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Article
Open AccessApplication of Fe(III)–EDDS complexes and soybean peroxidase in photo-Fenton processes for organic pollutant removal: insights into possible synergistic effects
Photo-Fenton processes activated by biodegradable Fe(III)–EDDS complexes have attracted huge attention from the scientific community, but the operative mechanism of the photo-activation of H2O2 in the presence of...
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Article
Innovative depollution treatment using multi-valent iron species: from fundamental study to application in municipal wastewater
In this work, a new combination of oxidation treatments for the degradation of bisphenol A (BPA) is investigated. This innovative wastewater (WW) treatment includes the use of ferrate (FeO42−) and its decompositi...
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Article
Open AccessImproving the characterization of dissolved organic carbon in cloud water: Amino acids and their impact on the oxidant capacity
Improving our understanding of cloud chemistry depends on achieving better chemical characterization (90% of the organic carbon [OC] fraction remains uncharacterized) and, consequently, assessing the reactivit...
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Article
Open AccessPhotochemical processes induced by the irradiation of 4-hydroxybenzophenone in different solvents
The singlet and triplet excited states of 4-hydroxybenzophenone (4BPOH) undergo deprotonation in the presence of water to produce the anionic ground-state, causing fluorescence quenching and photoactivity inhi...
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Article
Fe(III)–EDDS complex in Fenton and photo-Fenton processes: from the radical formation to the degradation of a target compound
The present work compares the efficiency of homogenous Fenton and photo-Fenton processes in the presence of Fe(III)–EDDS complex under different experimental conditions. 4-tert-Butylphenol (4-t-BP), which is one ...
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Article
Effect of ethylenediamine-N,N′-disuccinic acid on Fenton and photo-Fenton processes using goethite as an iron source: optimization of parameters for bisphenol A degradation
The main disadvantage of using iron mineral in Fenton-like reactions is that the decomposition rate of organic contaminants is slower than in classic Fenton reaction using ferrous ions at acidic pH. In order t...
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Article
Phototransformation of anthraquinone-2-sulphonate in aqueous solution
Anthraquinone-2-sulphonate (AQ2S) is a triplet sensitiser that has recently been used to model the photoreactivity of chromophoric dissolved organic matter (CDOM). We show that the photolysis quantum yield of ...
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Article
Formation of hydroxyl radicals by irradiated 1-nitronaphthalene (1NN): oxidation of hydroxyl ions and water by the 1NN triplet state
The excited triplet state of 1-nitronaphthalene (31NN*) reacts with OH with a second-order reaction rate constant of (1.66 ± 0.08)×107 M-1 s−1 (μ ± σ). The reaction yields the ·OH radical and the radical anion 1N...
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Article
Photochemical and photosensitised reactions involving 1-nitronaphthalene and nitrite in aqueous solution
The excited triplet state of 1-nitronaphthalene, 1NN, (31NN) is able to oxidise nitrite to •NO2, with a second-order rate constant that varies from (3.56 ± 0.11) × 108 m−1 s−1 (μ±σ) at pH 2.0 to (3.36±0.28) × 109
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Article
The pH-dependent photochemistry of anthraquinone-2-sulfonate
The photochemistry of anthraquinone-2-sulfonate (AQ2S) was studied as a function of pH, combining laser flash photolysis and steady-state irradiation experiments, with the additional help of a computational st...
