TY - JOUR
T1 - Insight into CaO2-based Fenton and Fenton-like systems
T2 - Strategy for CaO2-based oxidation of organic contaminants
AU - Xue, Yunfei
AU - Sui, Qian
AU - Brusseau, Mark L.
AU - Zhou, Wei
AU - Qiu, Zhaofu
AU - Lyu, Shuguang
N1 - Funding Information:
This study was financially supported by a grant from the International Academic Cooperation and Exchange Program of Shanghai Science and Technology Committee (18230722700). The contributions of Mark Brusseau were supported by the NIEHS Superfund Research Program of the United States (PS 42 ES04940).
Funding Information:
This study was financially supported by a grant from the International Academic Cooperation and Exchange Program of Shanghai Science and Technology Committee ( 18230722700 ). The contributions of Mark Brusseau were supported by the NIEHS Superfund Research Program of the United States (PS 42 ES04940).
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/4/1
Y1 - 2019/4/1
N2 - This study conducted a comparison of the CaO2-based Fenton (CaO2/Fe(II)) and Fenton-like (CaO2/Fe(III)) systems on their benzene degradation performance. The H2O2, Fe(II), Fe(III), and HO[rad] variations were investigated during the benzene degradation. Although benzene has been totally removed in the two systems, the variation patterns of the investigated parameters were different, leading to different benzene degradation patterns. In terms of the Fe(II)/Fe(III) conversion, the CaO2/Fe(II) and CaO2/Fe(III) systems were actually inseparable and had the inherent mechanism relationships. For the CaO2/Fe(III) system, the initial Fe(III) must be converted to Fe(II), and then the consequent Fenton reaction could be later developed with the regenerated Fe(II). Moreover, some benzene degradation intermediates could have the ability to facilitate the transformation of the Fe(III) to Fe(II) without the classic H2O2-associated propagation reactions. By varying the Fe(II) dosing method, an effective degradation strategy has been developed to take advantage of the two CaO2-based oxidation systems. The proposed strategy was further successfully tested in TCE degradation, therefore extending the potential for the application of this technique.
AB - This study conducted a comparison of the CaO2-based Fenton (CaO2/Fe(II)) and Fenton-like (CaO2/Fe(III)) systems on their benzene degradation performance. The H2O2, Fe(II), Fe(III), and HO[rad] variations were investigated during the benzene degradation. Although benzene has been totally removed in the two systems, the variation patterns of the investigated parameters were different, leading to different benzene degradation patterns. In terms of the Fe(II)/Fe(III) conversion, the CaO2/Fe(II) and CaO2/Fe(III) systems were actually inseparable and had the inherent mechanism relationships. For the CaO2/Fe(III) system, the initial Fe(III) must be converted to Fe(II), and then the consequent Fenton reaction could be later developed with the regenerated Fe(II). Moreover, some benzene degradation intermediates could have the ability to facilitate the transformation of the Fe(III) to Fe(II) without the classic H2O2-associated propagation reactions. By varying the Fe(II) dosing method, an effective degradation strategy has been developed to take advantage of the two CaO2-based oxidation systems. The proposed strategy was further successfully tested in TCE degradation, therefore extending the potential for the application of this technique.
KW - Application strategy
KW - Calcium peroxide
KW - Fenton system
KW - Fenton-like system
KW - Hydroxyl radicals
UR - http://www.scopus.com/inward/record.url?scp=85059141672&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85059141672&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2018.12.121
DO - 10.1016/j.cej.2018.12.121
M3 - Article
AN - SCOPUS:85059141672
VL - 361
SP - 919
EP - 928
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
SN - 1385-8947
ER -