Heterogeneous electro-Fenton as plausible technology for the degradation of imidazolinium-based ionic liquids
| Autor: | Marta Pazos, Ma Ángeles Sanromán, Elisa González-Romero, Emilio Rosales, María Arellano, Verónica Poza-Nogueiras |
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| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
Iron Health Toxicology and Mutagenesis Ionic Liquids chemistry.chemical_element 3308 Ingeniería y Tecnología del Medio Ambiente 02 engineering and technology 010501 environmental sciences Heterogeneous catalysis 01 natural sciences Chloride Catalysis Water Purification chemistry.chemical_compound medicine Environmental Chemistry Imidazolines Electrodes 0105 earth and related environmental sciences Pollutant Public Health Environmental and Occupational Health Electrochemical Techniques Hydrogen Peroxide General Medicine General Chemistry 021001 nanoscience & nanotechnology Pollution 3303 Ingeniería y Tecnología Químicas chemistry Chemical engineering Ionic liquid Degradation (geology) Differential pulse voltammetry 0210 nano-technology Oxidation-Reduction Carbon Water Pollutants Chemical medicine.drug |
| Zdroj: | Investigo. Repositorio Institucional de la Universidade de Vigo Universidade de Vigo (UVigo) |
| Popis: | Conventional water treatments are generally inadequate for degradation of emerging pollutants such as ionic liquids (ILs). The use of heterogeneous electro-Fenton (HEF) has attracted great interest, due to its ability to efficiently oxidize a wide range of organic pollutants operating in cycles or in continuous mode. In this study, the removal of a complex IL from the imidazolinium family (1,3-Bis(2,4,6-trimethylphenyl)imidazolinium chloride), by means of HEF using iron alginate spheres as catalyst has been investigated, resulting in significant TOC decay after 6 h. The optimization of the key process parameters (current, IL concentration and catalyst dosage) has been performed using a Box-Behnken experimental design and achieving 76.98% of TOC abatement in 2 h of treatment. Current proved to be a crucial parameter and high catalyst dosage is required to achieve the maximum removal. In addition, an insight about the availability of iron into the reactor and the evolution of several intermediates has been carried out by employing differential pulse voltammetry on screen-printed carbon electrodes. The evolution of the different voltammetric peaks confirmed the influence of iron release, and the generation of several iron complexes has permitted the comprehension of the degradation pathway, which has been validated by chromatographic techniques. Ministerio de Economía y Competitividad (España) | Ref. CTM2014-52471-R |
| Databáze: | OpenAIRE |
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