2024-09-25 DOI:10.1016/j.biortech.2024.131538

Guoming Zeng , Dong Liang , Xuanhao Fan , Yu He , Rui Zhang , Xiaoling Lei , Haoxuan Wei , Da Sun

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Abstract

Cyanobacterial blooms caused by Microcystis aeruginosa threaten environmental safety and daily life. In this study, an activated carbon fiber-supported nano zero-valent iron composite (ACF-nZVI) was developed to remove Microcystis aeruginosa. The results showed that nZVI was evenly distributed on the activated carbon fibers, preventing aggregation and oxidation. ACF-nZVI achieved a removal efficiency of more than 90 % within a pH range of 3–7. During the reaction, H₂O₂, which was generated by Fe⁰, was activated to form ·OH and ·O^–₂, which dismantled antioxidant enzymes and induced lipid peroxidation. Additionally, ACF-nZVI destroyed the cell wall and membrane, resulting in protein and humus leakage and causing 92.34 % cell damage and death. In this study, an environmentally friendly and stable nanomaterial was developed, offering a novel approach for the safe, cost-effective, and efficient removal of cyanobacteria.

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用于去除铜绿微囊藻的纳米零价铁活性炭纤维：性能与机理

铜绿微囊藻引起的蓝藻藻华威胁着环境安全和日常生活。本研究开发了一种活性炭纤维支撑的纳米零价铁复合材料（ACF-nZVI），用于去除铜绿微囊藻。结果表明，nZVI 均匀地分布在活性炭纤维上，防止了聚集和氧化。在 pH 值为 3-7 的范围内，ACF-nZVI 的去除率超过 90%。在反应过程中，Fe0 产生的 H2O2 被活化形成-OH 和-O-2，从而破坏了抗氧化酶并诱发脂质过氧化。此外，ACF-nZVI 破坏了细胞壁和细胞膜，导致蛋白质和腐殖质渗漏，造成 92.34 % 的细胞损伤和死亡。本研究开发了一种环境友好且稳定的纳米材料，为安全、经济、高效地去除蓝藻提供了一种新方法。

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来源期刊

ACS Catalysis CHEMISTRY, PHYSICAL-

CiteScore

20.80

自引率

6.20%

发文量

1253

审稿时长

1.5 months

期刊介绍： ACS Catalysis is an esteemed journal that publishes original research in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. It offers broad coverage across diverse areas such as life sciences, organometallics and synthesis, photochemistry and electrochemistry, drug discovery and synthesis, materials science, environmental protection, polymer discovery and synthesis, and energy and fuels. The scope of the journal is to showcase innovative work in various aspects of catalysis. This includes new reactions and novel synthetic approaches utilizing known catalysts, the discovery or modification of new catalysts, elucidation of catalytic mechanisms through cutting-edge investigations, practical enhancements of existing processes, as well as conceptual advances in the field. Contributions to ACS Catalysis can encompass both experimental and theoretical research focused on catalytic molecules, macromolecules, and materials that exhibit catalytic turnover.