Zhang, Hanjie 1Li, Linghan 1Chen, Na 2Ben, Haijie 2Zhan, Guangming 2Sun, Hongwei 2Li, Qin 1Sun, Jie 1Zhang, Lizhi2
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作者信息
1. South Cent Univ Nationalities
2. Cent China Normal Univ
折叠
Abstract
Heterogeneous-homogeneous coupled Fenton (HHCF) processes compromise the merits of rapid degradation and catalyst reusability, thus are very attractive for environmental remediation and water treatment. However, the development of HHCF processes suffers from the lack of desirable catalysts and Fe(III)/Fe(II) redox cycle (iron cycle) mediators. Herein we demonstrate the combination of hydrogen peroxide, ferric phosphate and hydroxylamine offers a promising HHCF process, where ferric phosphate and hydroxylamine serve as the catalyst and iron cycle mediator, respectively. Hydroxylamine can realize suitable iron release from ferric phosphate, effective iron cycle, and center dot OH consumption, resulting in efficient conversion of H2O2 to center dot OH for sulfamethazine removal. More importantly, the phosphorus release from ferric phosphate and nitrogen residual during this HHCF process are limited to reduce the risk of secondary pollution. This study clarifies the importance of iron dissolution and iron cycle on highly efficient Fenton processes, and also provides a promising antibiotic pollutant removal strategy.
NSTL
Elsevier