Mechanistic insights into peracetic acid activation by iron-biochar composites prepared at low and high temperature for enhanced contaminant degradation: Selective reactive species generation

文献类型： 外文期刊

第一作者： Peng, Guilong

作者： Peng, Guilong;Yan, Yuting;Meng, Xukun;Yan, Yuting;Gong, Wenwen;Qi, Chengdu;Chen, Junhua;Blaney, Lee

作者机构：

关键词： Peracetic acid; Iron-biochar; Acetaminophen; Reactive species; Advanced oxidation

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.2； 五年影响因子：13.5 ）

ISSN： 1385-8947

年卷期： 2025 年 512 卷

页码：

收录情况： SCI

摘要： Iron-based activation of peracetic acid (PAA) is an environmentally friendly and low-cost technology for degrading contaminants. In this study, iron-biochar (Fe-BC) composites were prepared at low temperature (FeBC-300) and high temperature (Fe-BC-800) and used to activate PAA to degrade acetaminophen (ACT). In the FeBC-300/PAA process, Fe(IV) was the dominant reactive species responsible for ACT degradation; in contrast, center dot OH and RO center dot (e.g., CH3C(O)O center dot) were the dominant reactive species in the Fe-BC-800/PAA system. To elucidate the contributions of each reactive species, a mixed probes strategy designed for heterogeneous PAA activation systems was deployed (for the first time) to simultaneously determine the steady-state concentrations of Fe(IV), center dot OH, and RO center dot. The reaction mechanisms were confirmed by treating a suite of organic contaminants with variable ionization potential by the Fe-BC-300/PAA and Fe-BC-800/PAA systems. The experimental results, in combination with density functional theory calculations, confirmed the aforementioned roles of Fe(IV), center dot OH, and RO center dot in Fe-BC/PAA processes. Overall, the new mechanistic insights from this study inform preparation of Fe-BC composites for selective generation of specific reactive species upon PAA activation.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序