New Route for Valorization of Oil Mill Wastes: Isolation of Humic-Like Substances to be Employed in Solar-Driven Processes for Pollutants Removal
| Autor: | Silvia Berto, Ana M. Amat, Marco Minella, Jaume Grimalt, R. Vicente, Sara García-Ballesteros, Enzo Laurenti, Antonio Arques, María Fernanda López-Pérez, Alessandra Bianco Prevot |
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| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Thermogravimetric analysis
General Chemical Engineering Radical Size-exclusion chromatography Ultrafiltration 02 engineering and technology 010501 environmental sciences 01 natural sciences wastes valorization Humic-Like Substances olive oil photo-Fenton wastewater treatment Article INGENIERIA QUIMICA lcsh:Chemistry chemistry.chemical_compound photo-Fenton 0105 earth and related environmental sciences Pollutant Chemistry Singlet oxygen Humic-Like Substances wastes valorization General Chemistry 021001 nanoscience & nanotechnology Pulp and paper industry olive oil wastewater treatment lcsh:QD1-999 13. Climate action Degradation (geology) Sewage treatment 0210 nano-technology QUIMICA FISICA |
| Zdroj: | ACS Omega, Vol 3, Iss 10, Pp 13073-13080 (2018) ACS Omega RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| Popis: | [EN] The valorization of olive oil mill solid wastes (OMW) has been addressed by considering it as a possible source of humic-like substances (HLSs), to be used as auxiliary substances for photo-Fenton, employing caffeine as a target pollutant to test the efficiency of this approach. The OMW-HLS isolation encompassed the OMW basic hydrolysis, followed by ultrafiltration and drying. OMW-HLS structural features have been investigated by means of laser light scattering, fluorescence, size exclusion chromatography, and thermogravimetric analysis; moreover, the capability of OMW-HLS to generate reactive species under irradiation has been investigated using spin-trap electronic paramagnetic resonance. The caffeine degradation by means of photo-Fenton process driven at pH = 5 was significantly increased by the addition of 10 mg/L of OMW-HLS. Under the mechanistic point of view, it could be hypothesized that singlet oxygen is not playing a relevant role, whereas other oxidants (mainly OH center dot radicals) can be considered as the key species in promoting caffeine degradation. Authors want to acknowledge the financial support of Spanish Ministerio de Economia y Competitividad (CTQ2015-69832-C04) and European Union (645551-RISE-2014, MAT4-TREAT). |
| Databáze: | OpenAIRE |
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