Study on Resistance  and Non-Resistance  parts of copper, cadmium, lead and mercury metals based on the sequential extraction method in the surface sediments of the southern basin of the Caspian Sea.

Rezaei, Maryam; Nasrollahzadeh Saravi, Hassan; Younesipour, Hourieh; Firouzkandian, Sharareh; Rashidi Golrooye, Marzieh

doi:10.22034/KJES.2024.10.1.107261

Volume 10, Issue 1 (Spring & Summer 2024) KJES 2024, 10(1): 265-277 | Back to browse issues page

‎ 10.22034/KJES.2024.10.1.107261

Research code: 0-76-12-048-971339

Mendeley

Zotero

RefWorks

Rezaei M, Nasrollahzadeh Saravi H, Younesipour H, Firouzkandian S, Rashidi Golrooye M. Study on Resistance and Non-Resistance parts of copper, cadmium, lead and mercury metals based on the sequential extraction method in the surface sediments of the southern basin of the Caspian Sea.. KJES 2024; 10 (1) :265-277
URL: http://gnf.khu.ac.ir/article-1-2906-en.html

Study on Resistance and Non-Resistance parts of copper, cadmium, lead and mercury metals based on the sequential extraction method in the surface sediments of the southern basin of the Caspian Sea.

Maryam Rezaei¹

, Hassan Nasrollahzadeh Saravi ^*

², Hourieh Younesipour¹

, Sharareh Firouzkandian¹

, Marzieh Rashidi Golrooye¹

1- Caspian Sea Ecology Research Center (CSERC), Iranian Fisheries Science Research Institute (IFSRI)
2- Caspian Sea Ecology Research Center (CSERC), Iranian Fisheries Science Research Institute (IFSRI) , hnsaravi@gmail.com

Abstract: (41 Views)

Heavy metals are among the pollutants that cause many problems for aquatic organisms and, ultimately, for humans in aquatic ecosystems. Sediments serve as a reservoir for metal pollutants from both natural and anthropogenic sources. Therefore, the purpose of this study is to investigate the concentrations of both resistant and non-resistant forms of the metals Cu, Cd, Pb, and Hg in surface sediments at depths of 10 and 30 meters along eight transects from the fall and winter of 2018 to the spring and summer of 2019 in the southern Caspian Sea. The results showed that the mean concentration (±SE) of Cu, Pb, Cd (mg/kg dw), and Hg (µg/kg dw) in the resistant fraction were (17.08 ± 1.37), (867.80 ± 8.96), (4.82 ± 0.64), and (5.42 ± 0.05), while the non-resistant fractions were (3.09 ± 0.66), (22.80 ± 1.23), (9.70 ± 0.16), and (8.13 ± 0.05), respectively. When comparing the concentrations of non-resistant forms accessible to living organisms with international standards, it was found that the concentrations of Cu and Hg were lower than the standards, while the concentrations of Pb and Cd slightly exceeded the international standards, suggesting a man-made origin for Pb and Cd. The results of measuring heavy metals in sediments indicated that the contribution of anthropogenic sources to the origin of these metals is greater than that from natural and geochemical sources.

Keywords: Metal pollutants, Surface sediments, Sequential extraction technique, Caspian Sea, Iran.

Full-Text [PDF 1381 kb] (13 Downloads)

Type of Study: Original Research | Subject: Environmental Geology
Received: 2024/07/10 | Accepted: 2024/09/10 | Published: 2024/04/29