Efficient carbamazepine degradation by modified copper tailings and PMS system: Performance evaluation and mechanism

Journal of Hazardous Materials, Год журнала: 2023, Номер 465, С. 133198 - 133198

Опубликована: Дек. 10, 2023

Язык: Английский

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Copper Nanowire Networks: An Effective Electrochemical Peroxymonosulfate Activator toward Nitrogenous Pollutant Abatement

Environmental Science & Technology, Год журнала: 2023, Номер 57(27), С. 10127 - 10134

Опубликована: Июнь 14, 2023

Herein, we developed an electrochemical filtration system for effective and selective abatement of nitrogenous organic pollutants via peroxymonosulfate (PMS) activation. Highly conductive porous copper nanowire (CuNW) networks were constructed to serve simultaneously as catalyst, electrode, media. In one demonstration the CuNW network's capability, a single pass through filter (τ < 2 s) degraded 94.8% sulfamethoxazole (SMX) at applied potential −0.4 V vs SHE. The exposed {111} crystal plane triggered atomic hydrogen (H*) generation on sites, which contributed PMS reduction. Meanwhile, with involvement SMX, Cu–N bond was formed by interactions between −NH2 group SMX Cu sites CuNW, accompanied redox cycling Cu2+/Cu+, facilitated potential. different charges active made it easier withdraw electrons promote oxidation. Theoretical calculations experimental results combined suggest mechanism pollution networks. showed that efficacy degradation wide array robust across broad range solution pH complex aqueous matrices. flow-through operation outperformed conventional batch electrochemistry due convection-enhanced mass transport. This study provides new strategy environmental remediation integrating state-of-the-art material science, advanced oxidation processes, microfiltration technology.

Язык: Английский

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Ternary Co…Ov…Cu sites trigger Co-utilization of endogenous electron donor-acceptor for sustainable removal of refractory low-carbon fatty amines in Fenton-like system

Applied Catalysis B Environment and Energy, Год журнала: 2023, Номер 340, С. 123184 - 123184

Опубликована: Авг. 18, 2023

Язык: Английский

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Performance enhancement and mechanism of electroenhanced peroxymonosulfate activation by single-atom Fe catalyst modified electrodes

Proceedings of the National Academy of Sciences, Год журнала: 2024, Номер 121(37)

Опубликована: Сен. 5, 2024

Peroxymonosulfate-based electrochemical advanced oxidation processes (PMS-EAOPs) have great potential for sustainable water purification, so an in-depth understanding of its catalytic mechanism is imperative to facilitate practical application. Herein, the performance enhancement and electroenhanced PMS activation by single-atom Fe catalyst modified carbon felt was investigated. Compared with anode, cathode exhibited faster bisphenol A degradation ( k = 0.073 vs. anode 0.015 min −1 ), increased consumption (98.8 10.3%), order magnitude reduction dissolution (0.068 0.787 mg L ). Mass transfer a key factor limiting activation, while electrostriction in hydrophobic region caused electric field (CEF) significantly mass coefficient m, 1.49 × 10 −4 2.68 −5 m s The enhanced synergistic result between electroactivation catalyst-activation, which controlled applied current density. 1 O 2 direct electron are main active species pathway, achieve high efficiency over pH 3 10. Density functional theory calculations prove CEF increases adsorption energy, lengthens O–O bond PMS, promotes charge transfer. flow-through convection unit achieves operation removal (99.5% 97.5%), low electrical energy (0.15 kWh log –1 –3 leaching (0.81% total single atom Fe). This work reveals critical role fields modulating Fenton-like activity, may advance development other electrocatalytic applications.

Язык: Английский

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Unveiling the versatile performance of transition metal sulfides in peroxymonosulfate activation

Chemical Engineering Journal, Год журнала: 2024, Номер 497, С. 154682 - 154682

Опубликована: Авг. 10, 2024

Язык: Английский

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