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Lead Isotope and Trace Element Composition of Urban Soils in Mongolia TEXT SIZE: A A A

Lead (Pb) pollution in and around Ulaanbaatar is of national concern, given that the Mongolian capital is home to nearly half of the country's entire population. By comparison, Mongolian countryside is a pristine environment because of its sparse population and low industrial activity. The concentration of Pb in urban soils (average of 39.1 mg kg(-1)) was twice the values found (average 18.6 mg kg(-1)) in background territories (i.e., Mongolian rural sites). Furthermore, Pb contamination was examined by using Pb stable isotopic composition, and covariance of Pb isotopic ratios showed two groups between rural and urban soils as pristine and disturbed sites. The Pb-206/Pb-207 ratio, the most prominent fingerprint for Pb pollution, was 1.163-1.185 for the urban whereas values for rural soils (1.186-1.207) were analogue to the regional Pb isotopic signatures. Local coal sources and their combustion products, one of the potential Pb pollution sources in Ulaanbaatar, have significant radiogenic properties in terms of Pb isotopic composition and revealed an average of 1.25 for Pb-206/Pb-207 and 19.551 for Pb-206/Pb-204 ratios. Thus, contributions from coal firing activity to Pb pollution lower than it was assumed, and smaller range of these values measured in urban soils may be attributed to the mixing of less radiogenic Pb as a constituent of the leaded gasolines.

Publication name

 EURASIAN SOIL SCIENCE, 49 (8):879-889; 10.1134/S1064229316080147 AUG 2016

Author(s)

 Tserenpil, Sh.; Sapkota, A.; Liu, C. -Q.; Peng, J. -H.; Liu, B.; Segebade, P. Chr.

Corresponding author 

 Tserenpil, Sh. 
 tserenpil.sh@gmail.com
 1. Akdeniz Univ, Nucl Applicat & Res Ctr, TR-07958 Antalya, Turkey
 2. Natl Univ Mongolia, Nucl Res Ctr, Ulaanbaatar 14200, Mongol Peo Rep
 3. Inst Geochem, Guiyang 550002, Peoples R China

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