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Evaluation of Fenton, Photo-Fenton and Fenton-like Processes in Degradation of PE, PP, and PVC Microplastics
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Scientists tested whether Fenton-based chemical processes, which use iron and hydrogen peroxide to create powerful cleaning reactions, could break down common microplastics in water. They found that the photo-Fenton process (using UV light) was effective at degrading polyethylene and PVC microplastics, but polypropylene was resistant to all treatments. This research is important because it explores practical ways to destroy microplastics in water treatment, though not all plastic types respond equally.
The global problem of microplastics in the environment is “inspiring” scientists to find environmentally friendly and economically viable methods to remove these pollutants from the environment. Advanced oxidation processes are among the most promising methods. In this work, the potential of Fenton, photo-Fenton, and Fenton-like processes for the degradation of microplastics from low-density polyethylene (LDPE), polypropylene (PP), and poly(vinyl chloride) (PVC) in water suspensions was investigated. The influence of three parameters on the efficiency of the degradation process was tested: the pH of the medium (3–7), the mass of added iron (10–50 times less than the mass of microplastics), and the mass of added H2O2 (5–25 times more than the mass of added iron). The effectiveness of the treatment was monitored by FTIR-ATR spectroscopy. After 60-min treatments, the PP microparticles were found to be insensitive. In the Fenton treatment of PVC and the photo-Fenton treatment of LDPE and PVC, changes in the FTIR spectra related to the degradation of the microplastics were observed. In these three cases, the treatment parameters were optimized. It was found that a low pH (3) and a high iron mass (optimal values were 1/12 and 1/10 of the mass of the microplastics for LDPE and PVC, respectively) favored all three. The degradation of LDPE by the photo-Fenton treatment was favored by high H2O2 concentrations (25 times higher than the mass of iron), while these concentrations were significantly lower for PVC (11 and 15 times for the Fenton and photo-Fenton treatment, respectively), suggesting that scavenging activity occurs.
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The Photo-Fenton Method Aids Microplastic Degradation: Experimental Findings Highlight Significant Differences Among Plastic Types
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Researchers tested Fenton-based oxidation methods on three common microplastics (LDPE, PP, PVC) under varying acidity, iron, and hydrogen peroxide conditions, finding that Photo-Fenton is highly effective for LDPE and promising for PVC, but that PP is resistant to all Fenton-based treatments.
Comprehensive screening of microplastic degradation by photo-Fenton oxidation: A comparative approach between different polymers
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Scientists tested a water-treatment method (using light, iron, and hydrogen peroxide) to break down tiny plastic fragments called microplastics, which are showing up in our water, food, and even our bodies. They found this treatment could break down up to 74% of some plastic types like polystyrene (foam packaging), though others like PET (common in bottles) and PVC broke down less easily—suggesting this technique could someday help remove more microplastic pollution from water, but effectiveness depends heavily on the specific plastic type involved.
Advanced Oxidation Processes For Microplastic Removal From Water: A Comparative Study Of UV/H₂O₂, Ozonation, And Fenton Reactions
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Lab tests treated water samples spiked with polyethylene and polystyrene microplastic particles using three chemical treatment methods. All three methods broke down 68% to 95% of the microplastics, with the Fenton reaction working best and smaller particles breaking down more easily than larger ones.
Photo-fenton oxidation of microplastics: Impact of polymer nature
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Researchers tested photo-Fenton oxidation as a treatment method for microplastics, comparing degradation efficiency across different polymer types. The study found that polymer chemistry significantly influences how quickly microplastics break down under this oxidative treatment.
Systematic assessment of the water-matrix effect on the photo-Fenton oxidation of polystyrene micro-nanoplastics
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Scientists tested a water treatment method that uses light, iron, and hydrogen peroxide (called photo-Fenton oxidation) to break down microscopic plastic particles in water, and found it can fully destroy these plastics even in real-world water sources like tap water, bottled water, and treated wastewater—though minerals and organic matter naturally found in water slow the process down. This matters because it shows a practical path toward removing tiny plastic particles from our drinking water and water recycling systems, which could reduce human exposure to microplastics linked to health concerns.
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