Influence of organic matter transformations on the bioavailability of heavy metals

Influence of organic matter transformations on the bioavailability of heavy metals

6 páginas, 3 tablas.

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Main Authors: Ingelmo Sánchez, Florencio, Molina, M. J., Soriano, María Desamparados, Gallardo, Antonio
Other Authors: Generalitat Valenciana
Format: artículo biblioteca
Language:English
Published: Elsevier 2012-03
Subjects:Sewage sludge, Composts, Humic substances, Humin, Heavy metals, Bioavailability,
Online Access:http://hdl.handle.net/10261/45705
http://dx.doi.org/10.13039/501100003359
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spelling dig-cide-es-10261-457052016-02-17T08:07:05Z Influence of organic matter transformations on the bioavailability of heavy metals Ingelmo Sánchez, Florencio Molina, M. J. Soriano, María Desamparados Gallardo, Antonio Generalitat Valenciana Ministerio de Medio Ambiente (España) Sewage sludge Composts Humic substances Humin Heavy metals Bioavailability 6 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 reviewed 2012-02-16T09:45:09Z 2012-02-16T09:45:09Z 2012-03 artículo http://purl.org/coar/resource_type/c_6501 Journal of Environmental Management 95: S104-S109 (2012) 0301-4797 http://hdl.handle.net/10261/45705 10.1016/j.jenvman.2011.04.015 http://dx.doi.org/10.13039/501100003359 en http://dx.doi.org/10.1016/j.jenvman.2011.04.015 open Elsevier
institution CIDE ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-cide-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del CIDE España
language English
topic Sewage sludge
Composts
Humic substances
Humin
Heavy metals
Bioavailability
Sewage sludge
Composts
Humic substances
Humin
Heavy metals
Bioavailability
spellingShingle Sewage sludge
Composts
Humic substances
Humin
Heavy metals
Bioavailability
Sewage sludge
Composts
Humic substances
Humin
Heavy metals
Bioavailability
Ingelmo Sánchez, Florencio
Molina, M. J.
Soriano, María Desamparados
Gallardo, Antonio
Influence of organic matter transformations on the bioavailability of heavy metals
description 6 páginas, 3 tablas.
author2 Generalitat Valenciana
author_facet Generalitat Valenciana
Ingelmo Sánchez, Florencio
Molina, M. J.
Soriano, María Desamparados
Gallardo, Antonio
format artículo
topic_facet Sewage sludge
Composts
Humic substances
Humin
Heavy metals
Bioavailability
author Ingelmo Sánchez, Florencio
Molina, M. J.
Soriano, María Desamparados
Gallardo, Antonio
author_sort Ingelmo Sánchez, Florencio
title Influence of organic matter transformations on the bioavailability of heavy metals
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
publisher Elsevier
publishDate 2012-03
url http://hdl.handle.net/10261/45705
http://dx.doi.org/10.13039/501100003359
work_keys_str_mv AT ingelmosanchezflorencio influenceoforganicmattertransformationsonthebioavailabilityofheavymetals
AT molinamj influenceoforganicmattertransformationsonthebioavailabilityofheavymetals
AT sorianomariadesamparados influenceoforganicmattertransformationsonthebioavailabilityofheavymetals
AT gallardoantonio influenceoforganicmattertransformationsonthebioavailabilityofheavymetals
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