PCDD/F formation from chlorophenols by lignin and manganese peroxidases

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Title: PCDD/F formation from chlorophenols by lignin and manganese peroxidases
Authors: Muñoz Fernández, María | Gómez-Rico, María Francisca | Font, Rafael
Research Group/s: Residuos, Energía, Medio Ambiente y Nanotecnología (REMAN)
Center, Department or Service: Universidad de Alicante. Departamento de Ingeniería Química | Universidad de Alicante. Instituto Universitario de Ingeniería de los Procesos Químicos
Keywords: Compost | Sewage sludge | Manganese peroxidase | Lignin peroxidase | Enzyme | PCDD/F
Knowledge Area: Ingeniería Química
Issue Date: Sep-2014
Publisher: Elsevier
Citation: Chemosphere. 2014, 110: 129-135. doi:10.1016/j.chemosphere.2014.02.029
Abstract: Polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/F) formation was studied, in vitro, with two different chlorophenol mixtures (group “di+tri” 2,4-dichlorophenol; 2,3,4-, 2,3,5-, and 3,4,5-trichlorophenols and group “tri+tetra+penta” with 2,4,5-trichlorophenol, 2,3,4,6-tetrachlorophenol and pentachlorophenol) and two different lignolytic enzymes, lignin and manganese peroxidase (LiP and MnP respectively), which can be found during the composting process of sewage sludge. The concentrations of PCDD/F in final samples are compared to the PCDD/F content of the control samples containing the chlorophenols. High increases were observed for experiments with MnP and phosphate buffer. Experiments that contained tri-, tetra- and pentachlorophenol with MnP resulted in more than 8 · 108 ng of OCDD kg−1 chlorophenol which was much higher than the initial amount (1 · 107 ng OCDD kg−1 chlorophenol). In relation to LiP experiments, only those at 37 °C showed a moderate increase (from 1.3 · 107 to 2.6 · 107 ng of OCDD kg−1 chlorophenol). The results agree with the literature in which high amounts of HpCDD and OCDD were found after a composting process and could explain the biogenic formation suggested by others, but the incidence on the total toxicity is less than that expected.
Sponsor: The authors want to thank the University of Alicante for their economic support to perform this research and the project CTQ 2008-05520 of the Spanish Ministry of Science and Innovation, Prometeo 2009/043/FEDER of the Valencian Community of Spain.
URI: http://hdl.handle.net/10045/47978
ISSN: 0045-6535 (Print) | 1879-1298 (Online)
DOI: 10.1016/j.chemosphere.2014.02.029
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2014 Elsevier Ltd.
Peer Review: si
Publisher version: http://dx.doi.org/10.1016/j.chemosphere.2014.02.029
Appears in Collections:INV - REMAN - Artículos de Revistas

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