2024-03-29T04:36:49Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/895872018-09-13T07:19:08Zcom_10261_15com_10261_6col_10261_898
Efecto de la recuperación natural asistida en la distribución de elementos traza en un suelo contaminado
Madejón, Engracia
Pérez de Mora, Alfredo
Madrid Díaz, Fernando
Burgos, Pilar
Cabrera, Francisco
Agrostis
Amendments
Remediation
Sequential extraction
Trace elements
7 páginas, 1 figura, 1 tabla, 17 referencias.-- Publicado en el Tomo III. Sección VII Salud y ambiente.
We used a widely accepted sequential extraction procedure to assess possible shifts in
trace element pools (As, Cd, Cu, Pb and Zn) of a contaminated soil that was revegetated with
agrostis (Agrostis stolonifera L.) and where amendments had been applied. The experiment
lasted 30 months and was carried out in containers. Seven treatments were established: four
organic, one inorganic and two controls (control without amendment but with agrostis and
control without amendment and without agrostis). Addition of amendments produced some
changes in trace element distribution, but only showed a small influence on trace element
extractability associated with the first fractions (most labile pool). The rhizosphere did not
affect trace element distribution at all, as results from both controls were very similar. Arsenic
and Pb showed were mainly recovered in the residual fraction. In contrast, residual fraction
accounted for 70% of total Cd, 50% of total Cu and 30-40% of total Zn. Cu association with
the third fraction (where organically-bound Cu is expected) and Zn association with the first
fraction (most labile) were higher than for the other elements. Natural attenuation processes
or the intrinsic recalcitrant nature of the contamination are the main factors controlling the
distribution of trace elements in our soil. Reclamation practices improved soil quality and
did not reverse trace element stabilization in soil.
2014-01-17T11:09:29Z
2014-01-17T11:09:29Z
2006
capítulo de libro
Medioambiente en Iberoamérica. Visión desde la física y la química en los albores del siglo XXI 3: 209-215 (2006)
978-84-611-0352-2
http://hdl.handle.net/10261/89587
spa
openAccess
Diputación de Badajoz