Hydrogeochemical characteristics of the Tinto and Odiel Rivers (SW Spain). Factors controlling metal contents

Cánovas, Carlos Ruiz; Álvarez, Manuel Olías; Nieto, José Miguel; Sarmiento, Aguasanta Miguel; Cerón, J. C.

doi:10.1016/j.scitotenv.2006.11.022

Cited by 168 publications

(101 citation statements)

References 43 publications

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“…iron was determined using colorimetric method and ferric (Fe 3? ) iron was calculated as the difference between dissolved iron and ferrous iron (Cánovas et al 2007). Anions (F,Cl,Br,NO 3 , NO 2 , and SO 4 ) were determined by ion chromatography (Dionex ICS-3000, Thermo Fisher Scientific Inc, USA).…”

Section: Chemical Analysismentioning

confidence: 99%

“…The spatial and temporal distribution of trace elements in surface water can be affected by various hydrological, geochemical, and microbiological processes. Understanding the physical and chemical processes controlling the distribution of trace elements is a prerequisite for developing remediation strategies in watersheds contaminated by mining (Cánovas et al 2007;Kimball et al 2010;Nordstrom 2011;Runkel et al 2012). …”

Section: Introductionmentioning

confidence: 99%

“…In addition, a large fraction of the contaminants released from mining operations have been deposited in the bottom and bank sediment along stream channels. Seasonal changes in geochemical and hydrological conditions can cause the release of trace elements from stream sediment into the aqueous environment through processes such as mineral dissolution, surface desorption, and particle resuspension (Cánovas et al 2007(Cánovas et al , 2012Santos Bermejo et al 2003).…”

Section: Introductionmentioning

confidence: 99%

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Spatial Distribution of As, Cr, Pb, Cd, Cu, and Zn in the Water and Sediment of a River Impacted by Gold Mining

Zhang

Zhou

2013

Mine Water Environ

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Historical and active mining has adversely affected the geochemistry of the Jiehe River in the Jiaodong Peninsula, which has the largest gold ore reserves in China. Water and sediment samples were collected along the 37.8 km long river during the critical low flow season. Samples were analyzed for their geochemical properties, total concentrations of As, Cr, Pb, Cd, Cu, and Zn in the sediment, and dissolved/particulate concentrations of trace elements in filtered/unfiltered water samples. Our results demonstrate that substantial amount of these elements have been released into the Jiehe River during the processes of extracting, selecting, processing, and smelting at the many historical and active gold mining sites in the watershed. High concentrations of potentially toxic elements (1.9-1,004 lg L -1 As, 4.2-210 lg L -1 Cr, 7.9-9,529 lg L -1 Pb, 2.0-855 lg L -1 Cd, 47.4-8,494 lg L -1 Cu, and 105-11,336 lg L -1 Zn) have seriously affected water quality in the region. In addition, these contaminants have accumulated in the bed sediment (7.7-181 mg kg -1 As, 24.1-726 mg kg -1 Cr, 9.9-1,100 mg kg -1 Pb, 0.1-51.8 mg kg -1 Cd, 22.1-1,524 mg kg -1 Cu, and 53.5-5,484 mg kg -1 Zn). Spatial distribution of these contaminants in water and sediment is controlled by the discharge from point and non-point sources as well as the reactive transport processes. Spatial analysis conducted on the sediment and stream concentration of As, Pb, Cd, and Zn suggests that two mining-related sources, at 4.3 and 17.6 km downstream of the headwaters, contributed most of the As, Pb, Cd, and Zn load as particulates. In contrast, high levels of Cr and Cu in the sediment are not related to the current loading pattern and may be due to historical sources. As the first comprehensive study on the pollution caused by intensive gold mining in this area, this research has provided much needed information to establish effective management and remediation strategies.

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Section: Chemical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spatial Distribution of As, Cr, Pb, Cd, Cu, and Zn in the Water and Sediment of a River Impacted by Gold Mining

Zhang

Zhou

2013

Mine Water Environ

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“…Los resultados obtenidos en este estudio también indican que las concentraciones de Mn, Pb, Cu y Zn en los sedimentos del Puyango son mayores a las concentraciones de estos mismos elementos reportadas por Adánez et al (2014) en los sedimentos de los ríos Odiel y Tinto (Mn 717 y 187 mg/kg, Pb 212 y 977 mg/kg, Cu 1220 y 535 mg/kg y Zn 452 y 232 mg/kg), ríos que drenan cuencas localizadas en la Faja Pirítica Ibérica (Huelva, España) y que han sido fuertemente afectados por las actividades mineras y el drenaje ácido de minas por más de 5000 años (Cánovas et al 2007). De manera similar, las concentraciones de Hg total en los sedimentos después de las plantas de beneficio presentan valores muy parecidos a los encontrados en los sedimentos de ciertos ríos que han sido impactados por la minería aurífera artesanal en Ghana (valores entre 1.2 y 8.5 mg/kg), en el sureste de Senegal (valor máximo de 9.9 mg/kg) y en la región de La Mojana (valores entre 0.19 y 1,19 mg/kg), al norte de Colombia (Niane et al 2014, AdjeiKyereme et al 2015, Pinedo-Hernández et al 2015.…”

Section: Cuadro III Concentraciones Promedio De Los Elementos Determunclassified

Niveles De Metales Pesados en Sedimentos De La Cuenca Del Río Puyango, Ecuador

Mora

Jumbo-Flores

González-Merizalde

et al. 2016

Rev. Int. Contam. Ambie.

