Mechanistic insights into the efficient activation of peracetic acid by mackinawite (FeS) for diclofenac degradation under near-neutral conditions: Multiple identification and contribution of non-radicals

被引：0

作者：

Gao, Yao-Feng ^{[1
]}

Duan, Yan-Ping ^{[1
,2
]}

Chen, Yu-Ru ^{[1
]}

Jia, Yuan-Hua ^{[1
]}

Tu, Yao-Jen ^{[1
,2
]}

Dai, Chao-Meng ^{[3
]}

机构：

[1] Institute of Urban Studies, School of Environmental and Geographical Sciences, Shanghai Normal University, 100 Guilin Rd, Shanghai,200234, China

[2] Yangtze River Delta Urban Wetland Ecosystem National Field Observation and Research Station, Shanghai,200234, China

[3] College of Civil Engineering, Tongji University, 1239 Siping Road, Shanghai,200092, China

来源：

Chemical Engineering Journal | 2024年 / 502卷

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/j.cej.2024.158071

中图分类号：

O6 [化学]; TQ03 [化学反应过程]; TQ02 [化工过程（物理过程及物理化学过程）];

学科分类号：

0703 ; 081701 ; 081704 ;

摘要：

Peracetic acid (PAA) as an efficient, accessible, and environmentally friendly organic oxidizer will contribute to addressing the growing global issue of pharmaceutical contamination in aquatic environment. In this study, a low-cost and environmentally abundant mackinawite (FeS) was used to rapidly activate PAA to efficiently remove diclofenac (DCF). Over a wide pH range (3.0–8.0), the FeS/PAA system could achieve 80–100 % removal of DCF within 20 min. The 1O2-dominated non-radical played a dominant role in DCF degradation under near-neutral conditions. The possible degradation pathways of DCF were proposed, and the acute toxicity of DCF was significantly reduced after treatment by the FeS/PAA system. Cl−, SO42−, NO3−, and HCO3− had virtually no substantive influence on the removal of DCF, while HA and CO32− had an inhibiting effect. In addition, the FeS/PAA system showed excellent anti-disturbance and decontamination abilities on multiple pharmaceuticals in real water samples, which demonstrated the potential application of the FeS/PAA system with a non-radical pathway in the treatment of pharmaceutical pollution in real water bodies. This study provides a new non-radical approach to degrade pharmaceuticals by efficiently activating PAA via heterogeneous FeS. © 2024 Elsevier B.V.

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