期刊
CHEMICAL ENGINEERING JOURNAL
卷 476, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2023.146761
关键词
Electrochemical advanced oxidation processes; (EAOPs); Contaminants of emerging concern (CECs); Slurry reactor; Photoelectrocatalysis; Semi-solid electrode
Graphitic carbon nitride is an effective photoelectrocatalyst for water treatment, particularly for the removal of refractory contaminants. The optimization of a photoelectrocatalytic system using this catalyst achieved high removal rates for pharmaceutical active compounds in wastewater, showing promising potential for wastewater treatment.
Graphitic carbon nitride (g-C3N4) recently emerged as a remarkable photoelectrocatalyst for water treatment. Advanced oxidation processes (AOPs) consisting of photoelectrocatalytic (PEC) systems are being researched towards the development of sustainable strategies for the complete removal of refractory contaminants from effluents of urban wastewater treatment plants (WWTPs). This work consists of the optimisation of a PEC system, composed of a boron-doped diamond (BDD) anode, titanium cathode, and a suspended g-C3N4 photoelectrocatalyst, for the treatment of both synthetic and real urban waste waters spiked with pharmaceutical active compounds (PhACs). Different working parameters were considered and optimised to improve degradation and mineralisation rates, such as the cathode material, anode-to-cathode distance, electrolyte resistivity, and matrix composition. The optimal conditions allowed removals of 100 % diclofenac, 88 % fluoxetine and 77 % ibuprofen in the complex wastewater matrix. Moreover, it was observed that the presence of other refractory organic molecules offered a greater impediment to PEC treatment than residual co-existing substances. The main oxidative agents were investigated by scavenging experiments, showing that generated holes and reactive oxyspecies, i.e. hydroxyl and superoxide radicals, take a major role in the degradation of PhACs. The recyclability of the g-C3N4 suspension as photoelectrocatalyst in the PEC process provides a promising perspective for the development of wastewater treatment units.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据