Paracetamol degradation pathways in soil after biochar addition

Autor: Francisco J. Chacón, Maria L. Cayuela, Miguel A. Sánchez-Monedero
Přispěvatelé: Ministerio de Economía y Competitividad (España), Ministerio de Ciencia, Innovación y Universidades (España), European Commission, Agencia Estatal de Investigación (España)
Rok vydání: 2022
Předmět:
Zdroj: Digital.CSIC. Repositorio Institucional del CSIC
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ISSN: 1873-6424
Popis: Little is known about the effect of biochar on the degradation of paracetamol in soil, considering the ubiquity of this pollutant in the environment. Given the importance of the electrochemical properties of biochar for contaminant remediation, we investigated the influence of raw and designer redox-active biochars on paracetamol degradation in soil. Metabolite quantification indicated that a minimum of 53% of the spiked paracetamol was transformed in biochar-amended soil, resulting in the accumulation of different degradation products. The identification of these products allowed us to chart paracetamol degradation pathways in soil with and without biochar amendment. Some of the major degradation routes were observed to proceed via catechol and phenol, despite being previously described as having only a minor role in paracetamol metabolism. Additionally, a new transformation route from paracetamol to NAPQI was discovered in anaerobic soil originating from direct redox reactions on the surface of the designer biochars. These results may contribute to change our understanding of the environmental fate of paracetamol in soil and the role of biochar in its biodegradation.
Financial support from the Spanish Ministry of Economy and Competitiveness (Projects Nº CTM 2015-67200-R) and Spanish Ministry of Science, Innovation and Universities cofunded with EU FEDER funds (Nº RTI 2018-099417-B-I00) is greatly appreciated
Databáze: OpenAIRE
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