Trace element and nutrient accumulation in sunflower plants two years after the Aznalcóllar mine spill

Madejón, Paula; Murillo, J.M.; Marañón, Teodoro; Cabrera, Francisco; Soriano, María-Auxiliadora

doi:10.1016/s0048-9697(02)00609-5

Cited by 166 publications

(95 citation statements)

References 32 publications

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“…In spite of the high doses of biosolids applied, extractable heavy metal concentrations were below the levels considered toxic to plants (Madejón et al, 2003). The high pH and the CaCO3 content of the soil justify the low levels of the DPTA-extractable heavy metals found.…”

Section: Discussionmentioning

confidence: 94%

Biosolid amendment of a calcareous, degraded soil in a semi-arid environment

Walter¹,

Martínez²,

Cuevas³

2006

Span. j. agric. res.

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Many soils in the Mediterranean region are subjected to progressive degradation as a result of water erosion. A study was carried out to examine the effects of biosolids on a degraded soil. Single doses of 40, 80 and 120 Mg ha -1 of a biosolid were applied to the surface of soil and their effects on its chemical characteristics and on the native vegetation were assessed. Soil macronutrients, micronutrients and heavy metals were tested one and five years after application. Canopy cover, biomass production and mineral composition of native vegetation were also determined. Biosolids increased the content of most nutrients in the soil, although this effect decreased over time. The soil organic matter content did not increase significantly at the beginning of the experiment, although significant differences were observed after five years. The contents of total and extractable heavy metals did not change with time after the application. The native plant biomass production and the canopy cover significantly increased with all the doses applied at the beginning of the experiment, and remained high five years after biosolids application.Additional key words: canopy cover, heavy metals, native plant biomass, soil chemical properties, soil restoration. Resumen Aplicación de un biosólido como enmienda sobre un suelo degradado y calcáreo en un ambiente semiáridoSe ha realizado una experiencia de restauración de un suelo degradado en un ecosistema semiárido. Diferentes dosis de biosólidos (40, 80 and 120 Mg ha -1 ) fueron aplicados una única vez en superficie y se estudiaron sus efectos sobre las principales propiedades químicas del suelo y la cobertura vegetal, producción de biomasa y composición mineral de la vegetación nativa al año y a los cinco años de la aplicación. Las dosis de biosólido incrementaron los contenidos de nutrientes en el suelo, aunque su efecto disminuyó con el tiempo. El contenido de materia orgánica del suelo no experimentó cambio al comienzo de la experiencia, mientras que hubo diferencias significativas entre tratamientos en el último año. El contenido de metales pesados del suelo no varió a lo largo del estudio. La producción de biomasa y cobertura vegetal se incrementaron significativamente con todas las dosis ensayadas y permanecieron así a lo largo de los cinco años del estudio.Palabras clave adicionales: biomasa vegetal, cobertura vegetal, metales pesados, propiedades químicas del suelo, restauración de suelos.

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Section: Discussionmentioning

confidence: 94%

Biosolid amendment of a calcareous, degraded soil in a semi-arid environment

Walter¹,

Martínez²,

Cuevas³

2006

Span. j. agric. res.

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“…Plants are known to take up and accumulate trace metals from contaminated soils (Singh and Narwal, 1984;Bojakowska and Kochany, 1985;Pulford and Watson, 2003;Madejon et al, 2003), hence detection in vegetable samples was not surprising. Although levels of 0.022 mg/kg and 0.015 mg/ kg of Cd and Pb in cabbage and 0.035 mg/kg and 0.018 mg/kg in spinach respectively are within the normal range in plant leaves (Table 6), continual consumption could lead to accumulation with adverse health implications since Cd has been linked to renal diseases and cancer (Kjellstroem, 1986).…”

Section: Resultsmentioning

confidence: 99%

Levels of trace metals in water and sediment from Tyume River and its effects on an irrigated farmland

Awofolu

Mbolekwa

Mtshemla

et al. 2005

WSA

114

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Levels of trace metals (Cd, Pb, Co, Zn Cu and Ni) were determined in water and sediment from the Tyume River. Occurrence of these metals in vegetables and soil from a nearby farmland as a result of irrigation with the river water was also investigated. Higher levels of Cd (0.038 ± 0.004 to 0.044 ± 0.003 mg/l) and Pb (0.021 ± 0.004 to 0.035 ± 0.001 mg/l) were found in the river water, which may be detrimental to the "health" of the aquatic ecosystem and the rural communities that utilise the river water for domestic purposes without any treatment. Some of these metals were also detected in the soil and vegetables cultivated on the farmland which indicates a possible contribution from the river water.

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“…Madejón et al [24] observed an As extraction of about 3 g·ha -1 by growing H. annuus in a soil polluted by a mine spill. In our case, sorghum removed about 220 g·ha -1 of As.…”

Section: Discussionmentioning

confidence: 99%