Simultaneous removal of nitrogen and phosphorus from aqueous environments with recyclable La(OH)3/Fe3C ordered mesoporous carbon electrode

Wang, Yicong; Zhang, Sisuo; Smith, Richard L.; Liu, Xiaoning; Qi, Xinhua

doi:10.1016/j.jclepro.2023.136585

Cited by 5 publications

(1 citation statement)

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“…The stability and reusability of electrodes are one of the key factors affecting the long-term operational e ciency and the cost of electrochemical reaction systems (Wang et al, 2023). In the present work, the wastewater has strong acidity (pH 3.2), thus the electrodes may be corroded due to long-term acidic conditions during the reaction process, and impurities may be produced and mixed in the electrodeposited copper because of the corrosion of the cathode.…”

Section: Evaluation Of Electrode Recyclingmentioning

confidence: 94%

Effective oxidation decomplexation of Cu-EDTA and Cu2+ electrodeposition from PCB manufacturing wastewater by persulfate-based electrochemical oxidation: Performance and mechanisms

Sun,

Liu,

Liu

2024

Environ Sci Pollut Res

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Complex wastewater matrices such as printed circuit board (PCB) manufacturing wastewater present a major environmental concern. In this work, simultaneous decomplexation of metal complex Cu-EDTA and reduction/electrodeposition of Cu 2+ was conducted in a persulfate-based electrochemical oxidation system. Oxidizing/reductive species were simultaneously produced in this system, which realized 99.8% of Cu-EDTA decomplexation, 94.5% of Cu 2+ reduction/electrodeposition and within 3 h treatment under the original solution pH 3.2. Almost complete mineralization (74.1% total organic carbon removal) of the solution was obtained after 3 h of treatment. • OH and SO 4•drove the Cu-EDTA decomplexation, destroying the chelating sites and nally it was effectively mineralized to CO 2 , H 2 O and Cu 2+ . The mechanisms of copper electrodeposition on the stainless steel cathode and persulfate activation by the BDD anode were proposed based on the electrochemical measurements. The electrodes exhibited excellent reusability and low metal (total iron and Ni 2+ ) leaching during 20 cycles of application. This study provide an effective and sustainable method for the application of the electro-persulfate process in treating complex wastewater matrices.

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Section: Evaluation Of Electrode Recyclingmentioning

confidence: 94%