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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/66595

    Título
    Efficient recovery and characterization of humic acids from municipal and manure composts: A comparative study
    Autor
    Fernández Delgado, MarinaAutoridad UVA Orcid
    López Linares, Juan CarlosAutoridad UVA Orcid
    Lucas Yagüe, SusanaAutoridad UVA Orcid
    García Cubero, María TeresaAutoridad UVA Orcid
    Coca Sanz, MónicaAutoridad UVA Orcid
    Año del Documento
    2023
    Editorial
    Elsevier
    Descripción
    Producción Científica
    Documento Fuente
    Waste Management 172 (2023) 245–255
    Zusammenfassung
    The recovery of humic acids from low-quality compost obtained in municipal solid waste treatment plants provides opportunities for its valorization. This study compares the recovery and properties of the humic acids obtained from municipal mixed waste compost (MMWC) and manure compost. The effects of temperature, time, and KOH concentration on the ratio of humic acids in the extracted liquid and the content of organic carbon of the precipitates were investigated by response surface methodology. Optimal conditions were 30°C and 24 h for both composts, with a KOH concentration of 0.53 M for MMWC and 0.25 M for manure compost. The manure compost provided a liquid extract richer in humic acids than MMWC (76.6% vs. 33.7%), but the precipitates presented similar organic carbon contents (38.1% vs. 42.4%). Regarding composition, both humic acids presented higher organic carbon and nitrogen contents than the composts used as feedstock. The extraction and further precipitation of humic acids reduced the concentration of heavy metals. Humic acids from manure compost have a slightly higher average molecular weight (2650 Da) than those from MMWC (1980 Da), while both present similar C/N ratios and degree of aromaticity. Most contaminants of emerging concern present in the original composts were not detected in the humic acids. Thus, it was demonstrated that MMWC constitutes an attractive source of humic acids with properties similar to those obtained from a high-quality compost and, therefore, with potential economic value.
    Palabras Clave
    Humic acids
    Manure compost
    Municipal mixed waste compost
    Alkaline extraction
    contaminants of emerging concern
    UHPLC-MS-QTOF
    ISSN
    0956-053X
    Revisión por pares
    SI
    DOI
    10.1016/j.wasman.2023.10.025
    Patrocinador
    Programme of Cooperation INTERREG V-A Spain-Portugal (POCTEP) 2014-2020. European Regional Development Fund (EU-FEDER) (Project 0765_VALUECOMP_2_P).
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/66595
    Tipo de versión
    info:eu-repo/semantics/submittedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • DEP48 - Artículos de revista [267]
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    Dateien zu dieser Ressource
    Nombre:
    WM-23-1686_R2.pdf
    Tamaño:
    1.532Mb
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    Universidad de Valladolid

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