降级(电信)
戒毒(替代医学)
菱铁矿
纳米技术
化学
环境化学
材料科学
废物管理
化学工程
工程类
有机化学
碳酸盐
医学
电信
替代医学
病理
作者
Yu−Hang Xu,Haibo Long,Hsin-Yuan Fang,Lu–Ying Wei,Feng–Ying Cai,Christopher Rensing,Zhong Yuan Zhou,Jian Lü
标识
DOI:10.1016/j.seppur.2024.127912
摘要
The substantial presence of antibiotics in aquatic environments remains as a critical environmental issue that needs to be urgently addressed. In this study, mimetics of C–Dots/siderite heteroaggregates (CSI) were studied in a visible − light − responsive Fenton system as a platform for the degradation of antibiotics in contaminated water. By virtue of the excellent electron transfer of C–Dots, the sustained conversion cycles of Fe(II) → Fe(III) → Fe(II) in CSI were greatly accelerated, and meanwhile the H2O2 utilization was enhanced. The optimized CSI − 3 nanocomposite displayed a prominent degradation efficiency towards a series of tetracycline analogs at ppb levels. Density functional theory (DFT) calculations indicated the excellent photo − Fenton catalytic performance of CSI originated from the increased d − band center and electron density, which considerably improves the utilization of H2O2. Both experimental and theoretical studies revealed that the correlated toxicity of degradation intermediates was significantly decreased. Additionally, a continuous flow device integrating the CSI photo − Fenton system maintained a high degradation efficiency after long − term treatment of simulated chlortetracycline wastewater. The presented work thereby confirms a spontaneous remediation process for the decontamination and detoxification of persistent organic pollutants under the action of heteroaggregates formed by engineered nanoparticles and natural minerals.
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