Biotesting of surface water and bottom sediments from the Ile River and the southwestern part of the Balkash Lake
AbstractDuring the expedition trips to the Southern Balkhash in June 2018, samples of surface waters andbottom sediments from various sites of the Ile River and Lake Balkash (the southwestern part) were collected and investigated. As a result of the hydrochemical analysis of surface waters, it was determined that the waters of the Ile (Bakanas) and Topar rivers and Balkash lake (Kuygan) were the most pollutedwith heavy metals: Pb, Cd, Zn and Fe, their level exceeded the maximum permissible concentration(MPC) by 1.6-fold to 5.5-fold. At the same sites of the studied water basin, the MPC for Pb, Cr, Co, Ni,Cd, Zn and Fe in bottom sediments was found to be exceedeng. At the same time, the level of heavymetals found in sediments largely exceeded their content in surface waters, especially in terms of Fecontent (MPC is higher by 2.9-fold to 6.9-fold). Biotesting of surface waters and sediments on zebrafish(Danio rerio) and African clawed frog (Xenopus laevis) embryos revealed their significant embryotoxiceffect, expressed in their 20-40% mortality. In this regard, possible reduction in the number of fish andamphibians in the studied areas was suggested. The results of the study are important for the development of environmental protection measures in the Southern Balkhash region. It is suggested that thedecline in the number of fish and amphibians in the studied water bodies is associated with their deathin early stages of development.Key words: Ile river, Balkash lake, surface waters, sediments, heavy metals, biotesting, Danio rerio,Xenopus laevis, embryotoxicity.
How to Cite
ҚҮЛЫМБЕТ Қ.Қ., ТАСТАН Д.А.,, Шалахметова Т.М., Сутуева Л.Р., Мамилов Н.Ш., Шимшиков Б.Е.,. Biotesting of surface water and bottom sediments from the Ile River and the southwestern part of the Balkash Lake. Eurasian Journal of Ecology, [S.l.], v. 57, n. 4, p. 20-30, feb. 2019. ISSN 2617-7358. Available at: <http://bulletin-ecology.kaznu.kz/index.php/1-eco/article/view/949>. Date accessed: 24 apr. 2019.
ВОЗДЕЙСТВИЕ НА ОКРУЖАЮЩУЮ СРЕДУ АНТРОПОГЕННЫХ ФАКТОРОВ И ЗАЩИТА ОКРУЖАЮЩЕЙ СРЕДЫ