Utilizing Fe-C and PbO2 modified electrodes for the electrochemical treatment of pickled vegetable wastewater

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2024-11-30 DOI:10.1016/j.jwpe.2024.106534

Likun Huang , Xinyu Feng , Guangzhi Wang , Dandan Wang , Zhe Li , Xiyu Sun , Huixian Wang , Jingyi Zhang

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Abstract

The objective of this study was to enhance the treatment efficiency of chemical oxygen demand (COD), total phosphorus (TP), and ammonia nitrogen (NH₄⁺-N) in pickled vegetable wastewater, as well as to improve the electrode's stability. Iron carbon micro-electrolysis (FeC) was employed for the pretreatment of wastewater, followed by a secondary treatment utilizing PbO₂ modified electrodes in the electrochemical advanced treatment process. The optimal operational conditions for Iron‑carbon micro-electrolysis (Fe/C = 1.2:1, volume ratio of iron to water = 1:1, pH = 5.4, reaction time = 4 min). For the electrochemical method, the optimal operational conditions included a plate spacing of 2.00 cm, a degradation temperature of 65 °C, a current density of 50 mA/cm², and a pH of 6. The optimal doping ratio of La in the Ti/SnO₂-Sb₂O₅/La-PbO₂ modified anode was found to be 10 mmol/L, with a theoretical lifespan of 5670 h. Under these conditions, the removal rates for TP, COD, NH₄⁺-N, and salinity (as Cl⁻) from the pickled vegetable wastewater were 96.67 %, 70.03 %, 79.88 %, and 6.09 %, respectively.

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies