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Activated carbon catalytic membrane for persulfate activation of ammonia nitrogen oxidation in water
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Han-ling JIANG1, Chen-xi WU1, Ai-juan ZHOU1, Xiao-bo GONG1, 2, Jin-wen WANG1, 2, Yong LIU1, 2, *
China Environmental Science | 2025, 45(6) : 3063 - 3072
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China Environmental Science | 2025, 45(6): 3063-3072
• Water Pollution Control •
Activated carbon catalytic membrane for persulfate activation of ammonia nitrogen oxidation in water
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Han-ling JIANG1, Chen-xi WU1, Ai-juan ZHOU1, Xiao-bo GONG1, 2, Jin-wen WANG1, 2, Yong LIU1, 2, *
Affiliations
  • 1.College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China
  • 2.Key Laboratory of Treatment for Special Wastewater of Sichuan Province Higher Education System, Chengdu 610066, China
Published: 2025-06-20
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A novel catalytic membrane (AC-MgO@PVDF) was fabricated by loading activated carbon (AC) and MgO onto a poly (vinylidene fluoride) (PVDF) membrane using a vacuum filtration method. The as-prepared catalytic membrane (AC-MgO@PVDF) was employed to activate persulfate (PS) for the oxidation of ammonia nitrogen (NH4+-N) in aqueous solution. The structure and elemental composition of the catalytic membrane were characterized by SEM, Raman and XPS. The efficiency and mechanism of NH4+-N oxidation by the AC-MgO@PVDF/PS system were investigated. The results showed that under the conditions of a flow rate of 1mL/min, a PS dosage of 8g/L and an AC loading of 4.8mg/cm2, the removal rate of 30mg N/L NH4+-N and the nitrogen gas (N2) selectivity of the NH4+-N oxidation products reached 100% and 91.7%, respectively, after 25min of operation. The system exhibited a broad pH tolerance range (3~12) and was barely affected by common anions and natural organic matters in water body. Even after 240min of continuous operation, the system could still achieve a removal rate of over 60% for NH4+-N. Quenching experiments, EPR measurements, and electrochemical tests revealed that f NH4+-N was primarily oxidized through a non-radical pathway, with direct electron transfer being the main mechanism for its oxidation to N2.

wastewater treatment  /  advanced oxidation  /  catalytic membrane  /  ammonia nitrogen  /  nitrogen gas selectivity
Han-ling JIANG, Chen-xi WU, Ai-juan ZHOU, Xiao-bo GONG, Jin-wen WANG, Yong LIU. Activated carbon catalytic membrane for persulfate activation of ammonia nitrogen oxidation in water[J]. China Environmental Science, 2025 , 45 (6) : 3063 -3072 .
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Year 2025 volume 45 Issue 6
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  • Receive Date：2024-11-26
  • Online Date：2026-02-27
  • Published：2025-06-20
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  • Received：2024-11-26
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Affiliations
    1.College of Chemistry and Materials Science, Sichuan Normal University, Chengdu 610066, China
    2.Key Laboratory of Treatment for Special Wastewater of Sichuan Province Higher Education System, Chengdu 610066, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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