Spatiotemporal evaluation of water quality and risk assessment of heavy metals in the northern Caspian Sea bounded by Kazakhstan

Ramazanova, Elmira; Bahetnur, Yingkar; Yessenbayeva, Kadisha; Lee, Seung Hwan; Lee, Woojin

doi:10.1016/j.marpolbul.2022.113879

Cited by 9 publications

(4 citation statements)

References 40 publications

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“…On the other hand, an analysis of thousands of water samples, collected between 2014 and 2019 in several areas near the coast of Kazakhstan, concluded that the Caspian Sea was “fairly or marginally” polluted, with high levels of Cd and Pb concentrations, and extreme atypical values in the majority of the areas [ 58 ]. That coincides with the results obtained in our study, in which high Cd and Pb concentrations were found in the muscle tissue of all the fish analyzed.…”

Section: Resultsmentioning

confidence: 99%

Determination of the Heavy Metal Bioaccumulation Patterns in Muscles of Two Species of Mullets from the Southern Caspian Sea

Bakhshalizadeh

Mora-Medina

Fazio

et al. 2022

Animals

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Although fish is a food that supplies nutrients of a high biological value, they can also be a source of some harmful substances, such as heavy metals. In the same context, some human activities in the Caspian Sea have contaminated this ecosystem during the past few years. For those reasons, our objective consisted of determining the concentrations of heavy metals and evaluating their bioaccumulation patterns in the different types of musculature in two species of mullets of commercial interest, Chelon auratus and Chelon saliens, from the southern coast of this sea. For this purpose, 20 C. auratus and 29 C. saliens were caught off this coastline and the metal concentrations in 3 different muscle locations were analyzed: the ventral, dorsal and caudal muscles of each fish. The caudal muscle had higher concentrations of Cd, Cu, Pb, and Zn, whereas As, Hg and Ni accumulation seemed to be independent of the musculature type. Overall, the Cd, Hg, and Pb concentrations exceeded the maximum levels permitted in fish by the European Union. In addition, the relationships between pairs of metals were positive and elevated in all the cases, which could be a sign of heavy metal pollution in the region sampled. Therefore, it will be necessary to continue monitoring and evaluating the degree of pollution in the Caspian Sea.

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Section: Resultsmentioning

confidence: 99%

Determination of the Heavy Metal Bioaccumulation Patterns in Muscles of Two Species of Mullets from the Southern Caspian Sea

Bakhshalizadeh

Mora-Medina

Fazio

et al. 2022

Animals

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“…SF ingestion = SF dermal × ABS GI (6) where RFD is the reference dose by ingestion or dermal contact of the metal; ABS GI is the gastrointestinal absorbance factor; and SF is the slope factor defined for ingestion or dermal contact with the metal [28]. The Cancer Risk Index (RI) is calculated through the summation of CR individual values calculated for each heavy metal in the sand samples analysed [30].…”

Section: Health Risk Assessmentmentioning

confidence: 99%

Assessment of Heavy Metal Distributions in Sand Beaches in the Maltese Islands

2022

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This study focuses on the quantification of heavy metals present in 18 sand beaches on the islands of Malta and Gozo. A total of 134 samples were collected, digested using Aqua Regia, and analysed using flame AAS to find the concentration of six heavy metals. Concentrations obtained in descending order are: Sr > Fe > Mn > Pb > Zn > Cu. Using PCA, Fe and Mn resulted as homogenous distributions with a probable prevalent lithogenic origin. Pb is possibly dominantly anthropogenic, while Cu and Zn are of a mixed nature. Cluster analysis was used to prove the interaction between concentrations and different bays from where the samples were gathered. This showed that Ballut Reserve Bay and Rinella Bay in Malta and Marsalforn Bay in Gozo are amongst the bays most affected by heavy metal content. It has been observed that bays with higher heavy metal content lie in the same zones with the highest geological wear rate induced by sea waves. Health risk assessment undertaken for adults and children shows negligible effects of non-carcinogenic risk and cancer risk indices. Potential ecological risk computed for the concentrations obtained showed considerable Cu risk and a moderate Pb risk at the bays analysed, none of which are contaminated with these elements.

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“…Based on its geophysical conditions, this sea can be subdivided into three parts: the northern area with a maximum depth of 30 m and a salinity of below 10 g/L, and the middle and southern areas, with a salinity of nearly 13 g/L and depths of 800 and 1000 m, respectively (Kosarev 2005 ; Lattuada et al 2019 ). It is filled and drained mainly by the rivers Volga (233 km 3 /year) and Ural (6.6 km 3 /year), as well as the rainfall (Ramazanova et al 2022 ). The fact that it is closed makes its ecosystem less tolerant and more vulnerable to human-generated and spilled environmental pollutants (Ghayebzadeh et al 2020 ).…”

Section: Introductionmentioning

confidence: 99%

Aliphatic hydrocarbons in fin spines of adult sturgeon (Acipenser stellatus) and their relationship with potentially toxic elements in the northern and southern regions of the Caspian Sea

Bakhshalizadeh,

Nasibulina,

Kurochkina

et al. 2024

Environ Sci Pollut Res

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Currently, the pollution of the Caspian Sea by the oil industry is one of the highest problems in this area. Critically endangered species inhabit this sea, such as sturgeons, whose ecological value is incalculable. Thus, we aimed to evaluate the level of contamination of aliphatic hydrocarbons of petroleum and its relation with several toxic elements directly on sturgeons spines. A total of 40 adult starry sturgeons (Acipenser stellatus) were obtained within a repopulation programme in the northern and southern coastal waters of the Caspian Sea. The marginal pectoral fin was extracted from each fish to determine aliphatic hydrocarbons, arsenic, cadmium, mercury, nickel, lead, and vanadium. Subsequently, the sturgeons were released. Clearly, the presence of hydrocarbons was evidenced in all the sampled areas finding higher concentrations in the northern areas (N1 = 1.35 ± 0.4; N2 = 1.65 ± 0.46; N3 = 1.27 ± 0.40; S1 = 0.61 ± 0.22; S2 = 0.85 ± 0.43 mg/kg). Furthermore, to a greater or lesser extent, some toxic elements, mainly Hg and As, have been linked to aliphatic hydrocarbons.

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Spatiotemporal evaluation of water quality and risk assessment of heavy metals in the northern Caspian Sea bounded by Kazakhstan

Cited by 9 publications

References 40 publications

Determination of the Heavy Metal Bioaccumulation Patterns in Muscles of Two Species of Mullets from the Southern Caspian Sea

Determination of the Heavy Metal Bioaccumulation Patterns in Muscles of Two Species of Mullets from the Southern Caspian Sea

Assessment of Heavy Metal Distributions in Sand Beaches in the Maltese Islands

Aliphatic hydrocarbons in fin spines of adult sturgeon (Acipenser stellatus) and their relationship with potentially toxic elements in the northern and southern regions of the Caspian Sea

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