Thresholds of copper phytotoxicity in field-collected agricultural soils exposed to copper mining activities in Chile

Verdejo, José; Ginocchio, Rosanna; Sauvé, Sébastien; Salgado, Eduardo Gomes; Neaman, Alexander

doi:10.1016/j.ecoenv.2015.07.026

Cited by 50 publications

(29 citation statements)

References 42 publications

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“…These findings differ from results of our previous study with the same set of soils (Verdejo et al, 2015), in which we reported that the effects of soil nutrient availability on the ryegrass responses were not significant. Thus, lettuce has a limited applicability for metal toxicity assessment in field-collected metalcontaminated soils, due to sensitivity of its response to P deficiency often observed in non-agricultural areas.…”

Section: Resultscontrasting

confidence: 57%

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Thresholds of copper toxicity to lettuce in field-collected agricultural soils exposed to copper mining activities in Chile

Verdejo

Ginocchio

Sauvé

et al. 2016

J. Soil Sci. Plant Nutr.

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Several previous studies highlighted the importance of using field-collected soils instead of artificially spiked contaminated soils for phytotoxicity tests. However, the use of field-collected soils presents several difficulties for interpretation of results, due to presence of various contaminants in the soil and unavoidable differences in the physicochemical properties of the tested soils. The objective of this study was to estimate thresholds of copper phytotoxicity in topsoils of 27 agricultural areas historically contaminated by mining activities in Chile. We performed standard emergence and early growth (21 days) tests (OECD 208 and ISO 11269-2) with lettuce. The response of lettuce was best explained by Cu toxicity and P deficiency. Growth of lettuce was related to soil total Cu concentration and Olsen-P and was not affected by soluble Cu (extractable by 0.1 M KNO 3 ) or Cu 2+ free ion activity of the soil solution. Thus, lettuce has a limited applicability for metal toxicity assessment in metalcontaminated soils, due to sensitivity of its response to P deficiency. However, it was possible to determine toxic thresholds for shoot concentrations of Cu in lettuce for responses of shoot and root length, suggesting that shoot concentrations of Cu in lettuce can be useful as indicators of Cu toxicity even in soils with a wide range of nutrient concentrations.

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Section: Resultscontrasting

confidence: 57%

“…A detailed description of methodology can be found in our previous study (Verdejo et al, 2015) and in the …”

Section: Methodsmentioning

confidence: 99%

Thresholds of copper toxicity to lettuce in field-collected agricultural soils exposed to copper mining activities in Chile

Verdejo

Ginocchio

Sauvé

et al. 2016

J. Soil Sci. Plant Nutr.

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“…(González et al, 2008). Debido a la importancia del Cu y su papel en la contaminación de suelos en el norte y centro de Chile (Badilla-Ohlbaum et al, 2001;Ginocchio, Rodríguez, Badilla-Ohlbaum, Allen, & Lagos, 2002;González, 1994;Verdejo et al, 2015), es fundamental establecer la capacidad de adaptación de nuevas especies vegetales a condiciones extremas de degradación del suelo. En este contexto, el objetivo de esta investigación fue determinar y comparar las capacidades de fitoestabilización de especies arbustivas nativas y exóticas en zonas altamente dañadas por actividades mineras.…”

Section: Study Areaunclassified

“…Some of these mining sites are now environmental liabilities, resulting in significant risks to the health of the population and the environment (Ginocchio et al, 2006;Karczewska et al, 2015;Mendez & Maier, 2008;Verdejo, Ginocchio, Sauvé, Salgado, & Neaman, 2015).…”

Section: Introductionmentioning

confidence: 99%

“…(González et al, 2008). Due to the importance of Cu and its role in soil pollution in northern and central Chile (Badilla-Ohlbaum et al, 2001;Ginocchio, Rodríguez, Badilla-Ohlbaum, Allen, & Lagos, 2002;González, 1994;Verdejo et al, 2015), it is critical that the adaptability of new vegetative species to extreme soil degradation conditions have been established. The objective was to determine and compare the phytostabilization capacities of native and exotic shrub species in areas highly damaged by mining activities.…”

Section: Introductionmentioning

confidence: 99%

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Forest species in the recovery of soils contaminated with copper due to mining activities

