High-efficient decomplexation of Cu-EDTA and Cu removal by high-frequency non-thermal plasma oxidation/alkaline precipitation

Liu, Yue; Wang, Danfeng; Xue, Mingming; Song, Ruiying; Zhang, Ying; Qu, Guangzhou; Wang, Tiecheng

doi:10.1016/j.seppur.2020.117885

Cited by 43 publications

(9 citation statements)

References 59 publications

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“…The degradation of EDTA-containing wastewaters by EAOP has been investigated in various earlier studies. ,− Most researchers have focused on the development of novel electrodes to enhance the degradation of EDTA and metal recovery during the EAOP process. Hu et al showed that nearly 99% of the dominant Cu-EDTA complex and 18.7% TOC were removed using an EAOP employing a Ni/GO-PAC particle electrode .…”

Section: Introductionmentioning

confidence: 99%

Kinetic Modeling of the Anodic Degradation of Ni-EDTA Complexes: Insights into the Reaction Mechanism and Products

et al. 2023

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In this study, an electrochemical advanced oxidation process (EAOP) was employed to effectively degrade complexes of nickel and ethylenediaminetetraacetic acid (EDTA) present in electroless nickel plating wastewaters. Our results show that Ni-EDTA complexes can be effectively degraded by an EAOP with degradation of the complexes occurring at/near the anode surface via interaction with hydroxyl radicals generated on water splitting. Our results further show that the rate of Ni-EDTA degradation is not a function of the rate of any particular chemical reaction but, rather, is controlled by the rate of transport of Ni-EDTA to the anode surface. The oxidation of EDTA to smaller noncomplexing entities releases Ni 2+ , which is subsequently deposited onto the cathode as Ni 0 . While complete Ni-EDTA removal and Ni recovery are achieved within 2 h, the overall TOC removal by EAOP is limited, with only 50% TOC removal achieved after 2 h of treatment. The low affinity of small molecular weight EDTA degradation products (such as formic acid, glycine, oxamic acid, and acetic acid) for the anode surface limits oxidation of these compounds and overall TOC removal by the anodic oxidation process. We have developed a mathematical kinetic model that satisfactorily describes Ni-EDTA removal, Ni recovery, and TOC removal over a range of Ni and EDTA concentrations and provides a good description of the oxidation of various EDTA degradation intermediates. The mathematical model developed here, when coupled with the hydrodynamics of the electrochemical cell using a computational fluid dynamics tool, can assist in both cell design and the selection of operating parameters such that the performance of the EAOP process for Ni-EDTA degradation and TOC removal is optimized.

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Section: Introductionmentioning

confidence: 99%

Kinetic Modeling of the Anodic Degradation of Ni-EDTA Complexes: Insights into the Reaction Mechanism and Products

et al. 2023

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“…A considerable number of studies published recently have focused on decomplexing copper-EDTA by means of non-thermal plasma oxidation, either alone or combined with alkaline precipitation. [202][203][204][205][206][207] Zhu et al 76 discuss various methods for removing chelated heavy metals from wastewater, including their underlying mechanisms. The microwave-assisted Fenton reaction was shown to be effective in the rapid decomplexation of Ni-EDTA.…”

Section: Degradation Of Heavy Metal Complexes By Advanced Oxidation P...mentioning

confidence: 99%

Heavy metal pollution in the aquatic environment: efficient and low-cost removal approaches to eliminate their toxicity: a review

et al. 2023

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“…[3][4][5][6][7][8][9][10][11][12] For instance, Yue Liu et al employed high-frequency non-thermal plasma oxidation/alkaline precipitation to effectively decouple and precipitate copper ions. [13] Mohamed Charif Benalia et al achieved simultaneous removal of heavy metal ions (Cu 2+ and Zn 2+ ) from industrial wastewater in the electric cable industry through lime (Ca(OH) 2 ), caustic soda (NaOH), and soda ash (Na 2 CO 3 ) chemical precipitation, with an efficiency of over 90% for copper and zinc ions. [14] Yongjun Sun et al successfully designed and prepared bifunctional MACA copolymers with pH tolerance by grafting acrylamide and thioglycolic acid onto CMCTS through UV light-initiated graft polymerization and evaluated the performance of MACA in flocculating heavy metalcontaminated wastewater.…”

Section: Introductionmentioning

confidence: 99%

Derivatives Based on Cyclodextrin Structure for Adsorption of Heavy Metal Ions and Organic Pollutants in Wastewater

Shang,

Wang,

Zhang

et al. 2023

Advanced Sustainable Systems

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This study provides a solution for the treatment of heavy metal ions as well as common organic pollutants in water by adsorption, which contributes to the achievement of sustainable development goals. In this work, a new adsorption material, β‐cyclodextrin‐acrylic acid‐acrylamide (CD‐AA‐AM‐MBA), is synthesized. The structure of the materials is characterized and analyzed using fourier transform infrared spectroscopy (FT‐IR), Xray diffraction spectroscopy(XRD), scanning electron microscopy(SEM) and thermogravimetric analysis(TGA). The effects of initial ion concentration, contact time, and different pH values on the adsorption performance are studied. Under the optimized conditions, the adsorption capacity in CD‐AA‐AM‐MBA of Cu2+, Pb2+, Cd2+, Methylene Blue(MB), Methyl Orange(MO), phenol, m‐cresol and p‐cresol are 58.66, 326, 48.5, 58.27, 51.34, 6.63, 3.7 and 5.91 mg g−1.

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High-efficient decomplexation of Cu-EDTA and Cu removal by high-frequency non-thermal plasma oxidation/alkaline precipitation

Cited by 43 publications

References 59 publications

Kinetic Modeling of the Anodic Degradation of Ni-EDTA Complexes: Insights into the Reaction Mechanism and Products

Kinetic Modeling of the Anodic Degradation of Ni-EDTA Complexes: Insights into the Reaction Mechanism and Products

Heavy metal pollution in the aquatic environment: efficient and low-cost removal approaches to eliminate their toxicity: a review

Derivatives Based on Cyclodextrin Structure for Adsorption of Heavy Metal Ions and Organic Pollutants in Wastewater

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