Coupled electrochemical processes for removing dye from soil and water
| Autor: | Elaine Cristina M. de Moura Santos, Elisama Vieira dos Santos, Carlos A. Martínez-Huitle, Suelya S.M. Paiva, Iasmin Bezerra Da Silva, Ingrid Medeiros Veras Rocha |
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| Přispěvatelé: | Federal University of Rio Grande do Norte, Universidade Estadual Paulista (Unesp) |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Environmental remediation
Supporting electrolyte 02 engineering and technology 010501 environmental sciences Electrochemistry 01 natural sciences Organic compound chemistry.chemical_compound Soil Removing Dye Sodium sulfate Materials Chemistry Organic matter 0105 earth and related environmental sciences chemistry.chemical_classification Electrokinetic remediation Coupled Electrochemical Renewable Energy Sustainability and the Environment Water 021001 nanoscience & nanotechnology Condensed Matter Physics Persulfate Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry 0210 nano-technology Nuclear chemistry |
| Zdroj: | Repositório Institucional da UFRN Universidade Federal do Rio Grande do Norte (UFRN) instacron:UFRN Scopus Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2018-12-11T16:54:08Z (GMT). No. of bitstreams: 0 Previous issue date: 2018-01-01 Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) In this work, a coupled remediation approach is studied by using electrochemical technologies (electrokinetic remediation (ER) and after that, BDD-electrolysis) to remove an azo dye from soil and after that, the elimination of dye from generated effluents was also attained. ER experiments were carried out using graphite electrodes, by applying 1 V cm−1 for 14 d, investigating the use of solutions containing with 0.05 M of Na2SO4 and 0.05 M of sodium dodecyl sulfate (SDS) in the anodic and cathodic reservoirs, respectively. The results clearly indicated that SDS favors the elimination of organic pollutant from the soil, achieving 65%. However, the removal efficiency is increased (89%) when sodium sulfate solution was used as supporting electrolyte. The transport of organic compound in the soil from the cathode to anode reservoir was due to the electromigration phenomenon. Toxicity tests were performed to evaluate the reuse of the soil after remediation, then, the germination of sunflower seeds was carried out, achieving significant percentage of germination in central soil positions (65% and 92%). Finally, the effluent generated by ER was treated with BDD-electrolysis, obtaining complete discoloration after 80 min and a quasi-complete elimination of organic matter (more than 95%) after 120 min due to the contribution of persulfate (S2O8 2−) electrochemically generated at BDD anode. School of Science and Technology Federal University of Rio Grande do Norte Institute of Chemistry Federal University of Rio Grande do Norte Unesp National Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Institute of Chemistry Unesp National Institute for Alternative Technologies of Detection Toxicological Evaluation and Removal of Micropollutants and Radioactives (INCT-DATREM) Institute of Chemistry CNPq: 2014/50945-4 CNPq: 430121/2016-4 CNPq: 446846/2014-7 |
| Databáze: | OpenAIRE |
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