Cu(II)-EDTA removal by a two-step Fe(0) electrocoagulation in near natural water: Sequent transformation and oxidation of EDTA complexes

Xie, Shiwei; Shao, Wei; Zhan, Hui; Wang, Zheng; Ge, Chengcheng; Li, Qingjie; Fu, Wenjing

doi:10.1016/j.jhazmat.2020.122473

Cited by 21 publications

(1 citation statement)

References 49 publications

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“…Some promising treatment methods for removing the stable complex from wastewater have received extensive attention, such as electro-coagulation (Xie et al, 2020), nonthermal plasma oxidation (Wang et al, 2019;Liu et al, 2021), photo-electrocatalytic oxidation (He et al, 2021;Shah and Patel, 2021), ozone-based oxidation (Zhao et al, 2018a;Guan et al, 2022), and microwaveassisted Fenton reaction (Wang H. et al, 2020;Xia et al, 2021). Electrochemical advanced oxidation processes (EAOPs) are sought-after for many researchers due to their high degradation efficiency, versatility, and environmental friendliness (Wang and Zhuan, 2020;Wang and Chen, 2021;.…”

Section: Introductionmentioning

confidence: 99%

Decomplexation Performance of Cu–EDTA and Parameter Optimization by Three-Dimensional Electro-Fenton

Huang

Han³

et al. 2022

Front. Environ. Sci.

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The strong stability of Cu–ethylenediaminetetraacetic acid (Cu–EDTA) results in the low decomplexation efficiency by the traditional Fenton process. For breaking this limitation, a three-dimensional electro-Fenton (3D-EF) system was constructed to study the decomplexation of Cu–EDTA at different pH, and the effects of Fe2+ concentration, particle electrode dosage, current density, and coexisting ions on decomplexation performance were investigated. The results showed that 3D-EF exhibited high pollutant removal efficiency in a wide pH range compared with the traditional electro-Fenton process. The optimal conditions for the removal of Cu–EDTA were as follows: the pH was 7, Fe2+ was 1 mmol L−1, granular activated carbon was 2 g L−1, and current density was 10 mA cm−2, and the optimum Cu–EDTA removal efficiency reached 90.95%. In addition, the presence of Cl− slightly improved the decomplexation efficiency, whereas NO3− and HPO42− inhibited the removal of Cu–EDTA. The kinetics of Cu–EDTA decomplexation in all experimental groups followed the first-order kinetic equation.

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