Pollutant emissions during pyrolysis and combustion of waste printed circuit boards, before and after metal removal

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Títol: Pollutant emissions during pyrolysis and combustion of waste printed circuit boards, before and after metal removal
Autors: Ortuño García, Nuria | Conesa, Juan A. | Moltó Berenguer, Julia | Font, Rafael
Grups d'investigació o GITE: Residuos, Pirólisis y Combustión
Centre, Departament o Servei: Universidad de Alicante. Departamento de Ingeniería Química | Universidad de Alicante. Instituto Universitario de Ingeniería de los Procesos Químicos
Paraules clau: Printed circuit board | WEEE | Pyrolysis | Combustion | Dioxin
Àrees de coneixement: Ingeniería Química
Data de publicació: 15-de novembre-2014
Editor: Elsevier
Citació bibliogràfica: Science of The Total Environment. 2014, 499: 27-35. doi:10.1016/j.scitotenv.2014.08.039
Resum: The constant increase in the production of electronic devices implies the need for an appropriate management of a growing number of waste electrical and electronic equipment. Thermal treatments represent an interesting alternative to recycle this kind of waste, but particular attention has to be paid to the potential emissions of toxic by-products. In this study, the emissions from thermal degradation of printed circuit boards (with and without metals) have been studied using a laboratory scale reactor, under oxidizing and inert atmosphere at 600 and 850 °C. Apart from carbon oxides, HBr was the main decomposition product, followed by high amounts of methane, ethylene, propylene, phenol and benzene. The maximum formation of PAHs was found in pyrolysis at 850 °C, naphthalene being the most abundant. High levels of 2-, 4-, 2,4-, 2,6- and 2,4,6-bromophenols were found, especially at 600 °C. Emissions of PCDD/Fs and dioxin-like PCBs were quite low and much lower than that of PBDD/Fs, due to the higher bromine content of the samples. Combustion at 600 °C was the run with the highest PBDD/F formation: the total content of eleven 2,3,7,8-substituted congeners (tetra- through heptaBDD/Fs) was 7240 and 3250 ng WHO2005-TEQ/kg sample, corresponding to the sample with and without metals, respectively.
Patrocinadors: Support for this work was provided by the CTQ2013-41006 project from the Ministry of Education and Science (Spain) and the PROMETEO/2009/043/FEDER project from the Valencian Community Government (Spain).
URI: http://hdl.handle.net/10045/44587
ISSN: 0048-9697 (Print) | 1879-1026 (Internet)
DOI: 10.1016/j.scitotenv.2014.08.039
Idioma: eng
Tipus: info:eu-repo/semantics/article
Drets: © 2014 Elsevier B.V.
Revisió científica: si
Versió de l'editor: http://dx.doi.org/10.1016/j.scitotenv.2014.08.039
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