Effect of ferroferric oxide nanoparticles on biological nitrogen removal and GHG emissions of denitrification and partial denitrification-anaerobic ammoxidation （PD/A） reactions

LIU Sizheng; ZHOU Wen; YE Yanfei; TAN Tan; YANG Fan; YANG Yiming; LI Jiawei; SUI Qianwen; CHEN Meixue; WEI Yuansong

doi:10.13205/j.hjgc.202512014

Volume 43 Issue 12

Dec. 2025

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2025 > 43(12): 121-128

LIU Sizheng, ZHOU Wen, YE Yanfei, TAN Tan, YANG Fan, YANG Yiming, LI Jiawei, SUI Qianwen, CHEN Meixue, WEI Yuansong. Effect of ferroferric oxide nanoparticles on biological nitrogen removal and GHG emissions of denitrification and partial denitrification-anaerobic ammoxidation （PD/A） reactions[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(12): 121-128. doi: 10.13205/j.hjgc.202512014

Citation:

LIU Sizheng, ZHOU Wen, YE Yanfei, TAN Tan, YANG Fan, YANG Yiming, LI Jiawei, SUI Qianwen, CHEN Meixue, WEI Yuansong. Effect of ferroferric oxide nanoparticles on biological nitrogen removal and GHG emissions of denitrification and partial denitrification-anaerobic ammoxidation （PD/A） reactions[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(12): 121-128. doi: 10.13205/j.hjgc.202512014

Citation:

LIU Sizheng, ZHOU Wen, YE Yanfei, TAN Tan, YANG Fan, YANG Yiming, LI Jiawei, SUI Qianwen, CHEN Meixue, WEI Yuansong. Effect of ferroferric oxide nanoparticles on biological nitrogen removal and GHG emissions of denitrification and partial denitrification-anaerobic ammoxidation （PD/A） reactions[J]. ENVIRONMENTAL ENGINEERING , 2025, 43(12): 121-128. doi: 10.13205/j.hjgc.202512014

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Effect of ferroferric oxide nanoparticles on biological nitrogen removal and GHG emissions of denitrification and partial denitrification-anaerobic ammoxidation （PD/A） reactions

doi: 10.13205/j.hjgc.202512014

1. PowerChina Environmental Engineering Co., Ltd., Hangzhou 310015, China;
2. PowerChina Road Bridge Group Co., Ltd., Beijing 100160, China;
3. Department of Water Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China

Received Date: 2024-09-05
Accepted Date: 2024-10-05
Rev Recd Date: 2024-09-25

Available Online: 2026-01-09

Abstract

Abstract

Wastewater treatment is an important source of methane （CH₄） and nitrous oxide （N₂O） emissions. The method for simultaneously enhancing pollutant removal and reducing greenhouse gas emissions needs to be investigated. Ferric oxide， known as magnetic iron oxide， has the characteristics of better electrical conductivity and magnetism， and it has been gradually paid attention to in pollutants treatment. In this study， a monitoring device for nitrogen removal and greenhouse gas emissions was constructed to investigate the short-term biological effects of ferroferric oxide nanoparticles， and explore the nitrogen removal performance and greenhouse gas emission characteristics of denitrification and partial denitrification-anaerobic ammoxidation （PD/A） reactions. The results showed that， in the treatment of actual domestic sewage， the addition of ferroferric oxide nanoparticles increased the NO^-₃-N removal rate of denitrification by 2.13 times， and N₂O emissions were reduced by 25%. Furthermore， the addition of ferroferric oxide nanoparticles increased the NO^-₃-N removal rate of PD/A reactions by 1.53 times， while decreasing CH₄ and N₂O emissions by 71.4% and 33.3%， respectively. A similar effect was observed in the treatment of simulated wastewater prepared with sodium acetate. As an external carbon source， sodium acetate is widely used in sewage treatment plants， which has a low GHG emission factor while increasing the total nitrogen removal rate. The addition of ferroferric oxide nanoparticles proved to be effective in achieving efficient nitrogen removal in the presence of limited carbon sources， significantly increased NO^-₃-N removal rate， and reduced CH₄ and N₂O emissions. These effects are likely attributed to the promotion of ferroferric oxide nanoparticles on the activity of key functional enzymes and their ability to facilitate electron transfer.
- nitrogen removal,
- anaerobic ammonia oxidation,
- ferroferric oxide nanoparticles,
- methane,
- nitrous oxide

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References(28)

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