Efficient treatment of old landfill leachate by peroxodisulfate assisted electro-oxidation and electro-coagulation combined system

被引：5
作者：
Ma D. [1 ]
Wang D. [2 ]
Wang X. [3 ]
Wang Q. [3 ]
Hu Y. [2 ,4 ]
机构：
[1] School of Environmental Science and Engineering, Huazhong University of Science and Technology (HUST), Hubei, Wuhan
[2] School of Environmental Science and Engineering, Hubei Key Laboratory of Mine Environmental Pollution Control &Remediation, Hubei Polytechnic University, Hubei, Huangshi
[3] Nankong Environmental Energy Technology Research Institute Co., Ltd, Hubei, Qianjiang
[4] College of Life Sciences, Hubei Normal University, Huangshi
来源：
Chemosphere | 2024年 / 346卷
关键词：
Dual-anode; Electro-coagulation; Electro-oxidation; Old landfill leachate; Peroxodisulfate;
D O I：
10.1016/j.chemosphere.2023.140675
中图分类号：
学科分类号：
摘要：
Efficient removal of chemical oxygen demand (COD) and ammonium-N (NH4+-N) is the key issue for treatment of old landfill leachate. In this study, a peroxodisulfate assisted electro-oxidation and electro-coagulation coupled system (POCS) adopting Ti/SnO2–Sb2O3/TiO2 and Fe dual-anode was constructed for synergistic removal of COD and NH4+-N in old landfill leachate. Laboratory experiment results showed that with current density of 20 mA cm−2, initial pH value of 8.0 and peroxodisulfate (PDS) concentration of 60 mM, the POCS system can reach removal efficiencies of 84.2% for COD and 39.8% for NH4+-N. The POCS effectively reduced the complexity of macromolecular organics and avoided the need to add acid or base to adjust pH value. The residual NH4+-N could be effectively recovered through struvite precipitation with a 93.8% purity of the precipitate. © 2023 Elsevier Ltd
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