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| Content Provider | Springer Nature Link |
|---|---|
| Author | Shih, Yang hsin Lin, Cheng han |
| Copyright Year | 2011 |
| Abstract | Titanium dioxide (TiO$_{2}$) nanoparticle powders have been extensively studied to quickly photodegrade some organic pollutants; however, the effect of the particle size of TiO$_{2}$ nanoparticle aggregates on degradation remains unclear because microscale aggregates form once the nanoparticle powders enter into water.The degradation of azo dye by different particle sizes of TiO$_{2}$ nanoparticle aggregates controlled by NaCl concentrations was investigated to evaluate the particle size effect. Removal reactions of reactive black 5 (RB5) with TiO$_{2}$ nanoparticles followed pseudo-first-order kinetics.The increase of TiO$_{2}$ dosage from 40 to 70 mg/L enhanced the degradation. At doses around 100 mg/L TiO$_{2}$, degradation rates decreased which could be the result of poor UV light transmittance at high-particle concentrations. At average particle sizes of TiO$_{2}$ nanopowders less than around 500 nm, the degradation rates increased with decreasing particle size. As the average particle size exceeded 500 nm, the degradation rates were not significantly changed.For the complete degradation experiments, the mineralization rates of total organic carbon disappearance are generally following the RB5 decolorization kinetic trend. These findings can facilitate the application of TiO$_{2}$ nanoparticles to the design of photodegradation treatments for wastewater. |
| Starting Page | 1652 |
| Ending Page | 1658 |
| Page Count | 7 |
| File Format | |
| ISSN | 09441344 |
| Journal | Environmental Science and Pollution Research |
| Volume Number | 19 |
| Issue Number | 5 |
| e-ISSN | 16147499 |
| Language | English |
| Publisher | Springer-Verlag |
| Publisher Date | 2011-12-08 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Azo dye Titanium dioxide (TiO$_{2}$) Photodegradation Mineralization Particle size Waste Water Technology Water Pollution Control Water Management Aquatic Pollution Environment Industrial Pollution Prevention Atmospheric Protection/Air Quality Control/Air Pollution |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Health, Toxicology and Mutagenesis Pollution Medicine |
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