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Kinetic insights on wet peroxide oxidation of caffeine using EDTA-functionalized low-cost catalysts prepared from compost generated in municipal solid waste treatment facilities
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Advisor(s)
Abstract(s)
Nowadays, sorted organic fraction of municipal solid waste is typically treated by
anaerobic digestion processes, resulting therein a solid stream, further processed to
obtain compost, whose production is higher than the existing demand as fertilizer.
The current work proposes an alternative strategy for the recovering of compost
through the production of low-cost catalysts by calcination (1073 K) and sulfuric acid
treatments, followed by sequential functionalization with tetraethyl orthosilicate (TEOS)
and ethylenediamine tetraacetic acid (EDTA). Activity and stability of the catalysts are
assessed in the wet peroxide oxidation of synthetic wastewater effluents contaminated
with caffeine, a model micro-pollutant, achieving its complete removal after 6 h at 353–
383 K and catalyst loads of 0.5–2.5 g L−1. The increase of the catalytic activity of the
materials upon functionalization with TEOS and EDTA is demonstrated and a kinetic
modeling of caffeine degradation and hydrogen peroxide consumption with the best
catalyst is assessed by pseudo-first power-law rate equations.
Description
Keywords
Circular economy Waste valorization Compost Catalytic wet peroxide oxidation Contaminants of emerging concern Micropollutant
Pedagogical Context
Citation
Diaz de Tuesta, Jose Luis; Almeida, Flávio V.M.; Oliveira, Jéssica; Praça, Paulo; Guerreiro, Mário C.; Gomes, Helder (2021). Kinetic insights on wet peroxide oxidation of caffeine using EDTA-functionalized low-cost catalysts prepared from compost generated in municipal solid waste treatment facilities. Environmental Technology & Innovation. ISSN 2352-1864. 24, p. 1-13