文献类型：期刊文献

英文题名：Zero valent iron and amorphous boron-assisted nano calcium peroxide/Fe (III) system for naphthalene degradation: Efficient performance and diverse mechanisms

作者：Liu, Yulong[1];Sheng, Xianxian[1];Sun, Yong[2];Habib, Mudassir[1];Sui, Qian[1];Fu, Rongbing[3];Lyu, Shuguang[1]

机构：[1]East China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asses, Shanghai 200237, Peoples R China;[2]Shanghai Municipal Engn Design Inst Grp Co Ltd, Shanghai 200092, Peoples R China;[3]Tongji Univ, Ctr Environm Risk Management & Remediat Soil & Gro, State Key Lab Pollut Control & Resource Reuse, Shanghai 200092, Peoples R China

年份：2024

卷号：484

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001188491100001)】；

基金：This study was financially supported by the National Key R & D Pro- gram of China (No. 2023YFC3707700) and Shanghai Sailing Program (23YF1442300) .

语种：英文

外文关键词：Nano calcium peroxide; Zero valent iron; Amorphous boron; Fe(III)/Fe(II) cycle; Activation mechanism

摘要：Nano calcium peroxide (nCP) has attracted attention as an alternative for liquid H2O2-mediated advanced oxidation processes. However, the slow reduction kinetics of Fe(III) still significantly limit its application. Here, zero valent iron (ZVI) and amorphous boron (B) could remarkably promote the Fe(III)/Fe(II) cycle in nCP/Fe(III) system to generate various active species (HO center dot, O2  center dot, and 1O2) with HO center dot acting as the predominant role in naphthalene (NAP) degradation. nCP/Fe(III)/ZVI process could achieve 98.2% NAP degradation and 70.6% TOC removal, compared with 97.5% NAP degradation and 56.3% TOC removal in nCP/Fe(III)/B process. ZVI could donate electrons to Fe(III) to generate Fe(II) and itself could also be corroded to release Fe(II). B was stepwise oxidized (B0 to B(I)/B(II) to B2O3) and continuously supplied electrons to Fe(III) to ensure fast and long-lasting Fe (II) generation. Moreover, B2O3 was dissolved as H3BO3 in aqueous solution, which kept the B surface reactive for the continuous reduction of Fe(III). Although the two co-activators showed different promotion mechanisms in nCP/Fe(III) system, both systems exhibited excellent NAP degradation performance in different experimental conditions and various water matrixes. Overall, this study provided the strategies to overcome the limitation of nCP/Fe(III) system and extended its application potential in contaminants remediation.