Assessment of the Potential Ecological Risk With Heavy Metals in Surface Sediments From Accumulation Lakes on the Sector Inferior of the Olt River

Iordache, Mihaela; Popescu, Luisa Roxana; Pascu, Luoana Florentina; Iordache, Ioan

doi:10.21698/simi.2015.0020

Cited by 2 publications

(1 citation statement)

References 9 publications

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“…The geoaccumulation index (I geo ) ( Table 8) was introduced by Müller [46] and is widely used [15,47,48] to determine the pollution degree with heavy metal in surface sediments:…”

Section: Estimation the Pollution Degree By Pollution Indexesmentioning

confidence: 99%

Spatio-Temporal Evolution of Sediments Pollution with Mobile Heavy Metals in an Abandoned Mining Area from Romania

Kim¹,

Vasile²,

Pascu³

et al. 2018

Sedimentation Engineering

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The present chapter focuses on spatio-temporal evolution of sediments pollution with mobile heavy metals in five sampling campaigns, in an abandoned gold-bearing mining area from Certeju de Jos, Hunedoara County. The investigated zone is situated in a region where for a long period intense activities of mining exploitation was conducted. For determination of total metals content, sediment samples were dissolved with ultrapure nitric acid to microwave digestion. For the determination of mobile metals concentrations, it used the first step of BCR 701 sequential extraction scheme in a modified form, by reducing the extraction time from 16 hours to 20 minutes by sonication. The total and mobile concentrations of metals were determined by using ICP-MS. The concentrations of the mobile fractions of Cd, As and Cu are between 60 and 98% for Cd, 10 and 38% for As and up to 44% for Cu, indicating their presence in a bioavailable form. Due to the high mobility, these metals can pass from sediment to surface water and, implicitly, to the aquatic ecosystems. The pollution indices, calculated for the total content of As, Cd, Cu, Ni and Pb, indicate the presence of a strong environmental risk of sediment degradation in most investigated site.

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“…The geoaccumulation index (I geo ) ( Table 8) was introduced by Müller [46] and is widely used [15,47,48] to determine the pollution degree with heavy metal in surface sediments:…”

Section: Estimation the Pollution Degree By Pollution Indexesmentioning

confidence: 99%

Spatio-Temporal Evolution of Sediments Pollution with Mobile Heavy Metals in an Abandoned Mining Area from Romania

Kim¹,

Vasile²,

Pascu³

et al. 2018

Sedimentation Engineering

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show abstract

Climate change extreme and seasonal toxic metal occurrence in Romanian freshwaters in the last two decades—case study and critical review

et al. 2022

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The relationship between metal levels in the Olt River ecosystem in southern Romania (measured during 2018‒2019, with 1064 sediment and water samples) and daily climate data were explored to assess the need for targeted source identification and mitigation strategies. In 2018, there was a strong relationship between the sediment Pb, As, Cd, and Hg contents and temperature (r > 0.8, p < 0.001). Mercury in sediments had a positive correlation with precipitation, and Hg in the water correlated with minimum temperature in May 2018 (p < 0.01). In July 2019, heavy metals were positively correlated with precipitation and negatively correlated with temperature. According to nonsymmetrical correspondence analysis, the four climate parameters analyzed were linearly correlated with the frequency of metal detection (p < 0.001) in both years. The statistical analysis showed strong relationships between heavy metal levels and climatic factors and attributed the discrepancies in elemental concentrations between 2018 and 2019 to climate warming.

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Assessment of the Potential Ecological Risk With Heavy Metals in Surface Sediments From Accumulation Lakes on the Sector Inferior of the Olt River

Cited by 2 publications

References 9 publications

Spatio-Temporal Evolution of Sediments Pollution with Mobile Heavy Metals in an Abandoned Mining Area from Romania

Spatio-Temporal Evolution of Sediments Pollution with Mobile Heavy Metals in an Abandoned Mining Area from Romania

Climate change extreme and seasonal toxic metal occurrence in Romanian freshwaters in the last two decades—case study and critical review

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