Influence of organic matter transformations on the bioavailability of heavy metals

6 páginas, 3 tablas.

Detalles Bibliográficos
Autores: Ingelmo Sánchez, Florencio, Molina, M. J., Soriano, María Desamparados, Gallardo, Antonio
Tipo de recurso: artículo
Fecha de publicación:2012
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/45705
Acceso en línea:http://hdl.handle.net/10261/45705
Access Level:acceso abierto
Palabra clave:Sewage sludge
Composts
Humic substances
Humin
Heavy metals
Bioavailability
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spelling Influence of organic matter transformations on the bioavailability of heavy metalsIngelmo Sánchez, FlorencioMolina, M. J.Soriano, María DesamparadosGallardo, AntonioSewage sludgeCompostsHumic substancesHuminHeavy metalsBioavailability6 páginas, 3 tablas.The agricultural use of anaerobically digested sewage sludge (ADSS) as stable, mature compost implies knowing its total content in heavy metals and their bioavailability. This depends not only on the initial characteristics of the composted substrates but also on the organic matter transformations during composting which may influence the chemical form of the metals and their bioavailability. The objective of this work was to examine the relationships between the changes in the organic matter content and humus fractions, and the bioavailability of heavy metals. A detailed sampling at 0, 14, 84, and 140 days of the composting process was performed to measure C contents in humic acids (HAs), fulvic acids, (FAs) and humin, the total content of Zn, Pb, Cu, Ni, and Cd, and also their distribution into mobile and mobilisable (MB), and low bioavailability (LB) forms. Significant changes of C contents in HA, FA, and Humin, and in the FA/HA, HA/Humin and Chumus/TOC ratios were observed during composting. The MB and LB fractions of each metal also varied significantly during composting. The MB fraction increased for Zn, Cu, Ni, and Cd, and the LB fraction increased for Pb. Stepwise linear regressions and quadratic curve estimation conducted on the MB and LB fractions of each metal as dependent on the measured organic variables suggested that Zn bioavailability was mainly associated to percentage of C in FAs. Bioavailability of Cu, Ni and Cd during composting was associated to humin and HAs. Pb concentration increased in the LB form, and its variations followed a quadratic function with the Chumus/TOC ratio. Our results suggest that the composting process renders the metals in more available forms. The main forms of metal binding in the sludge and their availability in the final compost may be better described when metal fractionation obtained in sequential extraction and humus fractionation during composting are considered together.This work was part of the Generalitat Valenciana projects IIARCO2004-A-196, IIARCO2004-A-212, and IIARCO/2004/213, and the national project 135/2004/3 (Ministerio de Medio Ambiente). We thank FACSA Sewage Treatment Plant (Castellón, Spain), and University Jaume I of Castellón (Spain) for providing materials and technical assistance. We thank the two anonymous reviewers for their useful comments on the manuscript.Peer reviewedElsevierGeneralitat ValencianaMinisterio de Medio Ambiente (España)201220122012info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501http://hdl.handle.net/10261/45705reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://dx.doi.org/10.1016/j.jenvman.2011.04.015info:eu-repo/semantics/openAccessoai:digital.csic.es:10261/457052026-05-22T06:33:51Z
dc.title.none.fl_str_mv Influence of organic matter transformations on the bioavailability of heavy metals
title Influence of organic matter transformations on the bioavailability of heavy metals
spellingShingle Influence of organic matter transformations on the bioavailability of heavy metals
Ingelmo Sánchez, Florencio
Sewage sludge
Composts
Humic substances
Humin
Heavy metals
Bioavailability
title_short Influence of organic matter transformations on the bioavailability of heavy metals
title_full Influence of organic matter transformations on the bioavailability of heavy metals
title_fullStr Influence of organic matter transformations on the bioavailability of heavy metals
title_full_unstemmed Influence of organic matter transformations on the bioavailability of heavy metals
title_sort Influence of organic matter transformations on the bioavailability of heavy metals
dc.creator.none.fl_str_mv Ingelmo Sánchez, Florencio
Molina, M. J.
Soriano, María Desamparados
Gallardo, Antonio
author Ingelmo Sánchez, Florencio
author_facet Ingelmo Sánchez, Florencio
Molina, M. J.
Soriano, María Desamparados
Gallardo, Antonio
author_role author
author2 Molina, M. J.
Soriano, María Desamparados
Gallardo, Antonio
author2_role author
author
author
dc.contributor.none.fl_str_mv Generalitat Valenciana
Ministerio de Medio Ambiente (España)
dc.subject.none.fl_str_mv Sewage sludge
Composts
Humic substances
Humin
Heavy metals
Bioavailability
topic Sewage sludge
Composts
Humic substances
Humin
Heavy metals
Bioavailability
description 6 páginas, 3 tablas.
publishDate 2012
dc.date.none.fl_str_mv 2012
2012
2012
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/45705
url http://hdl.handle.net/10261/45705
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://dx.doi.org/10.1016/j.jenvman.2011.04.015
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812455

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