Removal of EDTA-Cu(II) from Water Using Synergistic Fenton Reaction-Assisted Adsorption by Nanomanganese Oxide-Modified Biochar: Performance and Mechanistic Analysis

Metal complexes exhibit higher stability in water, making metal removal more challenging. In this study, a low-cost, high-efficiency, and multifunctional nanomanganese oxide-modified biochar (BC-MnOx) was used for synergistic adsorption processes and Fenton reaction catalysis to achieve the removal...

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Published in:ACS ES&T water 2021-05, Vol.1 (5), p.1302-1312
Main Authors: Zhu, Ying, Fan, WenHong, Feng, WeiYing, Wang, Ying, Liu, Shu, Dong, ZhaoMin, Li, XiaoMin
Format: Article
Language:English
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Summary:Metal complexes exhibit higher stability in water, making metal removal more challenging. In this study, a low-cost, high-efficiency, and multifunctional nanomanganese oxide-modified biochar (BC-MnOx) was used for synergistic adsorption processes and Fenton reaction catalysis to achieve the removal of EDTA-Cu­(II). Using this system, the Cu and total organic carbon removal efficiencies reached 94.67% and 92.79%, respectively. Mechanistic analysis indicated that multifunctional BC-MnOx catalyzed the Fenton reaction to generate hydroxyl radicals (HO•) capable of attacking the EDTA-Cu­(II) complex structure and releasing low-molecular weight organic matter-Cu compounds due to the simultaneous decarboxylation at different positions, which were concurrently adsorbed by modified biochar. The modified biochar assessed in this study offers high-efficiency Cu complex removal, high stability, low cost, and widespread availability, laying a promising foundation for its practical applicability and potential suitability for the removal of other metal complexes.
ISSN:2690-0637
2690-0637
DOI:10.1021/acsestwater.1c00031