NDLI: Vertical distribution of physical–chemical features of water and bottom sediments in four saline lakes of the Khangai mountain region, Western Mongolia

Content Provider	Springer Nature Link
Author	Baatar, Bayanmunkh Chuluun, Buyan Tang, Sen Lin Bayanjargal, Ochirkhuyag Oyuntsetseg, Bolormaa
Copyright Year	2017
Abstract	Characterizing vertical profiles of water columns is important to understanding the biochemical cycles and nutrient dynamics of an aquatic ecosystem. Physical and chemical properties of surface water in Mongolian saline lakes have been studied over the past decade, but chemical composition along a vertical profile of the water column has not been well documented. Four major saline lakes (Lakes Telmen, Oigon, Tsegeen and Khag) in northwestern Mongolia were studied to determine geochemical behavior of microelements and to assess major ionic components and trace elements associated with vertical profile of various water samples and sediments. Water samples were vertically collected from each sampling depth with a vacuum deep-water sampler in July 2013. Physical–chemical parameters, major ionic components and trace elements were analyzed by conventional methods and inductively coupled plasma-mass spectrometry. Concentrations of microelements and mineralogical composition of sediment samples from near shore were characterized by X-ray fluorescence spectrometry and X-ray diffraction. This study was apparently the first to characterize chemical composition along vertical profiles of these lakes. Sodium, chloride and sulfate ions were largely conserved in all water samples except Lake Oigon. Depending on salinity type, these lakes were divided into sodium-sulfate lake (Lake Khag) or chloride lakes. Due to geomorphological characteristics, strontium (≤3.18 mg/l) was the only ion in the highest concentration across all depths of water and sediment samples among the lakes. Sediments were comprised mainly of quartz, anorthite, albite and orthoclase. In conclusion, physical and chemical properties in Lake Oigon were highly variable and dissimilar among lakes. Furthermore, we inferred that vertical profiles of water columns were intimately linked to variations in chemical composition of salt lakes in the western Mongolia.
Starting Page	1
Ending Page	14
Page Count	14
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	76
Issue Number	3
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-02-04
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Saline lakes Hydrochemistry Vertical profile Sediment Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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