Effects of inorganics on the degradation of micropollutants with vacuum UV (VUV) advanced oxidation
| Autor: | Madjid Mohseni, Clara Duca, Gustavo Imoberdorf |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Environmental Engineering
Vacuum Ultraviolet Rays Bicarbonate Inorganic chemistry 02 engineering and technology 010501 environmental sciences Inorganic ions 01 natural sciences Absorbance chemistry.chemical_compound Nitrate Sulfate 0105 earth and related environmental sciences Nitrates Photolysis Hydroxyl Radical Sulfates General Medicine Hydrogen Peroxide Molar absorptivity Models Theoretical 021001 nanoscience & nanotechnology Bicarbonates chemistry Inorganic Chemicals Attenuation coefficient Hydroxyl radical Atrazine 0210 nano-technology Oxidation-Reduction Water Pollutants Chemical |
| Zdroj: | Journal of environmental science and health. Part A, Toxic/hazardous substancesenvironmental engineering. 52(6) |
| ISSN: | 1532-4117 |
| Popis: | This research focused on the effects of inorganic water constituents on the efficiency of vacuum UV (VUV) for the degradation of micropollutants in surface water supplies. Atrazine was used as a model miropollutant, and bicarbonate, sulphate, and nitrate were used as the most common inorganic constituents in the water matrix. First, the absorbance of radiation at 254 and 185 nm was measured in the presence of different ions. At 254 nm, only nitrate showed a measurable absorption coefficient of [Formula: see text] = 3.51 M[Formula: see text] cm[Formula: see text], and all other ions showed a molar absorption coefficient below the detection limit. However, at 185 nm, all the ions showed high absorption coefficients, with nitrate giving the highest absorption coefficient of [Formula: see text] = 5568 M[Formula: see text] cm[Formula: see text]. Second, the hydroxyl radical (HO[Formula: see text]) scavenging effects of the same inorganic ions were evaluated; nitrate and bicarbonate showed a negative effect during the UV/H |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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