Silvia ELISA Ratto

• University of Buenos Aires

Closed landfills need after-closure rehabilitation. The chosen option should ensure greenhouse gases release, from the landfill, is not promoted once settled. The objective of this study was to estimate and confront, during different seasons, CH4, CO2 and N2O emissions under three vegetation covers in a closed landfill in Buenos Aires, Argentina. C...

Research on grapevines has indicated that organic amendment application (OAA) increases the nutrient content of soil and plant tissue. Microbial functional groups are extensively used as soil fertility indicators because they are highly sensitive to changes in climatic and management conditions and they accurately represent entire biological proces...

A site evaluation was conducted on a landfill of dredged sediment from the Reconquista River on top of a geomembrane with spontaneous willow tree vegetation. Sediment samples were taken up to a depth of 1 m, and were analyzed for potential contaminant presence as well as soil variables. The results showed an incipient pedogenesis and presence of Cd...

A site evaluation was conducted on a landfill of dredged sediment from the Reconquista River on top of a geomembrane with spontaneous willow tree vegetation. Sediment samples were taken up to a depth of 1 m, and were analyzed for potential contaminant presence as well as soil variables. The results showed an incipient pedogenesis and presence of Cd...

Education for sustainable development should be based on proper environmental management. The general objective of this study is to highlight key aspects of environmental education, with specific objectives. Inclusive education addresses the learning needs with a focus on those who are vulnerable to marginalization and exclusion. Ethics plays a vit...

Landfilling of yard trimmings is no good for many reasons. Landfill's space is scarce and yard trimmings occupy a lot of it. When buried, yard trimmings decompose in anaerobic conditions so they emit methane to the atmosphere increasing global warming. Finally, if we bury this biomass we are missing the opportunity to make compost. Objective: to co...

The purpose of this work is to apply remedial technology to weathered sediments disposed on geomembrane with a site-specific remediation goal. A column leaching test was carried out; treatments were: compost, calcium carbonate and control. Concentrations found in soil pore water of Al (4830-18000 µg L-1); Ni (240-770 µg L-1) and Cd (120-240 µg L-1)...

Soil samples were taken at various depths up to 100 cm to characterize soil environment, on polluted sediments dredged from Reconquista River and disposed near a residential neighbourhood and an industrial area. Some soil quality properties were measured. The results showed: soil density (1,7-2,16 g cm-3), bulk density (0,77-1,29 g cm-3), total soi...

Acidification of dredged sediments which have been disposed on land is highly dependent on redox shifts. The aim of the present work was to assess changes in sulphur, metal speciation (Zn, Fe, Cr y Cu) and acidity caused by a polluted sediment oxidation event. Sediments were dessicated under controlled conditions and sulphide compounds (acid volati...

RESUMEN El contenido total de un nutriente en el suelo es importante para conocer la fertilidad potencial para la nutrición vegetal y constituye una información básica en estudios ambientales y edafogenéticos. El objetivo de este trabajo fue determinar el contenido «pseudototal» de Cu, Zn, Fe y Mn en suelos de la llanura chaco-pampeana de Córdoba,...

Data on the total nutrient content of soils is essential for assessing potential fertility and is fundamental to environmental and edaphogenetic studies. The aim of this paper was to measure Cu, Zn, Fe y Mn in soils of the Chaco Pampean Plain in Argentina using the simultaneous acid nitric (HNO3 4 M) extraction procedure (called pseudototal) to inf...

Acidification of dredged sediments which have been disposed on land is highly dependent on redox shifts. The aim of the present work was to assess changes in sulphur, metal speciation (Zn, Fe, Cr y Cu) and acidity caused by a polluted sediment oxidation event. Sediments were dessicated under controlled conditions and sulphide compounds (acid volati...

Population environmental education must be conveye in all educational levels, in order to contribute to a deep knowledge of environmental protection laws. These include contents about environmental education, but with scarce diffusion and low adhesion. If environmental education could force a detailed knowledge about regulations, its application co...

Background, Aim and ScopeSediments act as a sink for toxic substances (heavy metals, organic pollutants) and, consequently, dredged materials often contain pollutants which are above safe limits. In polluted anaerobic sediments, the presence of sulphides and redox potential changes creates a favorable condition for sulphide oxidation to sulphate, r...

Pit-water from an Uranium (U) mine in San Rafael, Argentina, was applied to soil columns in a short-term experiment to evaluate retention of U. The mine soil was coarse-textured, with pH(KCl) 7.7 and a carbonate content of 6%, which may favour the formation of uranyl-carbonates. Triple superphosphate (TSP) and ground plant material were added as am...

Cu, Zn, Fe and Mn DTPA extractable content and it relationship with organic matter, pH, salinity and lime were studied in 48 soils (Mollisol, Entisol and Alfisol) from some geomorphic regions of the Chaco-Pampean plain of Cordoba (Argentina). Soils ranged from silty loam to loamy sandy texture, weak acidity to strong alcalinity, and low to medium s...

Cu, Zn, Fe and Mn DTPA extractable content and it relationship with organic matter, pH, salinity and lime were studied in 48 soils (Mollisol, Entisol and Alfisol) from some geomorphic regions of the Chaco-Pampean plain of Cordoba (Argentina). Soils ranged from silty loam to loamy sandy texture, weak acidity to strong alcalinity, and low to medium s...

