Photoelectro-Fenton mineralization of phenol through optimization of ferrous regeneration
| Autor: | Hsiao Ting Su, Yao Hui Huang, Yu Jen Shih |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Light
Iron Health Toxicology and Mutagenesis Inorganic chemistry Electrochemistry Oxalate Water Purification Ferrous chemistry.chemical_compound medicine Environmental Chemistry Phenol Carboxylate Hydrogen peroxide Electrochemical Techniques Hydrogen Peroxide General Medicine Hydrogen-Ion Concentration Pollution chemistry Reagent Ferric Oxidation-Reduction Water Pollutants Chemical medicine.drug |
| Zdroj: | Environmental Science and Pollution Research. 20:6184-6190 |
| ISSN: | 1614-7499 0944-1344 |
| DOI: | 10.1007/s11356-013-1669-y |
| Popis: | The degradation of phenol in acidic solution at pH 3 has been investigated under various photo- and electrochemical conditions. A laboratory-scale reactor on which were mounted net electrodes (RuO2/IrO2-coated Ti anodes (DSA) and stainless steel cathodes) and 254 nm UV lamps was established to effectively reduce ferric reagents. The experimental results of the photoelectron-chemical reaction suggested that the current efficiency of reducing ferric ion was improved by increasing the number of electrodes used, and the UV lamps were important to inducing the reduction of ferric carboxylates, which were the major intermediates that were formed upon a particular degree of phenol oxidation. Accordingly, the addition of an initial concentration of 400 ppm ferrous salt and 10,200 ppm hydrogen peroxide (in a continuous mode) resulted in the removal of over 92 % of TOC (initial phenol = 2,000 ppm, TOC = 1,532 ppm) by 4 h of the photoelectro-Fenton and the sequential 2 h of the photo-Fenton processes. HPLC was utilized to monitor the formation of aromatic and carboxylate byproducts, and revealed that the aid of photo irradiation eliminated most of the oxalate residue from the final solution, which would have contributed to the 25 % of the TOC that was inactive in the electrolytic system. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink