Evaluation of municipal waste compost in relation to the environmental retention of heavy metals

Detalhes bibliográficos
Autor(a) principal: Bento, M. Fátima
Data de Publicação: 2023
Outros Autores: Bettencourt, Ana Paula, Geraldo, Dulce, Ramísio, Paulo J., Andrade, Otília Teresa Antunes Rodrigues
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://hdl.handle.net/1822/87620
Resumo: This study investigates the performance of municipal compost as a heavy metals adsorbent 1 for environmental protection systems. The performed assays test the effects of pH (2-9) and contact time (5-250 minutes) on metal retention. To simulate leaching in natural systems, the soluble organic fraction was removed, leading to variations in the surface properties, including a 10% increase of cation exchange capacity (CEC) and 242% increase in the BET specific surface area, accompanied by a small decrease in the surface charge (characterized by a less negative zeta potential values) of the washed municipal compost (WMC). Notably, these variations, which have not been found in previous research, yielded an improved retention of Cu(II) and Zn(II) compared to the raw municipal compost (RMC) attaining 96% for Cu(II) and 97% for Zn(II) at pH ca 6.8-7.2 for a contact time of 120 minutes. The vast availability, cost-effectiveness, and resistance to desorption make municipal compost a viable option, in a circular economy context for mitigating metal pollution in various environmental conditions. It is worth noting that this study can serve as a proxy for the expected outcomes in long-term exposure to environmental protection systems, enhancing the practical relevance of using compost for metal retention purposes.
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spelling Evaluation of municipal waste compost in relation to the environmental retention of heavy metalsHeavy metalsMunicipal compostAdsorptionIsothermWaste recoveryCircular economyThis study investigates the performance of municipal compost as a heavy metals adsorbent 1 for environmental protection systems. The performed assays test the effects of pH (2-9) and contact time (5-250 minutes) on metal retention. To simulate leaching in natural systems, the soluble organic fraction was removed, leading to variations in the surface properties, including a 10% increase of cation exchange capacity (CEC) and 242% increase in the BET specific surface area, accompanied by a small decrease in the surface charge (characterized by a less negative zeta potential values) of the washed municipal compost (WMC). Notably, these variations, which have not been found in previous research, yielded an improved retention of Cu(II) and Zn(II) compared to the raw municipal compost (RMC) attaining 96% for Cu(II) and 97% for Zn(II) at pH ca 6.8-7.2 for a contact time of 120 minutes. The vast availability, cost-effectiveness, and resistance to desorption make municipal compost a viable option, in a circular economy context for mitigating metal pollution in various environmental conditions. It is worth noting that this study can serve as a proxy for the expected outcomes in long-term exposure to environmental protection systems, enhancing the practical relevance of using compost for metal retention purposes.This work was financially supported by the Interreg VA Spain-Portugal Programme (EU) through the project Res2ValHum (0366_RES2VALHUM_1_P). Thanks are due to Fundação para a Ciência e Tenologia (FCT) and FEDER (European Fund for Regional Development)-COMPETE- QRENEU for financial support through the Chemistry Research Centre of the University of Minho (UID/QUI/00686/2020). This paper was also financed by National Funds of the FCT – Portuguese Foundation for Science and Technology within the project UID/ECO/03182/2019MDPIUniversidade do MinhoBento, M. FátimaBettencourt, Ana PaulaGeraldo, DulceRamísio, Paulo J.Andrade, Otília Teresa Antunes Rodrigues2023-11-282023-11-28T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/87620eng2071-1050https://doi.org/10.3390/su152316395https://www.mdpi.com/2071-1050/15/23/16395info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-12-23T01:39:55Zoai:repositorium.sdum.uminho.pt:1822/87620Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:55:37.360400Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Evaluation of municipal waste compost in relation to the environmental retention of heavy metals
title Evaluation of municipal waste compost in relation to the environmental retention of heavy metals
spellingShingle Evaluation of municipal waste compost in relation to the environmental retention of heavy metals
Bento, M. Fátima
Heavy metals
Municipal compost
Adsorption
Isotherm
Waste recovery
Circular economy
title_short Evaluation of municipal waste compost in relation to the environmental retention of heavy metals
title_full Evaluation of municipal waste compost in relation to the environmental retention of heavy metals
title_fullStr Evaluation of municipal waste compost in relation to the environmental retention of heavy metals
title_full_unstemmed Evaluation of municipal waste compost in relation to the environmental retention of heavy metals
title_sort Evaluation of municipal waste compost in relation to the environmental retention of heavy metals
author Bento, M. Fátima
author_facet Bento, M. Fátima
Bettencourt, Ana Paula
Geraldo, Dulce
Ramísio, Paulo J.
Andrade, Otília Teresa Antunes Rodrigues
author_role author
author2 Bettencourt, Ana Paula
Geraldo, Dulce
Ramísio, Paulo J.
Andrade, Otília Teresa Antunes Rodrigues
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Bento, M. Fátima
Bettencourt, Ana Paula
Geraldo, Dulce
Ramísio, Paulo J.
Andrade, Otília Teresa Antunes Rodrigues
dc.subject.por.fl_str_mv Heavy metals
Municipal compost
Adsorption
Isotherm
Waste recovery
Circular economy
topic Heavy metals
Municipal compost
Adsorption
Isotherm
Waste recovery
Circular economy
description This study investigates the performance of municipal compost as a heavy metals adsorbent 1 for environmental protection systems. The performed assays test the effects of pH (2-9) and contact time (5-250 minutes) on metal retention. To simulate leaching in natural systems, the soluble organic fraction was removed, leading to variations in the surface properties, including a 10% increase of cation exchange capacity (CEC) and 242% increase in the BET specific surface area, accompanied by a small decrease in the surface charge (characterized by a less negative zeta potential values) of the washed municipal compost (WMC). Notably, these variations, which have not been found in previous research, yielded an improved retention of Cu(II) and Zn(II) compared to the raw municipal compost (RMC) attaining 96% for Cu(II) and 97% for Zn(II) at pH ca 6.8-7.2 for a contact time of 120 minutes. The vast availability, cost-effectiveness, and resistance to desorption make municipal compost a viable option, in a circular economy context for mitigating metal pollution in various environmental conditions. It is worth noting that this study can serve as a proxy for the expected outcomes in long-term exposure to environmental protection systems, enhancing the practical relevance of using compost for metal retention purposes.
publishDate 2023
dc.date.none.fl_str_mv 2023-11-28
2023-11-28T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://hdl.handle.net/1822/87620
url https://hdl.handle.net/1822/87620
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 2071-1050
https://doi.org/10.3390/su152316395
https://www.mdpi.com/2071-1050/15/23/16395
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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dc.publisher.none.fl_str_mv MDPI
publisher.none.fl_str_mv MDPI
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
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instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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