Performance of nano- and nonnano-catalytic electrodes for decontaminating municipal wastewater
| Autor: | Jih-Hsing Chang, Cheng-Hung Tung, Tsong-Jen Yang |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Environmental Engineering
Health Toxicology and Mutagenesis Inorganic chemistry Conductivity Electrocatalyst Waste Disposal Fluid Catalysis Water Purification chemistry.chemical_compound Environmental Chemistry City Planning Waste Management and Disposal Electrodes Titanium Chemistry Chemical oxygen demand Hydrogen-Ion Concentration Pollution Anode Nanostructures Oxygen Wastewater Electrode Titanium dioxide Microscopy Electron Scanning Sewage treatment Water Pollutants Chemical |
| Zdroj: | Journal of hazardous materials. 163(1) |
| ISSN: | 0304-3894 |
| Popis: | This research is intended to decompose organic substances in municipal wastewater with nano- and nonnano-scale electrocatalytic electrodes. As an anode, the nano-scale electrodes included lab-made TiO 2 and Cu 2 O electrodes; the nonnano-scale electrodes were a commercial TiO 2 and graphite plate. According to experimental results, the nano- and nonnano-scale catalytic electrodes can effectively remove the organic pollutants in the municipal wastewater. The perforated TiO 2 electrode is the best for eliminating the chemical oxygen demand (COD), and its efficiency is about 90% (COD decreases from 400 to 40 mg L −1 ). The conductivity of municipal wastewater and the electro-catalytic process will increase the pH and eventually remains in the neutral range. The conductivity of municipal wastewater can be lowered to some degrees. The most attractive discovery of electro-catalytic process is that the dissolved oxygen (DO) in the municipal wastewater can be increased by the TiO 2 electrode (nonnano-scale) around 4–6 mg L −1 , but few DO is produced by the nano-scale electrocatalytic electrode. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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