Changes in the heavy metal solubility of two contaminated soils after heavy metals phytoextraction with Noccaea caerulescens

Hyperacumulator plant species, such as Noccaea caerulescens, have been deeply studied due to their use in phytoextraction techniques, although the fate of the metals remaining in the roots at the end of the remediation process is still uncertain. Here, germination and growth, metal accumulation in p...

ver descrição completa

Detalhes bibliográficos
Autores: Martínez Alcalá, Isabel, Bernal, Pilar, de la Fuente, Carlos, Gondar, Dora, Clemente, Rafael
Tipo de documento: artigo
Data de publicação:2016
País:España
Recursos:Universidad Católica San Antonio de Murcia (UCAM)
Repositório:RIUCAM. Repositorio Institucional de la Universidad Católica San Antonio de Murcia
OAI Identifier:oai:repositorio.ucam.edu:10952/7961
Acesso em linha:http://hdl.handle.net/10952/7961
Access Level:Acceso aberto
Palavra-chave:Hyperaccumulation
Phytoremediation
Rhizosphere
Root degradation
Sequential extraction
id ES_3c9cceca1fe5dba737f46b37c2079662
oai_identifier_str oai:repositorio.ucam.edu:10952/7961
network_acronym_str ES
network_name_str España
repository_id_str
spelling Changes in the heavy metal solubility of two contaminated soils after heavy metals phytoextraction with Noccaea caerulescensMartínez Alcalá, IsabelBernal, Pilarde la Fuente, CarlosGondar, DoraClemente, RafaelHyperaccumulationPhytoremediationRhizosphereRoot degradationSequential extractionHyperacumulator plant species, such as Noccaea caerulescens, have been deeply studied due to their use in phytoextraction techniques, although the fate of the metals remaining in the roots at the end of the remediation process is still uncertain. Here, germination and growth, metal accumulation in plant tissues and degradation of roots remaining in the soil after harvest have been studied in two contaminated soils from an area affected by a toxic pyritic sludge spillage. Specially designed pots allowed the separation of the bulk soil and rhizosphere, where heavy metals fractionation in soil was determined at the end of the growing period. High Cd and, especially, Zn concentrations in the aerial parts of the plants were found, although the bio-concentration factors (BCF) were higher for Cd (13–34) than for Zn (2.37–4.34). For both soils, the soluble and exchangeable (CaCl2-extractable) concentrations of Fe and Mn were higher in the rhizosphere than in the bulk soil, while Zn and Cd concentrations were greater in the bulk soil. After plant harvesting, the degradation of heavy metal enriched roots in the soil was studied as well as the effect of this process on soil metal solubility. The soluble concentrations of Cu and Mn were higher in the soils with roots that in the corresponding soils without roots. Nevertheless, the amount of heavy metals released to the soil after root degradation (8–14% of their organic C was decomposed) was rather low (below 0.1 μg g−1), showing the feasibility of the use of N. caerulescens for phytoextraction.Ciencias Ambientales2016info:eu-repo/semantics/articlehttp://hdl.handle.net/10952/7961reponame:RIUCAM. Repositorio Institucional de la Universidad Católica San Antonio de Murciainstname:Universidad Católica San Antonio de Murcia (UCAM)Inglésinfo:eu-repo/semantics/openAccessoai:repositorio.ucam.edu:10952/79612026-06-07T18:35:21Z
dc.title.none.fl_str_mv Changes in the heavy metal solubility of two contaminated soils after heavy metals phytoextraction with Noccaea caerulescens
title Changes in the heavy metal solubility of two contaminated soils after heavy metals phytoextraction with Noccaea caerulescens
spellingShingle Changes in the heavy metal solubility of two contaminated soils after heavy metals phytoextraction with Noccaea caerulescens
Martínez Alcalá, Isabel
Hyperaccumulation
Phytoremediation
Rhizosphere
Root degradation
Sequential extraction
title_short Changes in the heavy metal solubility of two contaminated soils after heavy metals phytoextraction with Noccaea caerulescens
title_full Changes in the heavy metal solubility of two contaminated soils after heavy metals phytoextraction with Noccaea caerulescens
title_fullStr Changes in the heavy metal solubility of two contaminated soils after heavy metals phytoextraction with Noccaea caerulescens
title_full_unstemmed Changes in the heavy metal solubility of two contaminated soils after heavy metals phytoextraction with Noccaea caerulescens
title_sort Changes in the heavy metal solubility of two contaminated soils after heavy metals phytoextraction with Noccaea caerulescens
dc.creator.none.fl_str_mv Martínez Alcalá, Isabel
Bernal, Pilar
de la Fuente, Carlos
Gondar, Dora
Clemente, Rafael
author Martínez Alcalá, Isabel
author_facet Martínez Alcalá, Isabel
Bernal, Pilar
de la Fuente, Carlos
Gondar, Dora
Clemente, Rafael
author_role author
author2 Bernal, Pilar
de la Fuente, Carlos
Gondar, Dora
Clemente, Rafael
author2_role author
author
author
author
dc.subject.none.fl_str_mv Hyperaccumulation
Phytoremediation
Rhizosphere
Root degradation
Sequential extraction
topic Hyperaccumulation
Phytoremediation
Rhizosphere
Root degradation
Sequential extraction
description Hyperacumulator plant species, such as Noccaea caerulescens, have been deeply studied due to their use in phytoextraction techniques, although the fate of the metals remaining in the roots at the end of the remediation process is still uncertain. Here, germination and growth, metal accumulation in plant tissues and degradation of roots remaining in the soil after harvest have been studied in two contaminated soils from an area affected by a toxic pyritic sludge spillage. Specially designed pots allowed the separation of the bulk soil and rhizosphere, where heavy metals fractionation in soil was determined at the end of the growing period. High Cd and, especially, Zn concentrations in the aerial parts of the plants were found, although the bio-concentration factors (BCF) were higher for Cd (13–34) than for Zn (2.37–4.34). For both soils, the soluble and exchangeable (CaCl2-extractable) concentrations of Fe and Mn were higher in the rhizosphere than in the bulk soil, while Zn and Cd concentrations were greater in the bulk soil. After plant harvesting, the degradation of heavy metal enriched roots in the soil was studied as well as the effect of this process on soil metal solubility. The soluble concentrations of Cu and Mn were higher in the soils with roots that in the corresponding soils without roots. Nevertheless, the amount of heavy metals released to the soil after root degradation (8–14% of their organic C was decomposed) was rather low (below 0.1 μg g−1), showing the feasibility of the use of N. caerulescens for phytoextraction.
publishDate 2016
dc.date.none.fl_str_mv 2016
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10952/7961
url http://hdl.handle.net/10952/7961
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:RIUCAM. Repositorio Institucional de la Universidad Católica San Antonio de Murcia
instname:Universidad Católica San Antonio de Murcia (UCAM)
instname_str Universidad Católica San Antonio de Murcia (UCAM)
reponame_str RIUCAM. Repositorio Institucional de la Universidad Católica San Antonio de Murcia
collection RIUCAM. Repositorio Institucional de la Universidad Católica San Antonio de Murcia
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869406386903842816
score 15,812455

Registros relacionados