Amendments and plant cover influence on trace element pools in a contaminated soil
A 30-month experiment was carried out in field containers to evaluate the potential of various amendments and/or a plant cover (Agrostis stolonifera L.) for reclamation of a soil contaminated with As, Cd, Cu, Pb and Zn. Five amended treatments with plant were established: leonardite (LEO), litter (LIT), municipal waste compost (MWC), biosolid compost (BC) and sugar beet lime (SL). Two controls were also set up: control without amendment but with plant (CTRP) and control without amendment and without plant (CTR). A widely accepted sequential extraction procedure was used to assess changes in trace element pools in soil following remediation. Results showed that trace element distribution in soil was highly influenced by the origin of the contamination (mine sulphides): trace elements were mainly associated with the residual fraction (in form of sulphides) and to a lesser extent with the reducible fraction, where Fe oxides and oxyhydroxides are expected, as a consequence of sulphide oxidation. The addition of amendments and/or establishment of a plant cover showed no clear effect on Cd and Pb distribution. The influence on As fractionation was also small and restricted to the most labile fraction, where higher concentrations of As were found in SL, MWC and BC. In contrast, Cu concentrations in the most labile fraction decreased in MWC, BC, LEO and LIT, while Cu recovery within the organic matter-associated fraction increased in these treatments. Zinc concentration in the most labile fraction was significantly lower in CTRP than in CTR, whereas Zn recovery in this fraction increased in MWC due to Zn input. In some cases redistribution of amendment-derived trace elements from slow-releasing fractions to the residual pool seemed to occur. Since the increase in As and Zn only accounted for a small proportion of the total pool and soil quality improved in treated soils, the use of soil amendments and/or revegetation might be a reliable option for long-term reclamation of soils moderately contaminated with trace elements. Nonetheless, high quality by-products should be employed to minimize trace element input to soil.
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dig-irnas-es-10261-601982018-09-13T07:19:07Z Amendments and plant cover influence on trace element pools in a contaminated soil Pérez de Mora, Alfredo Madrid Díaz, Fernando Cabrera, Francisco Madejón, Engracia Comisión Interministerial de Ciencia y Tecnología, CICYT (España) Ministerio de Educación y Ciencia (España) A 30-month experiment was carried out in field containers to evaluate the potential of various amendments and/or a plant cover (Agrostis stolonifera L.) for reclamation of a soil contaminated with As, Cd, Cu, Pb and Zn. Five amended treatments with plant were established: leonardite (LEO), litter (LIT), municipal waste compost (MWC), biosolid compost (BC) and sugar beet lime (SL). Two controls were also set up: control without amendment but with plant (CTRP) and control without amendment and without plant (CTR). A widely accepted sequential extraction procedure was used to assess changes in trace element pools in soil following remediation. Results showed that trace element distribution in soil was highly influenced by the origin of the contamination (mine sulphides): trace elements were mainly associated with the residual fraction (in form of sulphides) and to a lesser extent with the reducible fraction, where Fe oxides and oxyhydroxides are expected, as a consequence of sulphide oxidation. The addition of amendments and/or establishment of a plant cover showed no clear effect on Cd and Pb distribution. The influence on As fractionation was also small and restricted to the most labile fraction, where higher concentrations of As were found in SL, MWC and BC. In contrast, Cu concentrations in the most labile fraction decreased in MWC, BC, LEO and LIT, while Cu recovery within the organic matter-associated fraction increased in these treatments. Zinc concentration in the most labile fraction was significantly lower in CTRP than in CTR, whereas Zn recovery in this fraction increased in MWC due to Zn input. In some cases redistribution of amendment-derived trace elements from slow-releasing fractions to the residual pool seemed to occur. Since the increase in As and Zn only accounted for a small proportion of the total pool and soil quality improved in treated soils, the