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Research Interests: Demography, Geology, Paleontology, Crustacea, Acid Mine Drainage, and 15 moreMARINE POLLUTION, Indian ancient history, Rivers, Biodiversity, Mining, Medicine, Multidisciplinary, Spain, Animals, Microfauna, Population Density, Heavy Metal Contamination, Estuary, Protected Area, and Geologic Sediments
Sc, Y, Th, Cu and rare earth elements (REE) concentrations have been analyzed in 14 samples of surface sediments and in two gravity cores by means of ICP-MS. Mean concentrations of Sc, Y and Th in surface sediments are 6.23, 4.76 and... more
Sc, Y, Th, Cu and rare earth elements (REE) concentrations have been analyzed in 14 samples of surface sediments and in two gravity cores by means of ICP-MS. Mean concentrations of Sc, Y and Th in surface sediments are 6.23, 4.76 and 16.30 ppm, respectively, lower than those present in the Upper Continental Crust (UCC). Cu concentration in these sediments is very high, 1466 ppm, and is caused by inputs from the Odiel and Tinto rivers, affected by acid mine drainage. SigmaREE mean concentration is 106.8 ppm, lower than that observed in other rivers and estuaries. In the cores, Sc, Y and Th concentrations show a significant increase in the intermediate levels, between 10 and 40 cm depth. The same pattern exists with Cu, where concentrations of 4440 ppm can be reached. Vertical evolution patterns for Sc, Y, Cu and heavy REE (HREE) are similar, and contrary to those shown by Th, light REE (LREE) and middle REE (MREE). Plots of North American Shale Composite (NASC)-normalized REE data of surface sediments show a slight depletion in REE concentrations. Most samples present with middle REE enrichment relative to light REE and heavy REE. Conversely, samples of the intermediate levels of the cores show significant enrichment of REE relative to NASC and high values in the (La/Gd)NASC and (La/Yb)NASC ratios. These anomalies in the fractionation patterns caused by enrichments in LREE and MREE concentrations is related to the presence of high concentrations of Th. They were generated by effluents from fertilizer factories between 1968 and 1998 which used phosphorite as source material.
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Los trabajos incluidos en esta comunicacion se han podido desarrollar gracias a la financiacion de los siguientes proyectos: de la Comunidad Europea TOROS ENV4-CT96-217 ELOISE EC PROJECT; Proyecto de Excelencia de la Junta de Andalucia... more
Los trabajos incluidos en esta comunicacion se han podido desarrollar gracias a la financiacion de los siguientes proyectos: de la Comunidad Europea TOROS ENV4-CT96-217 ELOISE EC PROJECT; Proyecto de Excelencia de la Junta de Andalucia P06- RNM-02167;
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Fractionation of Fe, Cu, Zn, As, Cd, and Pb was studied in 17 surface sediment samples of the Ria of Huelva. In all the cases, total concentration of these elements was high, especially for Fe (11.2%), Zn (1519ppm), followed by Cu... more
Fractionation of Fe, Cu, Zn, As, Cd, and Pb was studied in 17 surface sediment samples of the Ria of Huelva. In all the cases, total concentration of these elements was high, especially for Fe (11.2%), Zn (1519ppm), followed by Cu (1413ppm), Pb (716ppm), As (442ppm), and Cd (3.26 ppm). The enrichment factors of these metals follow this order Cd≫ Cu> Zn∼ Pb> As> Fe with respect to the regional background. The highest concentrations associated with exchangeable or labile fractions are shown by Zn (85% of total concentration), followed by ...
