Predicted aquatic and human health risks associated with the presence of metals in the Syr Darya and Shardara Reservoir, Kazakhstan

Allen, DG; Kolok, Alan S.; Snow, Daniel D.; Satybaldiyev, B.; Uralbekov, Bolat; Nystrom, G.S.; Hampton, Leah M. Thornton; Bartelt-Hunt, S.L.; Jeffries, Marlo K. Sellin

doi:10.1016/j.scitotenv.2022.159827

Cited by 4 publications

(3 citation statements)

References 28 publications

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“…The concentrations of Hg were below detection limits in both the Syr Darya River and the small Aral Sea region and thus below the WHO guideline level for Hg (6.0 µg/L) [44]. Cd and Pb were detected in the Syr Darya river and, at some locations, the Cd and Pb concentrations [9,45,46] exceeded the WHO guideline levels (3.0 and 10 µg/L, respectively) [44]. According to previous Kazakhstan Ministry of Ecology, Geology, and Natural Resources reports, the Syr Darya water in the Turkestan and Kyzylorda regions is only suitable for irrigation and industrial uses [47].…”

Section: Distribution Of Toxic Metals In the Water Of Rivers Lakes An...mentioning

confidence: 99%

“…The levels of Hg in fish (roach and perch) from the Intumak Reservoir, which is located on the Nura River, also exceeded the permissible level [64]. The concentrations of Pb in roach muscle tissue from the Shardara Reservoir, situated in the southeastern part of the Kyzylkum desert, along the river Syr Darya, ranged from 0.1 to 3.8 µg/g wet weight [45].…”

Section: Occurrence Of Toxic Metals In Fish and Seafood In Central Asiamentioning

confidence: 99%

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Fish and Seafood Safety: Human Exposure to Toxic Metals from the Aquatic Environment and Fish in Central Asia

Zhuzzhassarova,

Azarbayjani,

Zamaratskaia

2024

IJMS

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Toxic metals that are released into aquatic environments from natural and anthropogenic sources are absorbed by aquatic organisms and may threaten the health of both aquatic organisms and humans. Despite this, there have been limited studies on the metal concentrations in fish and humans in Central Asia. This study summarizes the presence of the toxic metals arsenic (As), mercury (Hg), cadmium (Cd), and lead (Pb) in aquatic bodies, fish, and seafood products and conducts a risk assessment. While certain areas show a notable increase in fish and seafood consumption, the overall intake in Central Asia remains below recommended levels. However, in regions with high fish consumption, there is a potential for elevated exposure to toxic metals, especially Hg. The risk of exposure to toxic metals in fish and seafood in Central Asia emerges as a significant concern. Comprehensive monitoring, regulation, and remediation efforts are imperative to ensure the safety of water sources and food consumption in the region. Public awareness campaigns and the establishment of dietary guidelines play a crucial role in minimizing the health risks associated with consumption.

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Section: Distribution Of Toxic Metals In the Water Of Rivers Lakes An...mentioning

confidence: 99%

Section: Occurrence Of Toxic Metals In Fish and Seafood In Central Asiamentioning

confidence: 99%

Fish and Seafood Safety: Human Exposure to Toxic Metals from the Aquatic Environment and Fish in Central Asia

Zhuzzhassarova,

Azarbayjani,

Zamaratskaia

2024

IJMS

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“…Purifying polluting water environments in industrial areas remains one of the urgent tasks facing chemists, engineers, and ecologists. Several works have reported contaminants in many aquatic systems of Central Asia, including heavy metals and polychlorinated biphenyls (PCBs, anthropogenic persistent non-biodegradable organochlorine compounds resulting from several industrial activities being among the most prevalent and notorious pollutants found in environmental media) [2][3][4][5]. Contaminants of emerging concern (CECs), persistent chemicals, microorganisms and other substances pose a potential, perceived, or real risk to the environment and/or human health.…”

Section: Introductionmentioning

confidence: 99%

Wastewater Treatment in Central Asia: Treatment Alternatives for Safe Water Reuse

Kalmakhanova,

Diaz de Tuesta,

Malakar

et al. 2023

Sustainability

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Due to water scarcity and ready availability, treated wastewater in Central Asia is increasingly reused and seen as a valuable resource, requiring effective management with particular care for human health, environmental protection, and water security. Due to limited technical and economic support and poorly developed regulatory systems, many cities have inadequate wastewater treatment infrastructure. Improved wastewater effluent management is paramount due to its relationship with surface and groundwater quality used for drinking and agricultural irrigation. This paper presents a brief review of the published literature reporting on current wastewater treatment technologies and effluent composition, with particular attention paid to reuse needs. The impact of these practices on water quality is further assessed from information and reports gathered from various sources on the quantity and quality of surface waters and groundwaters. Finally, alternatives to current wastewater treatment practices in Central Asia will be explored with a particular emphasis on the removal of contaminants of emerging concern, including biological treatment systems, adsorption, advanced oxidation processes, and managed/unmanaged aquifer recharge techniques based on permeable reactive barriers, aiming to increase the availability and quality of surface waters and groundwaters for safe water reuse.

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Bioaccessibility-corrected probabilistic health risk assessment of dietary metal(loid) exposure in six major food groups in children from Northwest China

Wang,

Zhang,

Feng

et al. 2024

Environ Sci Eur

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Dietary exposure to heavy metals and metalloids [metal(loid)s] deserves increased attention; however, there is a lack of a comprehensive understanding of the risks of dietary exposure from multi-type food intake and multi-metal(loid) exposure using a bioaccessibility-corrected method. Here, we determined the concentration and bioaccessibility of six toxic metal(loid)s in six major food groups in an industrial city with intensive smelting activity. By incorporating children’s dietary patterns, the probability distribution of health risks from dietary metal(loid)s exposure was assessed. Marked differences were observed in the dietary exposure characteristics within metal(loid)s and major food groups. Cereal and vegetables were the major food groups local children intake. Cereals, meat, beans, and aquatic products had the highest concentrations of Cu and Cd, Pb and Cr, Ni, and As, respectively. Generally, meat, eggs, and aquatic products exhibited higher bioaccessibility than cereals, beans, and vegetables. The bioaccessibility of metal(loid)s decreased in the following order: Pb > Cr > Cu > Ni > As > Cd. For non-carcinogenic risks, the average hazard index was 7.3, with 99.6% exceeding acceptable levels. Arsenic was the dominant risk element and aquatic product was the main risk source. The aggregated carcinogenic risk was 3.4 × 10–3, with Cr the major risk contributor and cereals and meat the dominant food sources. The findings demonstrated that (1) the metal(loid) dietary exposure risk of children from areas with intensive smelting activities should be taken seriously, and (2) it is necessary to identify the specific food category and metal(loid) based on a comprehensive analysis of the metal(loid) concentration and bioaccessibility, and dietary habits of the population to effectively reduce risk.

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Predicted aquatic and human health risks associated with the presence of metals in the Syr Darya and Shardara Reservoir, Kazakhstan

Cited by 4 publications

References 28 publications

Fish and Seafood Safety: Human Exposure to Toxic Metals from the Aquatic Environment and Fish in Central Asia

Fish and Seafood Safety: Human Exposure to Toxic Metals from the Aquatic Environment and Fish in Central Asia

Wastewater Treatment in Central Asia: Treatment Alternatives for Safe Water Reuse

Bioaccessibility-corrected probabilistic health risk assessment of dietary metal(loid) exposure in six major food groups in children from Northwest China

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