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• W2914705364 abstract "In this work, potassium permanganate particles (KMnO4) were modified with a manganese oxide (MnOx) shell comprising passages for the slow release of permanganate ions (MnO4-) in aquatic systems. The bare particle (KMnO4) and KMnO4 core-MnOx shell particles (CP-60) were characterized by attenuated total reflectance (ATR)-Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and X-ray photoelectron spectroscopy (XPS). The CP-60 were evaluated as a slow source of MnO4- for the oxidative treatment of pure and lake water containing dimethyl trisulfide (DMTS), a water odorant produced by cyanobacteria in many eutrophic waters. XPS and ATR-FTIR results confirmed the presence of MnOx surface shell (diameter ∼ 1 μm) on CP-60. SEM images revealed cracks on CP-60, which serve as outlets for MnO4-. Approximately 0.76 ± 0.07 g KMnO4/g of CP-60 was released from the core of CP-60 after 120 min. The CP-60 degraded 88.9 ± 2.5% and 70.8 ± 6.3% of DMTS in pure water and lake water matrix within 120 min, respectively. The degradation was slightly more effective than the degradation using aqueous KMnO4 (74.2%) reported in literature. The release kinetics of the particles is consistent with a pseudo-first order equation with correlation coefficients of 0.99 and 0.97 in pure water and lake water matrix, respectively. The CP could serve as low cost slow-release particles for the degradation of micropollutants, even in cyanobacteria laden water. Notably, the in situ MnOx formed during the KMnO4 oxidation reaction can facilitate adsorption of organics and metal ions, improving water quality." @default.
• W2914705364 created "2019-02-21" @default.
• W2914705364 creator A5019981546 @default.
• W2914705364 creator A5020487284 @default.
• W2914705364 date "2019-05-01" @default.
• W2914705364 modified "2023-10-02" @default.
• W2914705364 title "Slow-releasing permanganate ions from permanganate core-manganese oxide shell particles for the oxidative degradation of an algae odorant in water" @default.
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• W2914705364 doi "https://doi.org/10.1016/j.chemosphere.2019.02.036" @default.
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