use of soil amendments and/or revegetation might be a reliable option for long-term reclamation of soils moderately contaminated with trace elements. Nonetheless, high quality by-products should be employed to minimize trace element input to soil. This study was carried out in the framework of the project REN 2000-1519 TECNO supported by the CICYT. Dr Pérez de Mora thanks the Spanish MEC for the financial support. Peer Reviewed 2012-11-14T11:35:21Z 2012-11-14T11:35:21Z 2007 2012-11-14T11:35:21Z artículo http://purl.org/coar/resource_type/c_6501 doi: 10.1016/j.geoderma.2006.12.001 issn: 0016-7061 e-issn: 1872-6259 Geoderma 139(1-2): 1-10 (2007) http://hdl.handle.net/10261/60198 10.1016/j.geoderma.2006.12.001 http://dx.doi.org/10.13039/501100007273 en none Elsevier |
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A 30-month experiment was carried out in field containers to evaluate the potential of various amendments and/or a plant cover (Agrostis stolonifera L.) for reclamation of a soil contaminated with As, Cd, Cu, Pb and Zn. Five amended treatments with plant were established: leonardite (LEO), litter (LIT), municipal waste compost (MWC), biosolid compost (BC) and sugar beet lime (SL). Two controls were also set up: control without amendment but with plant (CTRP) and control without amendment and without plant (CTR). A widely accepted sequential extraction procedure was used to assess changes in trace element pools in soil following remediation. Results showed that trace element distribution in soil was highly influenced by the origin of the contamination (mine sulphides): trace elements were mainly associated with the residual fraction (in form of sulphides) and to a lesser extent with the reducible fraction, where Fe oxides and oxyhydroxides are expected, as a consequence of sulphide oxidation. The addition of amendments and/or establishment of a plant cover showed no clear effect on Cd and Pb distribution. The influence on As fractionation was also small and restricted to the most labile fraction, where higher concentrations of As were found in SL, MWC and BC. In contrast, Cu concentrations in the most labile fraction decreased in MWC, BC, LEO and LIT, while Cu recovery within the organic matter-associated fraction increased in these treatments. Zinc concentration in the most labile fraction was significantly lower in CTRP than in CTR, whereas Zn recovery in this fraction increased in MWC due to Zn input. In some cases redistribution of amendment-derived trace elements from slow-releasing fractions to the residual pool seemed to occur. Since the increase in As and Zn only accounted for a small proportion of the total pool and soil quality improved in treated soils, the use of soil amendments and/or revegetation might be a reliable option for long-term reclamation of soils moderately contaminated with trace elements. Nonetheless, high quality by-products should be employed to minimize trace element input to soil. |
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Comisión Interministerial de Ciencia y Tecnología, CICYT (España) |
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Comisión Interministerial de Ciencia y Tecnología, CICYT (España) Pérez de Mora, Alfredo Madrid Díaz, Fernando Cabrera, Francisco Madejón, Engracia |
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Pérez de Mora, Alfredo Madrid Díaz, Fernando Cabrera, Francisco Madejón, Engracia |
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Pérez de Mora, Alfredo Madrid Díaz, Fernando Cabrera, Francisco Madejón, Engracia Amendments and plant cover influence on trace element pools in a contaminated soil |
author_sort |
Pérez de Mora, Alfredo |
title |
Amendments and plant cover influence on trace element pools in a contaminated soil |
title_short |
Amendments and plant cover influence on trace element pools in a contaminated soil |
title_full |
Amendments and plant cover influence on trace element pools in a contaminated soil |
title_fullStr |
Amendments and plant cover influence on trace element pools in a contaminated soil |
title_full_unstemmed |
Amendments and plant cover influence on trace element pools in a contaminated soil |
title_sort |
amendments and plant cover influence on trace element pools in a contaminated soil |
publisher |
Elsevier |
publishDate |
2007 |
url |
http://hdl.handle.net/10261/60198 http://dx.doi.org/10.13039/501100007273 |
work_keys_str_mv |
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