Pit-water from an Uranium (U) mine in San Rafael, Argentina, was applied to soil columns in a short-term experiment to evaluate retention of U. The mine soil was coarse-textured, with pH (KCl) 7.7 and a carbonate content of 6%, which may favour the formation of uranyl-carbonates. Triple superphosphate (TSP) and ground plant material were added as a...

Urban and periurban agriculture may imply risks for human health if it is not appropriately conducted. The objective of this contribution was to present a survey of heavy metal content in horticultural soils of Buenos Aires. The information is compared to national and international quality standards, and enrichment factors for heavy metals were cal...

Urban and periurban agriculture may imply risks for human health if it is not appropriately conducted. The objective of this contribution was to present a survey of heavy metal content in horticultural soils of Buenos Aires. The information is compared to national and international quality standards, and enrichment factors for heavy metals were cal...

An evaluation of soils from a coastline sector of the Riachuelo River, in Buenos Aires City, was carried out. Superficial soil samples (0-25 cm depth) were taken on perpendicular transects from the river to inland, and analyzed to identify organic and inorganic contaminants. Ranges of values for metals were: 1-5 mg/kg for cadmium, 4-23 mg/kg for ar...

Different extraction solution (DTPA, EDTA, Wolf, Mehlich 1 and 0.1 M HCl) for copper, zinc, manganese and iron extraction from 24 loessic Haplustolls of Córdoba, Argentina, were investigated. Soil properties influenced the extraction, mainly sand content and pH. EDTA and DTPA resulted the best solutions, because they extracted the four elements at...

During last years spatial distribution of soil properties has demanded a considerable investigation effort. The site specific recommendation and a more intelligent use of the resources have raised the need for knowing field-scale variability of soil properties. Soil spatial variability is related to parent material, soil formation process and posit...

Heavy metal soil content was measured in a Tucuman Hapludol after two consecutive years of biosolids application. Total Cd, Cr, Cu, Ni, Pb, Zn soil contents were measured at 0-10cm, 10-20cm and 20-30 cm depths. Three doses of biosolids were surface applied at 0, 3.5 and 10 Mg ha-1. The biosolid was obtained from a treatment plant and was irradiated...

The influence of some soil properties on hot 0.02 M calcium chloride (CaCl2) extractable boron in the Argentine Pampas was studied. The selected soils represent an extensive area in the middle west of the country where most of the grain crops are produced. Soils have all developed on loess and cover a wide range of organic matter, pH, and exchangea...

The objective of this paper was to evaluate the level of heavy metals in a suburban soil affected by periodical floodings, in Northern Buenos Aires City. Monthly sampling of top soils between December and April showed contamination with Cd, Pb, and Hg, probably originated from uncontrolled industrial discharges into the river basin without pretreat...

The evaluation of the potentiality of underground aquifers which are used for complementary irrigation, primarily involves the geophysical exploration which makes a description of their dimensions, location and inference of water quality. The geoelectrical prospecting is most widely used for this purpose and the precision in the interpretation of t...

Sustainability of conventional agriculture is based upon a high input of agrochemicals, such as phosphate fertilizers. Conventional inorganic phosphorus fertilizers may cause an inadvertent addition of heavy metals, which are contained as impurities. Fertilizers commonly used in Argentina were analyzed to determine concentrations of chromium, cadmi...

A spatial variability study of micronutrients was conducted in a Typic Argiudoll of Argentine corn belt to establish an optimum sampling design. Cu, Zn, Fe and Mn were determined in soil and maize using two different scales: an entire plot of 16 ha and a single ha in the center of the plot. The parameters indicating spatial variability and optimum...

Plant samples were taken at silking from the leaf below and opposite to the ear. Nutrient variability in soil was affected by scale: greater surface required more samples except for copper. For plants scale it did not affect zone and manganese content. Required sample number was always lower for soils except for zonc.

Se estudió la variabilidad espacial de P extractable. P adsorbido y P en planta en un cultivo de maíz. En dos escalas de muestreo:una unidad de 16 ha representada por un potrero,y una hectárea dentro del mismo.considerando un total de 100 muestras de suelo e igual cantidad de muestras vegetales. La variable que presentó mayor variabilidad espacial...

Assessment of organic and inorganic pollution in an alluvial soil of the Riachuelo River, Buenos Aires, Argentina: An evaluation of soils from a coastline sector of the Riachuelo River, in Buenos Aires City, was carried out. Superficial soil samples (0-25 cm depth) were taken on perpendicular transects from the river to inland, and analyzed to iden...

-1 . The biosolid was obtained from a treatment plant and was irradiated with 3 kGy for disinfecting. Cu, Pb, Zn, and Ni contents increased significantly up to 10 cm depth with the lower dose and up to 20 cm with the higher one. Cr and Cd did not change. While Environmental Protection Agency (EPA) rules indicate that Pb would be limiting after 85 y...

RESUMEN La educación ambiental de la población debe ser transmitida en todos los niveles educativos, de modo que contribuya a un profundo conocimiento de las leyes de protección ambiental existentes. Estas últimas incluyen muchas veces contenidos acerca de la educación ambiental, con escasa difusión y bajo cumplimiento. Si la educación ambiental ga...