Non-corresponding contaminants in marine surface sediments as a factor of ARGs spread in the Sea of Azov

Сазыкина, М. А.; Барабашин, Т. О.; Konstantinova, Elizaveta; Al-Rammahi, A.A.K.; Павленко, Л. Ф.; Khmelevtsova, Lyudmila; Karchava, Shorena; Klimova, Maria; Mkhitaryan, Irina; Khammami, Margarita; Сазыкин, И. С.

doi:10.1016/j.marpolbul.2022.114196

Cited by 4 publications

(3 citation statements)

References 103 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Assessments of bottom sediments in the SoA reported potentially toxic element concentrations to either not or barely exceed maximum permissible concentrations [ 58 , 59 ]. However, the effectiveness of sediment and water quality guidelines in safeguarding humans has been called into question [ 60 ].…”

Section: Resultsmentioning

confidence: 99%

“…Using the method by Ethier et al[30], a residence time of 3.2 years for Hg loadings was computed, which underestimates the turnover reported byKorablina et al [4]. This might be affected by the high surface gas evasion rates.Assessments of bottom sediments in the SoA reported potentially toxic element concentrations to either not or barely exceed maximum permissible concentrations[58,59]. However, the effectiveness of sediment and water quality guidelines in safeguarding hu-…”

mentioning

confidence: 99%

See 1 more Smart Citation

Mercury Dynamics in the Sea of Azov: Insights from a Mass Balance Model

Gade,

von Hellfeld,

Mbadugha

et al. 2024

Toxics

View full text Add to dashboard Cite

The Sea of Azov, an inland shelf sea bounding Ukraine and Russia, experiences the effects of ongoing and legacy pollution. One of the main contaminants of concern is the heavy metal mercury (Hg), which is emitted from the regional coal industry, former Hg refineries, and the historic use of mercury-containing pesticides. The aquatic biome acts both as a major sink and source in this cycle, thus meriting an examination of its environmental fate. This study collated existing Hg data for the SoA and the adjacent region to estimate current Hg influxes and cycling in the ecosystem. The mercury-specific model “Hg Environmental Ratios Multimedia Ecosystem Sources” (HERMES), originally developed for Canadian freshwater lakes, was used to estimate anthropogenic emissions to the sea and regional atmospheric Hg concentrations. The computed water and sediment concentrations (6.8 ng/L and 55.7 ng/g dw, respectively) approximate the reported literature values. The ongoing military conflict will increase environmental pollution in the region, thus further intensifying the existing (legacy) anthropogenic pressures. The results of this study provide a first insight into the environmental Hg cycle of the Sea of Azov ecosystem and underline the need for further emission control and remediation efforts to safeguard environmental quality.

show abstract

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

Mercury Dynamics in the Sea of Azov: Insights from a Mass Balance Model

Gade,

von Hellfeld,

Mbadugha

et al. 2024

Toxics

View full text Add to dashboard Cite

show abstract

“…Using the E. coli RecA::luxCDABE bioreporter, the genotoxicity of chromiumcontaminated soils and seawater contaminated with crude oil after the Jiaozhou Bay spill was studied [14]. Whole-cell bacterial lux-biosensors based on the E. coli MG1655 strain with various inducible promoters were used to monitor the genotoxicity of the Don River bottom sediments (Russia) [15], wastewaters of Rostov-on-Don and Munich [16], bottom sediments of the Sea of Azov [17], and soils of various types of land use [18]. The review carried out by Bazhenov [19] systematizes the information on the use of whole-cell bacterial lux biosensors based on various bacterial strains, including their use in ecotoxicological environmental studies.…”

Section: Introductionmentioning

confidence: 99%

Biosensor-Based Assessment of Pesticides and Mineral Fertilizers’ Influence on Ecotoxicological Parameters of Soils under Soya, Sunflower and Wheat

Khmelevtsova,

Klimova,

Karchava

et al. 2024

Chemosensors

Self Cite

View full text Add to dashboard Cite

Pesticides and fertilizers used in agriculture can negatively affect the soil, increasing its toxicity. In this work, a battery of whole-cell bacterial lux-biosensors based on the E. coli MG1655 strain with various inducible promoters, as well as the natural luminous Vibrio aquamarinus VKPM B-11245 strain, were used to assess the effects of agrochemical soil treatments. The advantages of using biosensors are sensitivity, specificity, low cost of analysis, and the ability to assess the total effect of toxicants on a living cell and the type of their toxic effect. Using the V. aquamarinus VKPM B-11245 strain, the synergistic effect of combined soil treatment with pesticides and mineral fertilizers was shown, which led to an increase in the overall (integral) toxicity of soils higher than that of the individual application of substances. Several probable implementation mechanisms of agrochemical toxic effects have been discovered. DNA damage caused by both SOS response induction and alkylation, oxidative stress due to increased superoxide levels, and damage to cellular proteins and membranes are among them. Thus, the usage of biosensors makes it possible to assess the cumulative effect of various toxicants on living organisms without using expensive chemical analyses.

show abstract