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Palabras clave: minería, mercurio, Sudamérica, contaminación RESUMENEn este estudio se determinaron las concentraciones de Al, Co, Cu, Fe, Hg, Ni, Mn, Pb y Zn en muestras de sedimentos de fondo del río Puyango y de algunos de sus tributarios con el objeto de conocer los factores de enriquecimiento de estos elementos en los sedimentos. Las muestras de sedimento fueron sometidas a digestión ácida utilizando el método EPA 3050B, para luego ser analizadas por espectrofotometría de absorción atómica. Las muestras para el análisis de Hg total fueron digeridas con una mezcla de HNO 3 , HCl y KMNO 4 y determinadas con la técnica de arrastre de vapor frío. Las mayores concentraciones de metales pesados fueron encontradas en los sedimentos colectados en el sector localizado después de la confluencia entre los ríos Calera y Amarillo. Los altos niveles de metales pesados y las bajas concentraciones de Al en los sedimentos de este sector indican que estos últimos están compuestos principalmente de mineral polimetálico, el cual ha sido descargado por las plantas procesadoras de mineral después del proceso de extracción de oro. Los sedimentos de las secciones media y baja del río Puyango se encuentran severamente contaminados con los elementos Hg, Cu, Pb, Zn y Mn, así como moderadamente contaminados con Co y Fe. Las altas concentraciones de Hg, Cu, Pb, Zn, Mn y Fe en los sedimentos de estos ríos pueden tener un efecto adverso para la biota acuática, de acuerdo con los criterios establecidos en normas internacionales.Key words: mining, mercury, South America, contamination ABSTRACTIn this study the concentrations of Al, Co, Cu, Fe, Hg, Mn, Ni, Pb and Zn were determined in bottom sediment samples of the Puyango River and its tributaries with the goal to know the enrichment factors of these elements in the sediments. Bulk sediment samples were digested using the EPA method 3050B and then analyzed by atomic absorption spectrometry. The samples for Hg determinations were digested with a mixture of HNO 3 , HCl y KMNO 4 and then analyzed by the cold-vapor generation technique. The highest concentrations of heavy metals in sediments were found in the sector located after the Calera-Amarillo rivers confluence. The high levels of heavy metals and the low concentrations of Al in the bottom sediments of this sector indicate

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“…The mobility of such hazardous trace elements is highly dependent on their specific chemical forms or different binding forms rather than on the total element concentrations. Consequently, knowledge of trace element partitioning between the different geochemical fractions is particularly useful for determining the bio-available fraction and the risk of eco-toxicity (Cánovas et al 2007(Cánovas et al , 2008Galan et al 2003;Kraus andWindegand 2006, Lynch et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Experimental Study of Mobility and Kinetic Characterization of Trace Elements in Contaminated Sediments from a River Basin in Northern Peru

Yacoub

Miralles

Valderrama

2014

Human and Ecological Risk Assessment: An International Journal

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In the Jequetepeque basin (Peru), gold extraction activity has been performed in the last decades, leading to a release of metals and metalloids into the environment. Sediment samples were taken in the vicinity of two mines and analysed. Extraction of metals and metalloids from sediments was carried out using single extraction procedures, acidic (HNO 3 ), and complexation (EDTA) leaching, in order to determine the mobility of trace elements. Results indicated that acidic extraction at low pH values increased the leachability of trace elements. EDTA showed a higher bioavailability of metals in sediments that acidic extraction under similar pH conditions because of its greater leaching capacity. This is an important issue in view of risk assessment analysis. The highest extractability was observed for Cd in all sediments with up to 90% of extraction after 1 hour. The mobility index analysis indicated that faster kinetic leachability of some trace elements leads to a higher mobility in sediments, especially those near the active gold extraction mine. The ecological risk assessment suggested that the four river sediments were at high and very high risk levels, indicating that sediment contamination is an issue of environmental concern in the Jequetepeque basin of northern Peru.

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Hydrogeochemical characteristics of the Tinto and Odiel Rivers (SW Spain). Factors controlling metal contents

Cited by 168 publications

References 43 publications

Spatial Distribution of As, Cr, Pb, Cd, Cu, and Zn in the Water and Sediment of a River Impacted by Gold Mining

Spatial Distribution of As, Cr, Pb, Cd, Cu, and Zn in the Water and Sediment of a River Impacted by Gold Mining

Niveles De Metales Pesados en Sedimentos De La Cuenca Del Río Puyango, Ecuador

Experimental Study of Mobility and Kinetic Characterization of Trace Elements in Contaminated Sediments from a River Basin in Northern Peru

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