Assessment of heavy metal contamination in the atmospheric deposition during 1950–2016 A.D. from a snow pit at Dome A, East Antarctica

Liu, Ke; Hou, Shugui; Wu, Shuangye; Zhang, Wangbin; Zou, Xiang; Yu, Jie; Song, Jian; Sun, Xiaoping; Huang, Renhui; Pang, Hongxi; Wang, Jiajia

doi:10.1016/j.envpol.2020.115848

Cited by 17 publications

(14 citation statements)

References 52 publications

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“…Potentially Toxic Elements can be transported over long distances through the atmospheric circulation, and eventually deposited through dry and wet deposition to the Antarctic regions (Bargagli, 2006(Bargagli, , 2008Trevizani et al, 2018;Liu et al, 2021). They were determined in fossil fuels contaminated soils in different regions of Antarctica (Padeiro et al, 2016;Smykla et al, 2018;Alekseev and Abakumov, 2020;Gran-Scheuch et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Polycyclic Aromatic Hydrocarbons and Potentially Toxic Elements in Soils of the Vicinity of the Bulgarian Antarctic Station “St. Kliment Ohridski” (Antarctic Peninsula)

Abakumov

Nizamutdinov

Yaneva

et al. 2021

Front. Environ. Sci.

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The investigation conducted was dialed to quantitative and qualitative evaluation of 15 priority polycyclic aromatic hydrocarbons (PAHs) and Potentially Toxic Elements (Cu, Pb, Zn, Cd, Ni, and Cr) is soils and cryoconites on “St. Kliment Ohridski” Antarctic station territory and its vicinities. Estimation of benzo(a)pyrene (BaP)–equivalents, PAHs and different PAHs isomer pair ratios were used for identification of general toxicity, nature and origin of individual PAHs and their groups. Total concentrations of PAHs in BaP–equivalents showed, that ∑15PAH of all selected points was higher than the threshold concentration (20 μg × kg−1–Russian environmental legislation) for benzo(a)pyrene. Different PAHs isomer ratios showed the natural (petrogenic) source of PAHs at all soils examples (except Cryosol Toxic Transportic). The maximum content among potentially toxic elements was recorded for Zn (75.7 mg × kg−1 at L26), the minimum for Cd (0.201 mg × kg−1 at L1A). Average concentrations of potentially toxic elements are generally lower compared to the results of previous studies. Application of Igeo index, characterizes the majority of the studied soils as unpolluted or practically unpolluted. Data obtained indicates that there is no current critical anthropogenic load on the environmental components of the landscapes investigated.

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Section: Introductionmentioning

confidence: 99%

Polycyclic Aromatic Hydrocarbons and Potentially Toxic Elements in Soils of the Vicinity of the Bulgarian Antarctic Station “St. Kliment Ohridski” (Antarctic Peninsula)

Abakumov

Nizamutdinov

Yaneva

et al. 2021

Front. Environ. Sci.

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“…Heavy metals are enriched in Antarctic sea ice owing to atmospheric circulations and anthropogenic impacts [16,17]. There are some reports about the participation of yeast MAPK pathway in metal stress.…”

Section: Discussionmentioning

confidence: 99%

“…Our experiments also indicated that yeast AN5 could survive and reproduce in high salinity of 120‰, and was more resistant compared to mesophilic yeasts (data not shown). Moreover, in the Antarctic ecosystems, besides the geochemical characteristics, the human activity and industrial emissions of heavy metals to the atmosphere, give a significant increase of some metals [16,17].The yeast strain AN5 has been observed strong tolerant to different concentrations of heavy metals, such as Cd, Pb, Mn, Cu, Cr and Hg [14]. All of these investigations prove that Antarctic yeast Rhodotorula mucilaginosa AN5 is cold-active yeast and behave some special properties that adapt to polar sea ice habitats.…”

Section: Introductionmentioning

confidence: 99%

Molecular cloning and sequence analysis of a mitogen-activated protein kinase gene in the Antarctic yeast Rhodotorula mucilaginosa AN5

Shi

Zhang

et al. 2021

Mol Biol Rep

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The mitogen-activated protein kinase (MAPK) cascades play important roles in various signaling transduction networks of biotic and abiotic stress responses. However, MAPK signaling pathways in cold-active yeast Rhodotorula mucilaginosa have not been reported comprehensively. In the present study, MAPK gene (RmMAPK) was first cloned and characterized from Antarctic sea ice yeast R. mucilaginosa AN5. The full length of the RmMAPK gene is 1086 bp and encodes a 361 amino acids protein with a predicted molecular mass of 40.9 kDa and a pI of 5.25. The RmMAPK contains 11 MAPK conserved subdomains and the phosphorylation motif TGY located in the activation loop of the kinase. Quantitative real-time PCR assay revealed that the expression of RmMAPK up-regulated rapidly and significantly when yeast cells were subjected to low temperature (4 °C ), high salinity (120‰ NaCl) and heavy metal (2 mmol/L CuCl2), which suggested that the RmMAPK might act as a key function in response to extreme stresses, such as low temperature, high salinity and heavy metal.

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“…Paralleled to these concerns, a recent study, unfortunately, reported the presence of pesticides and mercury in mosses, topsoil, and water in Antarctica (Subhavana et al 2019). Liu et al (2021) also studied the concentrations of some heavy metals (such as Al, Cr, Pb, Hg, and As) in soil samples collected in East Antarctica. Although the contamination level of these heavy metals was relatively low, the elevated levels of heavy metals compared to the baseline concentrations started to be alarming for this pristine continent (Xu et al 2020).…”

Section: Discussionmentioning

confidence: 99%

Risk of Heavy Metal Contamination in Krill Oils

Kizilirmak¹,

Aslan²,

Çetingül³

et al. 2021

Kocatepe Veterinary Journal

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Different omega-3 sources have been widely used as a portion of supplementary food in recent years. One of the popular sources of omega-3 fatty acids is krill oil. Thus, the aim of the current study was to examine the contents of commercially available krill oils sold in the markets. For this purpose, a total of 11 different krill oil brands randomly selected from different pharmacies. The chemical analysis was carried out in a laboratory accredited by the Turkish Accreditation Agency. Our results indicated that the fatty acid contents of the commercial krill oils tested varied to quite an extent, but within the tolerable limits in 10 out of 11 samples. The peroxide content of the samples differed from 10 to 30 meqO2/kg-oil. The mercury and cadmium levels were up to the standard limits set by Codex Alimentarius for food supplements. However, all products contained more than the tolerable limits of lead and only 1 sample had arsenic levels measured below acceptable limits. Thus, none of the krill oil samples provided the required European Union standards. It suggests that the manufacturers overlooked some issues while producing krill oils. This may pose a potential threat to public health in the long term.

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Assessment of heavy metal contamination in the atmospheric deposition during 1950–2016 A.D. from a snow pit at Dome A, East Antarctica

Cited by 17 publications

References 52 publications

Polycyclic Aromatic Hydrocarbons and Potentially Toxic Elements in Soils of the Vicinity of the Bulgarian Antarctic Station “St. Kliment Ohridski” (Antarctic Peninsula)

Polycyclic Aromatic Hydrocarbons and Potentially Toxic Elements in Soils of the Vicinity of the Bulgarian Antarctic Station “St. Kliment Ohridski” (Antarctic Peninsula)

Molecular cloning and sequence analysis of a mitogen-activated protein kinase gene in the Antarctic yeast Rhodotorula mucilaginosa AN5

Risk of Heavy Metal Contamination in Krill Oils

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