247 research outputs found
Determination of the bioaccessible fraction of cupric oxide nanoparticles in soils using an in vitro human digestibility simulation
Chapter 6 Site investigation
In this chapter we discuss the various phases in site investigation. Phase I investigations are preliminary in nature and are designed to furnish a comprehensive overview of available site information. Phase II investigations consist of site characterization and groundwater monitoring of well installation. Direct methods such as boreholes, piezometers, and geotechnical analysis of soil samples are discussed. While, for indirect methods, we discuss aerial photography, ground penetrating radar, and earth conductivity and resistivity geophysical studies. Furthermore, we discuss issues related to hydrogeochemical investigations. Then, we conclude this chapter with two case studies. The first is related to geoenvironmental investigation at a waste dump site in the United Arab Emirates, while the second is related to the assessment of land salinization in arid lands
Regulatory considerations for the potential development and application of metal cleanup values
Quantitative-spatial assessment of soil contamination in S. Francisco de Assis due to mining activity of the Panasqueira mine (Portugal)
Through the years, mining and beneficiation processes produces large amounts of As-rich mine wastes laid up in huge tailings and open-air impoundments
(Barroca Grande and Rio tailings) that are the main source of pollution in the surrounding area once they are exposed to the weathering conditions leading to
the formation of AMD and consequently to the contamination of the surrounding environments, in particularly soils. In order to investigate the environmental
contamination impact on S. Francisco de Assis (village located between the two major impoundments and tailings) agricultural soils, a geochemical survey was
undertaken to assess toxic metals associations, related levels and their spatial distribution, and to identify the possible contamination sources. According to
the calculated contamination factor, As and Zn have a very high contamination factor giving rise to 65.4 % of samples with a moderate to high pollution
degree; 34.6 % have been classified as nil to very low pollution degree. The contamination factor spatial distribution put in evidence the fact that As, Cd, Cu,
Pb, and Zn soils contents, downstream Barroca Grande tailing, are increased when compared with the local Bk soils. The mechanical dispersion, due to
erosion, is the main contamination source. The chemical extraction demonstrates that the trace metals distribution and accumulation in S. Francisco de Assis
soils is related to sulfides, but also to amorphous or poorly crystalline iron oxide phases. The partitioning study allowed understanding the local chemical
elements mobility and precipitation processes, giving rise to the contamination dispersion model of the study area. The wind and hydrological factors are
responsible for the chemical elements transport mechanisms, the water being the main transporter medium and soils as one of the possible retention media
Linking incineration to dioxins and furans in lakebed sediments (or, the case of the missing water license condition)
Deriving site‐specific clean‐up criteria to protect ecological receptors (plants and soil invertebrates) exposed to metal or metalloid soil contaminants via the direct contact exposure pathway
Evaluating Polymeric Sampling as a Tool for Predicting the Bioaccumulation of Polychlorinated Biphenyls by Fish and Shellfish
Optimal Environmental Monitoring System for Ecosystem Assessment in the Geum River Estuary, Korea
Dataset on water quality characteristics of a hill stream in Bhaderwah, Jammu and Kashmir
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