Textile wastewater reuse after additional treatment by Fenton's reagent
| Autor: | Maria Clara V.M. Starling, Marília Cleto Meirelles Ribeiro, Mônica Maria Diniz Leão, Camila C. Amorim |
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| Rok vydání: | 2016 |
| Předmět: |
inorganic chemicals
Health Toxicology and Mutagenesis Iron Ultrafiltration Industrial Waste 02 engineering and technology 010501 environmental sciences Reuse 01 natural sciences Water Purification chemistry.chemical_compound Environmental Chemistry Organic matter 0105 earth and related environmental sciences chemistry.chemical_classification Waste management Sewage Textiles General Medicine Factorial experiment Hydrogen Peroxide 021001 nanoscience & nanotechnology Pollution Activated sludge Wastewater chemistry Reagent Environmental science 0210 nano-technology Fenton's reagent |
| Zdroj: | Environmental science and pollution research international. 24(7) |
| ISSN: | 1614-7499 |
| Popis: | This study verifies textile wastewater reuse treated by the conventional activated sludge process and subjected to further treatment by advanced oxidation processes. Three alternative processes are discussed: Fenton, photo-Fenton, and UV/H2O2. Evaluation of treatments effects was based on factorial experiment design in which the response variables were the maximum removal of COD and the minimum concentration of residual H2O2 in treated wastewater. Results indicated Fenton's reagent, COD/[H2O2]/[Fe2+] mass ratio of 1:2:2, as the best alternative. The selected technique was applied to real wastewater collected from a conventional treatment plant of a textile mill. The quality of the wastewater before and after the additional treatment was monitored in terms of 16 physicochemical parameters defined as suitable for the characterization of waters subjected to industrial textile use. The degradation of the wastewater was also evaluated by determining the distribution of its molecular weight along with the organic matter fractionation by ultrafiltration, measured in terms of COD. Finally, a sample of the wastewater after additional treatment was tested for reuse at pilot scale in order to evaluate the impact on the quality of dyed fabrics. Results show partial compliance of treated wastewater with the physicochemical quality guidelines for reuse. Removal and conversion of high and medium molecular weight substances into low molecular weight substances was observed, as well as the degradation of most of the organic matter originally present in the wastewater. Reuse tests indicated positive results, confirming the applicability of wastewater reuse after the suggested additional treatment. Graphical abstract Textile wastewater samples after additional treatment by Fenton's reagent, photo-Fenton and H2O2/UV tested in different conditions. |
| Databáze: | OpenAIRE |
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