Photocatalytic degradation of 1,10-Dichlorodecane in ...
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| Title | Photocatalytic degradation of 1,10-Dichlorodecane in Aqueous suspensions of TiO2: a reaction of Adsorbed chlorinated alkane with Surface hydroxyl radicals. |
| Author(s) | T. El-Morsi, W. Budakowski, A. Abd-El-Aziz, K. Friesen |
| Journal | Section Title: Waste Treatment and Disposal, Environmental Science and Technology |
| Date | 2000 |
| Volume | 34 |
| Issue | 6 |
| Start page | 1018 |
| End page | 1022 |
| Abstract | 1,10-Dichlorodecane (D2C10) is shown to be effectively photodegraded in aq. suspensions of TiO2 using a photoreactor equipped with 300 nm lamps. Solns. exposed to UV light intensities of 3.6 × 10-5 Ein/L-min, established by ferrioxalate actinometry, showed negligible direct photolysis in the absence of TiO2. The degrdn. rate was optimal with 150 mg/L of TiO2 and a D2C10 concn. (240 μg/L) approaching its soly. limit. Kinetics of photodegrdn. followed a Langmuir-Hinshelwood model suggesting that the reaction occurred on the surface of the photocatalyst. The presence of h+vb and OH• radical scavengers, including methanol and iodide, inhibited the degrdn. supporting a photooxidn. reaction. Electron scavengers (Ag+, Cu2+, and Fe3+) had small effects on the degrdn. rate. The lack of transformation of D2C10 in acetonitrile as solvent indicated that the major oxidants were OH• radicals. The presence of tetranitromethane, effectively eliminating the formation of free OH• radicals, did not affect the degrdn. rates significantly. This result, combined with obsd. increases in photolysis rates with the degree of adsorption of D2C10 onto the surface of the photocatalyst, confirmed that the reaction involved adsorbed 1,10-dichlorodecane and surface bound OH• radicals. [on SciFinder(R)] |
| DOI | 10.1021/es9907360 |
| ISSN | 0013-936X |
Using APA 6th Edition citation style.
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