Importance of pyrolysis temperature and pressure in the concentration of polycyclic aromatic hydrocarbons in wood waste-derived biochars

Biochar addition to soil can lead to potential environmental risks due to its content of polycyclic aromatic hydrocarbons (PAHs). Until now, previous research focused on assessing the influence of pyrolysis peak temperature and feedstock on the formation and evolution of PAHs. Nevertheless, the effe...

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Autores: Greco, Gianluca, Videgain, María, Di Stasi, Christian, Pires, Elisabet, Manyà, Joan J.
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2021
País:España
Institución:Universidad de Zaragoza
Repositorio:Zaguán. Repositorio Digital de la Universidad de Zaragoza
OAI Identifier:oai:zaguan.unizar.es:108363
Acceso en línea:http://zaguan.unizar.es/record/108363
Access Level:acceso abierto
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spelling Importance of pyrolysis temperature and pressure in the concentration of polycyclic aromatic hydrocarbons in wood waste-derived biocharsGreco, GianlucaVidegain, MaríaDi Stasi, ChristianPires, ElisabetManyà, Joan J.Biochar addition to soil can lead to potential environmental risks due to its content of polycyclic aromatic hydrocarbons (PAHs). Until now, previous research focused on assessing the influence of pyrolysis peak temperature and feedstock on the formation and evolution of PAHs. Nevertheless, the effects of other important process parameters —such as pressure, gas residence time, and type of carrier gas— have not been comprehensively explored. To fill this gap, a 2-level full factorial design of experiments was conducted to assess the influence of the above-mentioned parameters on the pyrolysis behavior of an untreated wood waste as well as the properties of resulting biochars, including their PAHs contents. Results showed that the highest production of PAHs was reached at lower peak temperatures, whereas an increase in temperature led to a substantial reduction of the final PAHs content. An increased pressure also resulted in a marked decrease in PAHs, probably as a consequence of the higher carrier gas flow rates used under pressurized conditions, which could inhibit the generation of PAHs by condensation and polymerization. The outstanding results obtained from the phytotoxicity assessment for three plant species (barley, watercress, and basil) suggest that PAHs were not the major responsible for the observed short-term phytotoxic effects of biochars, since a considerable part of the phytotoxic compounds in biochar can be removed by a simple water washing step.2021info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://zaguan.unizar.es/record/108363reponame:Zaguán. Repositorio Digital de la Universidad de Zaragozainstname:Universidad de ZaragozaInglésinfo:eu-repo/grantAgreement/ES/DGA-ERDF/E37-20Rinfo:eu-repo/grantAgreement/ES/DGA-FEDER/T22-20Rinfo:eu-repo/grantAgreement/EC/H2020/721991This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 721991- GreenCarboninfo:eu-repo/grantAgreement/ES/MCIU/RTI2018-093431-B-I00info:eu-repo/semantics/openAccessoai:zaguan.unizar.es:1083632026-05-29T13:59:51Z
dc.title.none.fl_str_mv Importance of pyrolysis temperature and pressure in the concentration of polycyclic aromatic hydrocarbons in wood waste-derived biochars
title Importance of pyrolysis temperature and pressure in the concentration of polycyclic aromatic hydrocarbons in wood waste-derived biochars
spellingShingle Importance of pyrolysis temperature and pressure in the concentration of polycyclic aromatic hydrocarbons in wood waste-derived biochars
Greco, Gianluca
title_short Importance of pyrolysis temperature and pressure in the concentration of polycyclic aromatic hydrocarbons in wood waste-derived biochars
title_full Importance of pyrolysis temperature and pressure in the concentration of polycyclic aromatic hydrocarbons in wood waste-derived biochars
title_fullStr Importance of pyrolysis temperature and pressure in the concentration of polycyclic aromatic hydrocarbons in wood waste-derived biochars
title_full_unstemmed Importance of pyrolysis temperature and pressure in the concentration of polycyclic aromatic hydrocarbons in wood waste-derived biochars
title_sort Importance of pyrolysis temperature and pressure in the concentration of polycyclic aromatic hydrocarbons in wood waste-derived biochars
dc.creator.none.fl_str_mv Greco, Gianluca
Videgain, María
Di Stasi, Christian
Pires, Elisabet
Manyà, Joan J.
author Greco, Gianluca
author_facet Greco, Gianluca
Videgain, María
Di Stasi, Christian
Pires, Elisabet
Manyà, Joan J.
author_role author
author2 Videgain, María
Di Stasi, Christian
Pires, Elisabet
Manyà, Joan J.
author2_role author
author
author
author
description Biochar addition to soil can lead to potential environmental risks due to its content of polycyclic aromatic hydrocarbons (PAHs). Until now, previous research focused on assessing the influence of pyrolysis peak temperature and feedstock on the formation and evolution of PAHs. Nevertheless, the effects of other important process parameters —such as pressure, gas residence time, and type of carrier gas— have not been comprehensively explored. To fill this gap, a 2-level full factorial design of experiments was conducted to assess the influence of the above-mentioned parameters on the pyrolysis behavior of an untreated wood waste as well as the properties of resulting biochars, including their PAHs contents. Results showed that the highest production of PAHs was reached at lower peak temperatures, whereas an increase in temperature led to a substantial reduction of the final PAHs content. An increased pressure also resulted in a marked decrease in PAHs, probably as a consequence of the higher carrier gas flow rates used under pressurized conditions, which could inhibit the generation of PAHs by condensation and polymerization. The outstanding results obtained from the phytotoxicity assessment for three plant species (barley, watercress, and basil) suggest that PAHs were not the major responsible for the observed short-term phytotoxic effects of biochars, since a considerable part of the phytotoxic compounds in biochar can be removed by a simple water washing step.
publishDate 2021
dc.date.none.fl_str_mv 2021
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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dc.identifier.none.fl_str_mv http://zaguan.unizar.es/record/108363
url http://zaguan.unizar.es/record/108363
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/ES/DGA-ERDF/E37-20R
info:eu-repo/grantAgreement/ES/DGA-FEDER/T22-20R
info:eu-repo/grantAgreement/EC/H2020/721991
This project has received funding from the European Union’s Horizon 2020 research and innovation program under grant agreement No H2020 721991- GreenCarbon
info:eu-repo/grantAgreement/ES/MCIU/RTI2018-093431-B-I00
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv
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dc.source.none.fl_str_mv reponame:Zaguán. Repositorio Digital de la Universidad de Zaragoza
instname:Universidad de Zaragoza
instname_str Universidad de Zaragoza
reponame_str Zaguán. Repositorio Digital de la Universidad de Zaragoza
collection Zaguán. Repositorio Digital de la Universidad de Zaragoza
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