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Spatial Distributions, Sources and Risk Assessment of Toxic Elements in Waters of a Central Asian Basin

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  • Beibei Shen

    (Yangzhou University)

  • Jinglu Wu

    (Chinese Academy of Sciences
    Chinese Academy of Sciences)

  • Shuie Zhan

    (Chinese Academy of Sciences)

  • Miao Jin

    (Chinese Academy of Sciences)

Abstract

We measured selected toxic element concentrations in surface water samples of the Ili-Balkhash Basin to obtain current contaminant levels. Fe, Cu, Zn, As and Pb were the most abundant toxic elements in basin waters, whereas Ni and Co were less abundant. Concentrations in water samples were generally within international water quality standards, with a few exceptions (high Cu, Pb and As in lake waters). These pollution hotspots were associated with the presence of industrial and domestic effluents, revealed by spatial distribution maps. Correlation and principal component analysis classified four pollutant groups and their sources, which were both natural and anthropogenic. Moreover, highly polluted waters at headwater areas were associated to atmospheric transport and deposition. The water quality indices denoted that river waters are suitable for irrigation and drinking, while lake waters demand remedial measures. A health risk assessment indicated that non-carcinogenic and carcinogenic risks in river waters were below threshold values, whereas lake water samples surpassed safe limits, and As was identified as a potential hazard, suggesting that consumption of lake water may cause adverse health effects in local inhabitants. Thus, regular monitoring and regulation, particularly of As in the lake, should be implemented.

Suggested Citation

  • Beibei Shen & Jinglu Wu & Shuie Zhan & Miao Jin, 2022. "Spatial Distributions, Sources and Risk Assessment of Toxic Elements in Waters of a Central Asian Basin," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 36(15), pages 6187-6203, December.
    • Handle: RePEc:spr:waterr:v:36:y:2022:i:15:d:10.1007_s11269-022-03348-1
    DOI: 10.1007/s11269-022-03348-1
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    References listed on IDEAS

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    1. Wen Liu & Long Ma & Yaoming Li & Jilili Abuduwaili & Salamat Abdyzhapar uulu, 2020. "Heavy Metals and Related Human Health Risk Assessment for River Waters in the Issyk−Kul Basin, Kyrgyzstan, Central Asia," IJERPH, MDPI, vol. 17(10), pages 1-13, May.
    2. Yovana Todorova & Stilyana Lincheva & Ivaylo Yotinov & Yana Topalova, 2016. "Contamination and Ecological Risk Assessment of Long-Term Polluted Sediments with Heavy Metals in Small Hydropower Cascade," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 30(12), pages 4171-4184, September.
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    Cited by:

    1. Gulnura Issanova & Azamat Kaldybayev & Yongxiao Ge & Jilili Abuduwaili & Long Ma, 2023. "Spatial and Temporal Characteristics of Dust Storms and Aeolian Processes in the Southern Balkash Deserts in Kazakhstan, Central Asia," Land, MDPI, vol. 12(3), pages 1-14, March.

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