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Concentrations and partitioning of particulate rare earth elements are studied in an estuary affected by acid mine drainage. A sequential extraction procedure was applied to 14 suspended matter samples collected from four cruises. The... more
Concentrations and partitioning of particulate rare earth elements are studied in an estuary affected by acid mine drainage. A sequential extraction procedure was applied to 14 suspended matter samples collected from four cruises. The results show that easy reducible fraction are mainly linked to LREEs>MREEs=HREEs. The total concentration of REEs in the suspended matter varies according to the volume of the fluvial contributions that arrive at Ria, thus these increases significantly at the times of greater contribution
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At the Od i e l and Tinto river mouths, Southwetern Iberian Peninsula, a tidal sedimen tary environment is constituted, being the tidal range mesotidal . Three antropic builds up and its derived influences are desctibed. So that, the... more
At the Od i e l and Tinto river mouths, Southwetern Iberian Peninsula, a tidal sedimen tary environment is constituted, being the tidal range mesotidal . Three antropic builds up and its derived influences are desctibed. So that, the Bacuta island salinas has produced the salt increasing of the geographic context. The bank of Huelva port has modified the time/velocity relation in the tidal cycles, as well the stop ping of bar sands and the generation of a beach environment at the external face of this bank. And the presence of gypsum, safts, - to storing industrial residues, has completely des troyed the ma r s h environments.
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The estuary of the Odiel and Tinto rivers is located in the southwest of the Iberian Peninsula on the western Gulf of Cadiz (Atlantic Ocean). The Huelva estuary is constituted by the common mouth of the Odiel and Tinto Rivers in a “Y”... more
The estuary of the Odiel and Tinto rivers is located in the southwest of the Iberian Peninsula on the western Gulf of Cadiz (Atlantic Ocean). The Huelva estuary is constituted by the common mouth of the Odiel and Tinto Rivers in a “Y” shape oriented in a N-S direction across 35 km long incised valley. This estuary was generated after the Flandrian Transgression (Holocene), which signified the marine inundation of the main fluvial valleys incised by the rivers during the last Pleistocene lowstand. It extends along the south-western coastal margin of the Guadalquivir sedimentary basin that was incised on Cenozoic non-consolidated sediments during the late Pleistocene and early Holocene when sea level was located up to 100 m below the present position. This estuary is presently completely filled with sediments and has started to prograde to build a delta. The fluvial basin of both rivers is seriously affected by acid mine drainage, so this estuary have a induces important changes in th...
For more than 40 years, the industrial complex which developed near Huelva (in SW Spain) produced a huge amount of phosphogypsum as a waste product of manufacturing fertilizers. This waste was stockpiled in a stack 25 m high, covering... more
For more than 40 years, the industrial complex which developed near Huelva (in SW Spain) produced a huge amount of phosphogypsum as a waste product of manufacturing fertilizers. This waste was stockpiled in a stack 25 m high, covering 1200 ha of what was once a salt marsh. The weight of that enormous amount of waste produced active subsidence in the underlying sediment. Part of the sediment was injected into the marginal areas, where the load pressure is minor, causing significant vertical movement in the floor of the estuarine channel. This manuscript describes several surficial features using multibeam echosound. A crest formed by cones and a bulge area could be interpreted as injection structures. The evolution of the topographic position of the floor was also analyzed by comparing different records of the estuarine bed in the margins of the stockpile. The data in this work document the changes in the dynamics of the estuary in relation to these vertical movements. These changes ...
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... 29: 51-59. Singh G, Rawat NS (1985).Removal of trace elements from acid mine drainage. International Journal of Mine Water IMWA Granada. 2: 817-827. Yukselen M, Alpaslan B. (2001). Leaching of metals from soil contaminated by mining... more
... 29: 51-59. Singh G, Rawat NS (1985).Removal of trace elements from acid mine drainage. International Journal of Mine Water IMWA Granada. 2: 817-827. Yukselen M, Alpaslan B. (2001). Leaching of metals from soil contaminated by mining activities. ...
Page 1. I Journal of Coastal Research 9 1 242-254 Fort Lauderdale, Florida Winter1993 Holocene Filling of an Estuarine Lagoon Along the Mesotidal Coast of Huelva: The Piedras River Mouth, Southwestern Spain' Jose' Borrego, JA... more
Page 1. I Journal of Coastal Research 9 1 242-254 Fort Lauderdale, Florida Winter1993 Holocene Filling of an Estuarine Lagoon Along the Mesotidal Coast of Huelva: The Piedras River Mouth, Southwestern Spain' Jose' Borrego, JA Morales and J. Gabriel Pendon ...
