Scholarlink

<p>Geochronological reconstruction of environmental parameters is an effective method for studying processes related to climatic and anthropogenic factors. To this end, sediment cores were collected in August 2022 from Grønfjorden in the Svalbard archipelago. The bottom sediment layers were dated using the excess <sup>210</sup>Pb method, covering a period of up to 150&#xa0;years. The concentrations of heavy metals (11 elements) and the activity concentrations of <sup>137</sup>Cs were measured for each layer. Additionally, the change in the distribution coefficient (<i>K</i><sub><i>d</i></sub>s) of cesium between water and bottom sediments was examined in relation to the granulometric composition of the sediment. The study found a direct proportional relationship between the <i>K</i><sub><i>d</i></sub>s value and the content of the pelite fraction (&lt; 0.01&#xa0;mm) and an inverse relationship with the aleurite content (0.01–0.05&#xa0;mm). The highest levels of <sup>137</sup>Cs in water, as reconstructed using time-varying <i>K</i><sub><i>d</i></sub>s, were 11 ± 4&#xa0;Bq&#xa0;m<sup>−3</sup> between 1985 and 1995. The IAEA’s recommended <i>K</i><sub><i>d</i></sub>s values were utilized to calculate the concentrations of heavy metals in the water. For the first group of elements, which includes As, Pb, Fe, Zn, Co, and V, the concentrations in the water varied by ± 10%. The second group, consisting of Cd, Hg, Cu, and Mn, exhibited significant variations in their values. Peaks of Cd and Hg were recorded from the onset of coal mining until the beginning of World War II. The concentration of copper in the water increased after coal mining resumed.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

A reconstruction of radioactive and chemical pollution of the Grønfjorden (bay), West Spitsbergen Island (Svalbard archipelago)

  • 期刊论文

  • 发表日期：

    2025年4月29日

查看全文
  • Alexey Anatolievich Namyatov,
  • Irina Sergeevna Usyagina,
  • Nikita Igorevich Meshcheriakov,
  • Natalya Sergeevna Ivanova,
  • Victor Victorovich Boyko

摘要

Geochronological reconstruction of environmental parameters is an effective method for studying processes related to climatic and anthropogenic factors. To this end, sediment cores were collected in August 2022 from Grønfjorden in the Svalbard archipelago. The bottom sediment layers were dated using the excess 210Pb method, covering a period of up to 150 years. The concentrations of heavy metals (11 elements) and the activity concentrations of 137Cs were measured for each layer. Additionally, the change in the distribution coefficient (Kds) of cesium between water and bottom sediments was examined in relation to the granulometric composition of the sediment. The study found a direct proportional relationship between the Kds value and the content of the pelite fraction (< 0.01 mm) and an inverse relationship with the aleurite content (0.01–0.05 mm). The highest levels of 137Cs in water, as reconstructed using time-varying Kds, were 11 ± 4 Bq m−3 between 1985 and 1995. The IAEA’s recommended Kds values were utilized to calculate the concentrations of heavy metals in the water. For the first group of elements, which includes As, Pb, Fe, Zn, Co, and V, the concentrations in the water varied by ± 10%. The second group, consisting of Cd, Hg, Cu, and Mn, exhibited significant variations in their values. Peaks of Cd and Hg were recorded from the onset of coal mining until the beginning of World War II. The concentration of copper in the water increased after coal mining resumed.