Electro-Fenton process for implementation of acid black liquor waste treatment
| Autor: | Emilio Rosales, Gabriel Buftia, María Ángeles Sanromán, Marta Pazos, Gabriel Lazar |
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| Rok vydání: | 2018 |
| Předmět: |
Paper
Environmental Engineering Environmental remediation Iron Industrial Waste 02 engineering and technology Wastewater 010501 environmental sciences Lignin Waste Disposal Fluid 01 natural sciences Catalysis Water Purification chemistry.chemical_compound Environmental Chemistry Response surface methodology Waste Management and Disposal 0105 earth and related environmental sciences Biological Oxygen Demand Analysis Waste Products business.industry Paper mill Electrochemical Techniques Hydrogen Peroxide 021001 nanoscience & nanotechnology Pulp and paper industry Pollution Waste treatment chemistry Environmental science Degradation (geology) 0210 nano-technology business Oxidation-Reduction Water Pollutants Chemical Black liquor |
| Zdroj: | Science of The Total Environment. 635:397-404 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2018.04.139 |
| Popis: | In this work, an eco-friendly solution for the remediation of wastewater generated in the lignin recovery process from eco-industrial paper mill has been proposed in their way towards a more circular economy strategy. Thus, the application of the electro-Fenton process for the degradation of the non-recovered lignin and other organic compounds form a scarcely studied acid black liquor waste (ABLW) was successfully performed. This treatment was able to operate in a range of COD loads (0.5–19.5 mg O2·L–1) showing high degradation values of the ABLW determined by the abatement of color, total phenolic content and COD. Then, the optimization of the working conditions for the design of a sustainable treatment system with optimum efficiency was carried out using a response surface methodology. The experiment carried out in the calculated optimal conditions for the electro-Fenton degradation process (current intensity 132.5 mA, catalyst dosage of 0.10 mM, and temperature 40 °C) showed a COD removal of 74.82% and current efficiency 77.79%, close to the theoretical value predicted by the model 73.12% and 77.06%, respectively. In addition, the identification of the final products permitted to confirm the mineralization efficiency. |
| Databáze: | OpenAIRE |
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