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Electrochemical behavior and electro-aging of microplastics: interaction with enrofloxacin and Pb
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Electrochemical experiments investigated how electric fields age microplastics and alter their surface properties, finding that electrochemical oxidation accelerates weathering in ways similar to natural UV aging. This opens the possibility of using electrochemical treatment to deliberately degrade microplastics in controlled water treatment systems.
Microplastic in wastewater and its aging change the fate of pollution transformation during electrochemical treatment, making the treatment effectiveness and environmental risks unpredictable. This study systematically revealed the effect of microplastics on the fate of enrofloxacin (ENR) and lead (Pb) during the electrochemical process, associated aging phenomena and mechanisms of the microplastics. The presence of polypropylene (PP), polystyrene (PS), and polyvinyl chloride (PVC) microplastics affected electron transfer at the electrode interface and electrogenerated reactive oxygen species (ROS). These effects reduced ENR anodizing efficiency by a maximum of 23.67 % compared to the control, and lowered the Pb inhibition threshold for ENR anodizing. PS and PVC, in addition to PP, also impeded the rate of Pb cathodic reduction. Significant microplastic aging occurred during electrochemical processes. Although the sequence of functional group changes varied between anodic and cathodic treatments, both increased oxygen-containing groups and altered electrochemical properties. Meanwhile, ENR promoted microplastic aging via electrogenerated ROS, while Pb inhibited it. Additionally, Pb compounds deposited on microplastics during cathodic reduction, leading to increased Pb re-release and inhibited ENR oxidation when the microplastics were transferred to the anode. This study deepens understanding of environmental behavior and microplastic aging in treatment systems.
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Electrochemical degradation of micro/nanoplastics in water: recent results
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Researchers reviewed electrochemical oxidation—particularly using boron-doped diamond anodes—as an advanced process capable of degrading micro- and nanoplastics in water with over 90% efficiency under optimized conditions. This technology is important because conventional wastewater treatment plants not only fail to fully remove microplastics but can fragment them into smaller, more bioavailable nanoplastics.
Electrochemical degradation of nanoplastics in water: Analysis of the role of reactive oxygen species
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Researchers investigated electrochemical methods for degrading nanoplastics in water and analyzed the role of different reactive oxygen species in the process. They found that the electro-peroxidation process was about 2.6 times more effective than standard electrooxidation, achieving up to 86.8% nanoplastic degradation under optimized conditions. The study presents a promising advanced treatment approach for addressing nanoplastic contamination in water.
Treatment of microplastics in water by anodic oxidation: A case study for polystyrene
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Anodic oxidation (electrooxidation) was tested as a method for degrading polystyrene microplastics suspended in water. The electrochemical treatment showed progressive microplastic degradation, demonstrating potential for electrooxidation as a water treatment approach targeting suspended plastic particles.
Progress on the photo aging mechanism of microplastics and related impact factors in water environment
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This review examined the photo-aging mechanisms of microplastics in aquatic environments, finding that solar UV radiation drives oxidation reactions that alter surface chemistry, fragment particles further, and enhance their capacity to adsorb and release co-occurring pollutants.
Fenton-based aging of low-density polyethylene microplastics and their adsorptive interactions with ofloxacin: kinetics and isotherm studies
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Scientists found that when plastic bags (LDPE) break down in water treatment processes designed to remove pollutants, the resulting microplastic fragments actually become better at soaking up antibiotics like ofloxacin from water. This matters because these "weathered" microplastics could act like tiny sponges, ferrying antibiotics and other contaminants through our water systems and potentially into our bodies, meaning cleanup efforts might unintentionally make microplastic pollution more harmful rather than less.
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