Effect of oxidant addition on the elimination of 2-naphthalenesulfonate in aqueous solutions by electron beam irradiation
| Autor: | Turki S. Alkhuraiji, Nathalie Karpel Vel Leitner |
|---|---|
| Přispěvatelé: | Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Université de Poitiers-Institut de Chimie du CNRS (INC) |
| Rok vydání: | 2016 |
| Předmět: |
Radiation
Aqueous solution Inorganic chemistry 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology 01 natural sciences Mineralization (biology) chemistry.chemical_compound Sulfonate chemistry Yield (chemistry) Radiolysis [CHIM]Chemical Sciences 0210 nano-technology Hydrogen peroxide Naphthalenesulfonate ComputingMilieux_MISCELLANEOUS 0105 earth and related environmental sciences Naphthalene |
| Zdroj: | Radiation Physics and Chemistry Radiation Physics and Chemistry, Elsevier, 2016, 126, pp. 95-102. ⟨10.1016/j.radphyschem.2016.05.016⟩ |
| ISSN: | 0969-806X |
| DOI: | 10.1016/j.radphyschem.2016.05.016 |
| Popis: | Aromatic sulfonated compounds and naphthalene derivatives are major chemical compounds used in the industry. Electron beam irradiation of aqueous solutions of 2-naphthalenesulfonate (90 µM) was investigated under various experimental conditions. The results obtained demonstrate that the 2-NS concentration decreased dramatically on increasing the absorbed dose in the range 0–1000 Gy. The effectiveness of the radiolytic system was demonstrably enhanced by the addition of oxidants (S 2 O 8 2− or H 2 O 2 ). 2-NS removal was higher with S 2 O 8 2− than with H 2 O 2 . For the EB, EB/H 2 O 2 , and EB/S 2 O 8 2− systems, the absorbed doses for 90% elimination of 2-NS (D 90 ) were 700, 480, and 274 Gy, respectively. 2-NS is poorly mineralized by EB but more than 35% mineralization was reached for 15 kGy when oxidants (820 µM S 2 O 8 2− or 935 µM H 2 O 2 ) were added. In all systems, the mineralization yield was markedly higher when air (i.e. dissolved oxygen increase) was introduced between successive doses. For 50% 2-NS removal, seven sulfonated transformation products were identified using LC/MS analyses. For the highest absorbed doses the sulfonate group in 2-NS was converted to sulfate ions in the radiolytic systems. |
| Databáze: | OpenAIRE |
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