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Removal of glyphosate via direct electron transfer based on PMS by adding NaOH and the corresponding mechanism
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Ying WANG1, Chi ZHANG2, 3, Jia-qi WANG2, 3, Ya-song CHEN2, 3, *, Xiao-qiang AN1, Hua-chun LAN1
China Environmental Science | 2025, 45(6) : 3111 - 3117
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China Environmental Science | 2025, 45(6): 3111-3117
• Water Pollution Control •
Removal of glyphosate via direct electron transfer based on PMS by adding NaOH and the corresponding mechanism
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Ying WANG1, Chi ZHANG2, 3, Jia-qi WANG2, 3, Ya-song CHEN2, 3, *, Xiao-qiang AN1, Hua-chun LAN1
Affiliations
  • 1.State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China
  • 2.Yangtze River Eco-Environmental Engineering Research Center, China Three Gorges Corporation, Wuhan 430010, China
  • 3.National Engineering Research Center for Eco-environment Protection of Yangtze River Economic Belt, Wuhan 430010, China
Published: 2025-06-20
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The removal efficiency of glyphosate may be affected due to the quenching process of radicals by in-situ produced inorganic phosphorous. To address the problem, we have developed a novel approach to achieve the direct electron transfer between glyphosate and PMS by adding NaOH to adjust the pH values. The effectiveness and mechanisms of glyphosate degradation in various NaOH concentration were evaluated by several experiments: optimizing the concentrations of reactants, radical trapping tests, and electron paramagnetic resonance (EPR) characterization. Varying pH could change the morphologies of glyphosate and PMS, as a result, accompanied the various glyphosate removal rate. Under alkaline condition, the mechanisms of glyphosate degradation depended on the direct electron transfer process, and insignificant contribution of hydroxyl and sulfate radicals. Thus, it effectively prevented the negative effects on radical oxidation by produced inorganic phosphorous during glyphosate removal processes. As a result, glyphosate (10mg/L) was completely decomposed after five minutes with the addition of 5mmol/L PMS and 6mmol/L NaOH.

pH  /  PMS  /  glyphosate  /  inorganic phosphorous  /  electron transfer process
Ying WANG, Chi ZHANG, Jia-qi WANG, Ya-song CHEN, Xiao-qiang AN, Hua-chun LAN. Removal of glyphosate via direct electron transfer based on PMS by adding NaOH and the corresponding mechanism[J]. China Environmental Science, 2025 , 45 (6) : 3111 -3117 .
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Year 2025 volume 45 Issue 6
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Article Info
  • Receive Date：2024-10-18
  • Online Date：2026-02-27
  • Published：2025-06-20
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  • Received：2024-10-18
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Affiliations
    1.State Key Joint Laboratory of Environment Simulation and Pollution Control, Tsinghua University, Beijing 100084, China
    2.Yangtze River Eco-Environmental Engineering Research Center, China Three Gorges Corporation, Wuhan 430010, China
    3.National Engineering Research Center for Eco-environment Protection of Yangtze River Economic Belt, Wuhan 430010, China
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表12种不同金属材料的力学参数
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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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