Pizarro¹,

Flores²,

Tapia³

et al. 2015

rchscfa

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Mining is the most important economic activity in Chile; causing significant degradation of the environment in the arid regions. The Coquimbo Region has suffered serious soil and water pollution because of heavy metals from mining, particularly copper. Implementation of measures that help to minimize the environmental impact of mining tailings requires knowledge about the adaptability of vegetal species to degraded soil conditions. Our objective was to determine and compare the phytostabilization abilities of native and exotic shrub species in areas extremely damaged by mining activities in the Coquimbo Region. The survival growth, and canopy development rates of 20 species were evaluated by two experiments. The Cu quantity in stems and leaves and at three soil depths was measured. Our results indicated that Acacia saligna is the best species in accumulating heavy metals (average of 34.8 ppm in leaves and 12.3 ppm in stems, both for non-fertilized soils), while demonstrating average survival rates over 80 %. This study concludes that A. saligna is the best species for phytostabilization activities in mine tailings of the Coquimbo Region. ResumenL a minería es la actividad económica más importante de Chile, la cual causa degradación significativa en las regiones áridas. Los suelos de la Región de Coquimbo han sufrido contaminación metales pesados provenientes de la minería, particularmente cobre. La implementación de medidas, que ayuden a minimizar el impacto ambiental de los relaves mineros, requiere conocer la capacidad de adaptación de especies vegetales ante la degradación de suelos contaminados. El objetivo de este estudio fue determinar y comparar la capacidad de fitoestabilización de especies vegetales nativas y exóticas en áreas degradadas por la actividad minera en la Región de Coquimbo. Las tasas de supervivencia, crecimiento y desarrollo del dosel de 20 especies fueron evaluadas en dos ensayos experimentales. La concentración de Cu se evaluó en tallos y hojas de los árboles y en diferentes profundidades del suelo. Los resultados indicaron que Acacia saligna tiene la mejor capacidad de acumulación de metales pesados (34.8 ppm en hojas y 12.3 ppm en tallos, ambos en suelos sin fertilizar), con tasas de supervivencia mayores de 80 %. Se concluye que A. saligna es la mejor especie para actividades de fitoestabilización en relaves mineros de la Región de Coquimbo. Palabras clave:Fitorremediación, fitoestabilización, fitotoxicidad, relaves mineros, degradación de suelos, manejo y conservación de suelos.

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Soil ecotoxicology in Latin America: Current research and perspectives

Niemeyer

Chelinho

Sousa

2017

Enviro Toxic and Chemistry

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Soils from some Latin American countries support the highest biodiversity levels on the planet and simultaneously have some of the most serious environmental impacts attributed to both historical and current agricultural practices and industrial activities. Soil contamination has resulted from intensive use of pesticides, extensive mining and other industrial activities, and uncontrolled management of waste within inappropriate regulatory frameworks. The present study presents an overview of the scientific research on soil ecotoxicology conducted in Latin America, summarizing the recent advances and highlighting the needs for further refinements in this research field. Most of the contributions to the scientific literature have been from Brazil. The most investigated issue is the ecotoxicity of pesticides and earthworms, which were the organisms most frequently used as test species. Needs identified by Latin American researchers include methods and procedures for: 1) identifying and collecting natural soils to be used as reference test-substrates in tests, 2) identifying and discerning the range of sensitivities of native test species to soil contaminants, 3) developing environmental guidelines applicable to tropical/subtropical conditions, and 4) developing methods and procedures for higher tier testing for full development and implementation of environmental risk assessment schemes. The protection of Latin American soils, including provision of goods and services, is currently framed in legislation and other regulations, but implementation requires significant improvement and additional training programs. Environ Toxicol Chem 2017;36:1795-1810. © 2017 SETAC.

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Thresholds of copper phytotoxicity in field-collected agricultural soils exposed to copper mining activities in Chile

Cited by 50 publications

References 42 publications

Thresholds of copper toxicity to lettuce in field-collected agricultural soils exposed to copper mining activities in Chile

Thresholds of copper toxicity to lettuce in field-collected agricultural soils exposed to copper mining activities in Chile

Forest species in the recovery of soils contaminated with copper due to mining activities

Soil ecotoxicology in Latin America: Current research and perspectives

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