Pollution with trace elements and rare-earth metals in the lower course of Syr Darya River and Small Aral Sea, Kazakhstan

Piotr Rzymski , Piotr Klimaszyk , Przemysław Niedzielski , Włodzimierz Marszelewski , Dariusz Borowiak , Kamil Nowiński , Ainur Baikenzheyeva , Rakhat Kurmanbayev , Nikolai Aladin


Over recent decades the Aral Sea has faced a major human-driven regression leading to environmental, economic and health impacts. Previous research has indicated that its region may be highly polluted yet there is little recent data to assess the scale or nature of the pollution. The present study investigated the concentration of elements for which the World Health Organization (WHO) has established guideline levels (Al, As, B, Ba, Cd, Cr, Cu, Ni, Pb, Sb) as well as 16 rare-earth elements (Ce, Eu, Er, Gd, La, Nd, Pr, Sc, Sm, Dy, Ho, Lu, Tb, Tm, Y, Yb) in the Small Aral Sea (SAS) and its inflow, the Syr Darya River (SDR). The latter displayed increased levels of Al (mean 851 μg L−1), As (35.8 μg L−1), Cd (2.8 μg L−1), Pb (10.1 μg L−1) and U (4.9 μg L−1), exceeding the guideline limits at selected sites. In the SAS these limits were exceeded at certain locations in the case of As and U. The total mean concentration of REEs in the SDR and SAS amounted to 22.6 and 61.7 μg L−1, respectively, with Pr, Ce and Nd constituting the greatest share. The concentrations of B, Ba Cr, Cu, Se and Ni were below the WHO guideline levels at all studied sites while Sb and Hg were always below detection limits. This research provides an updated status on the levels of contamination of the surface waters in the ecological disaster zone of the Aral Sea in Kazakhstan.
Author Piotr Rzymski
Piotr Rzymski,,
, Piotr Klimaszyk
Piotr Klimaszyk,,
, Przemysław Niedzielski
Przemysław Niedzielski,,
, Włodzimierz Marszelewski
Włodzimierz Marszelewski,,
, Dariusz Borowiak (FOG/IG/DLimn)
Dariusz Borowiak,,
- Department of Limnology
, Kamil Nowiński (FOG/IG/DLimn)
Kamil Nowiński,,
- Department of Limnology
, Ainur Baikenzheyeva
Ainur Baikenzheyeva,,
, Rakhat Kurmanbayev
Rakhat Kurmanbayev,,
, Nikolai Aladin
Nikolai Aladin,,
Journal seriesChemosphere, ISSN 0045-6535, e-ISSN 1879-1298, (N/A 100 pkt)
Issue year2019
Publication size in sheets0.50
Keywords in EnglishAral Sea, Syr Darya, toxic metals, arsenic, rare-earth elements, Kazakhstan
ASJC Classification2700 General Medicine; 1600 General Chemistry; 2304 Environmental Chemistry
Languageen angielski
Score (nominal)100
Score sourcejournalList
ScoreMinisterial score = 100.0, 30-01-2020, ArticleFromJournal
Publication indicators WoS Citations = 0.000; Scopus SNIP (Source Normalised Impact per Paper): 2018 = 1.540; WoS Impact Factor: 2018 = 5.108 (2) - 2018=5.089 (5)
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