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ABSTRACT
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Marshes, both tidal and non-tidal, are productive and complex ecosystems. The water in these systems ranges from fresh, to brackish, to saline as one moves from inland to coastal areas. Marshes are an interface between upland and aquatic... more
Marshes, both tidal and non-tidal, are productive and complex ecosystems. The water in these systems ranges from fresh, to brackish, to saline as one moves from inland to coastal areas. Marshes are an interface between upland and aquatic habitats. In this book, the authors present current research in the study of the ecology, management and conservation of marshes including the climatic roles of marshes; the mesocosm marsh ecology of two southwestern Spanish estuaries; factors conditioning the vegetation in the salt marshes of the Atlantic Coast of the Iberian Peninsula; and nutrient cycling in salt marshes.
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Book Description: The Holocene (11.5 ka BP onwards), directly linked to the evolution of modern society, encompasses the increase and impacts of the human species world-wide, including by and large striking changeover towards living in... more
Book Description: The Holocene (11.5 ka BP onwards), directly linked to the evolution of modern society, encompasses the increase and impacts of the human species world-wide, including by and large striking changeover towards living in the present. The Holocene climate is also responsible for expansion/ migration/decline of the human cultures. Because of this, a period termed as Anthropocene (age of man) is also proposed as the latest part of this epoch since the recent human impacts have been found on the Earth and such impacts are unquestionably of global implication for our future. This book contains seventeen invaluable manuscripts submitted by the authors from diverse countries. While most of them are related to the climatic events and environmental dynamics during the Holocene, two chapters focus on the palaeoseismology and human migration/anatomy
The combination of acid water from mines, industrial effluents and sea water plays a determining role in the evolutionary process of the chemical makeup of the water in the estuary of the Tinto and Odiel rivers. This estuary is in the... more
The combination of acid water from mines, industrial effluents and sea water plays a determining role in the evolutionary process of the chemical makeup of the water in the estuary of the Tinto and Odiel rivers. This estuary is in the southwest of the Iberian Peninsula and is one of the estuarine systems on the northwest coast of the Gulf of Cádiz. From the statistical treatment of data obtained by analyzing samples of water from this system, which is affected by industrial and mining pollution processes, we can see how the sampling points studied form two large groups depending on whether they receive tidal or fluvial influences. Fluvial input contributes acid water with high concentrations of heavy metal, whereas industrial effluents are responsible for the presence of phosphates, silica and other nutrients. The estuarine system of the Tinto and Odiel Rivers can be divided into three areas--the Tinto estuary, the Odiel estuary and the area of confluence--based on the physical--che...
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ABSTRACT The Iberian Pyrite Belt (IPB), SW Spain, has been exploited since ancient times, and previous studies have compared different parameters in the Tinto and Odiel Rivers, the principal rivers that cross the IPB. We used classical... more
ABSTRACT The Iberian Pyrite Belt (IPB), SW Spain, has been exploited since ancient times, and previous studies have compared different parameters in the Tinto and Odiel Rivers, the principal rivers that cross the IPB. We used classical statistics to draw contrasts between the two rivers. Samples were collected at two sites, one in the Tinto River, and the other in the Odiel, immediately upstream of tidal influence. Both rivers are strongly contaminated by acid mine drainage (AMD). However, the results suggest a distinctive, although somewhat parallel, geochemical behavior. The pattern of affinity between parameters differs because in addition to AMD, the Odiel River receives important contributions from non-contaminated catchments, while the Tinto River is the main receptor of drainage from the Rio Tinto mine. The applied statistical approach revealed that pH and electrical conductivity present a similar temporal evolution, which point to an identical geochemical signature; this indicates that both systems are similarly affected by contamination from the same pyritic area.