Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effect of arsenic contamination on geotechnical properties of clayey soil
https://orcid.org/0000-0001-8930-6599
Abstract Soil contamination by heavy metals is a severe problem worldwide because of its environmental impact and consequences on human health. Arsenic is one of the most prominent heavy metals found in contaminated sites. Since arsenate is strongly absorbed by organic matter and clays, its introduction into the soil mass can affect its geotechnical properties due to which its effects require immediate research. However, the literature review showed that there are very few studies based on this issue. Thus, in this paper, the impact of arsenic contamination on the geotechnical properties of montmorillonite clay soil was evaluated. After extensive laboratory testing, the results showed that arsenate contamination decreased the pH of the soil. It promoted a change in the soil’s structure which was observed through soil particle agglomeration. The soil classification suggested that the soil behaves in an expansive manner after contamination. The arsenate-soil interaction reduced 5% of the montmorillonite content and contributed to the decrease of the contaminated soil’s cohesion by 49%. In contrast, soil agglomeration increased the angle of frictional resistance by 125% compared with natural soil. Moreover, the soil–contaminant interaction enhanced the contribution of the osmotic suction to the shear strength of the arsenate-contaminated soil, compared to matric suction.
Effect of arsenic contamination on geotechnical properties of clayey soil
https://orcid.org/0000-0001-8930-6599
Abstract Soil contamination by heavy metals is a severe problem worldwide because of its environmental impact and consequences on human health. Arsenic is one of the most prominent heavy metals found in contaminated sites. Since arsenate is strongly absorbed by organic matter and clays, its introduction into the soil mass can affect its geotechnical properties due to which its effects require immediate research. However, the literature review showed that there are very few studies based on this issue. Thus, in this paper, the impact of arsenic contamination on the geotechnical properties of montmorillonite clay soil was evaluated. After extensive laboratory testing, the results showed that arsenate contamination decreased the pH of the soil. It promoted a change in the soil’s structure which was observed through soil particle agglomeration. The soil classification suggested that the soil behaves in an expansive manner after contamination. The arsenate-soil interaction reduced 5% of the montmorillonite content and contributed to the decrease of the contaminated soil’s cohesion by 49%. In contrast, soil agglomeration increased the angle of frictional resistance by 125% compared with natural soil. Moreover, the soil–contaminant interaction enhanced the contribution of the osmotic suction to the shear strength of the arsenate-contaminated soil, compared to matric suction.
Effect of arsenic contamination on geotechnical properties of clayey soil
https://orcid.org/0000-0001-8930-6599
Abstract Soil contamination by heavy metals is a severe problem worldwide because of its environmental impact and consequences on human health. Arsenic is one of the most prominent heavy metals found in contaminated sites. Since arsenate is strongly absorbed by organic matter and clays, its introduction into the soil mass can affect its geotechnical properties due to which its effects require immediate research. However, the literature review showed that there are very few studies based on this issue. Thus, in this paper, the impact of arsenic contamination on the geotechnical properties of montmorillonite clay soil was evaluated. After extensive laboratory testing, the results showed that arsenate contamination decreased the pH of the soil. It promoted a change in the soil’s structure which was observed through soil particle agglomeration. The soil classification suggested that the soil behaves in an expansive manner after contamination. The arsenate-soil interaction reduced 5% of the montmorillonite content and contributed to the decrease of the contaminated soil’s cohesion by 49%. In contrast, soil agglomeration increased the angle of frictional resistance by 125% compared with natural soil. Moreover, the soil–contaminant interaction enhanced the contribution of the osmotic suction to the shear strength of the arsenate-contaminated soil, compared to matric suction.
Effect of arsenic contamination on geotechnical properties of clayey soil
Vásquez-Nogal, Ismael (Autor:in) / Hernández-Mendoza, Christian E. (Autor:in)
2022
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
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