电化学
X射线光电子能谱
盐酸四环素
活性炭
氧化还原
降级(电信)
核化学
化学
材料科学
电极
无机化学
化学工程
四环素
吸附
有机化学
电信
生物化学
抗生素
物理化学
计算机科学
工程类
作者
Xiangxin Meng,Yang Ren,Xuan Zhang,Jinrui Liu,Yue Ding,Guangfei Gao,Wenqiang Jiang
标识
DOI:10.1016/j.seppur.2023.124526
摘要
In this study, Fe/Mn/Cu trimetal-doped activated carbon particle electrodes (FMC-AC) were filled into a novel three-dimensional electrochemical reactor (N3D-FMC-AC) for the degradation of tetracycline hydrochloride (TCH). It was derived from different doping experiments that trimetallic doping was preferred over bimetallic and monometallic doping and that there were synergistic effects between Fe, Mn, and Cu. The optimal ratio of trimetallic doping was determined by orthogonal experiments, which could obtain 97.03% TCH degradation in 80 min. EPR analysis and radical quenching effect experiments revealed the presence of ·OH and ·SO4−. Compared with the common 3D electrochemical reactor filled with FMC-AC (C3D-FMC-AC), the novel 3D electrochemical reactor filled with activated carbon (N3D-AC),and the 2D electrochemical reactor (2D), it was found that N3D-FMC-AC can activate the production of more ·OH and ·SO4−, while OH was the dominant reactive species for TCH degradation. Besides, various degradation routes of TCH were proposed, and the toxicity of intermediates was evaluated. The characterizations by SEM, XRD, and XPS indicated that the cathodic reduction reaction could facilitate electron transfer to Fe(III), Mn(III), and Cu(II), triggering the sustainable Fe(II)/Fe(III), Mn(I)/Mn(III)/Mn(IV), or Cu(I)/Cu(II) redox cycles. The above results suggested that the N3D-FMC-AC process was an efficient and sustainable technology for TCH wastewater treatment and provided a reference for the treatment of tetracycline-type wastewater.
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