Abstract
The eastern/western Taijinar Salt Lake in Qaidam Basin is rich in lithium and boron resources. Chemical speciation of boron and lithium is conducive to identify the migration way and enrichment of heavy metals which might cause certain effects on the environment of salt-lake area. A total of 28 surface sediment samples were collected from the Taijinar Salt Lake in June of 2020 to investigate the distribution, speciation and sources of boron and lithium in salt-lake sediments. The results showed that the average content of boron/lithium was low with value of 1.6/3.4 µg kg−1, while that of the other elements in sediments ranging from 0.035 µg kg−1 (Cd) to 48.20 mg kg−1 (As) by following the order of As > Pb > Hg > Zn > Cr > Cd. Boron and lithium in sediments were mainly bound to Fe–Mn oxide and residual fractions with the average proportion of 29.87% and 35.36% for boron as well as 32.18% and 31.43% for lithium. Pb mainly existed in carbonate and residual fraction, while Zn mainly existed in the Fe–Mn oxide and residual bound with average value of 40.56% and 43.32%, respectively. Hg/Cr mainly existed in the residual with the average value of 58.68%/84.18%, while Cd mainly existed in the Fe–Mn oxide and residual fraction with an average proportion of 26.52% and 30.89%, respectively. As mainly existed in Fe–Mn oxide, residual, and organic fraction with an average proportion of 30.20%, 32.61% and 21.92%, respectively. Elements including Zn, Cr and Pb had a certain influence on the speciation of boron and lithium based on the correlation analysis. The enrichment of Cd, Cr and Pb might be mainly caused by anthropogenic sources. The findings of this study will provide some basic information on the important elements including lithium and boron in the salt-lake areas.
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Acknowledgements
This work was financially supported by One Hundred Talents Program of Chinese Academy of Sciences (Y610061033) and Youth Innovation Team Project for Talent Introduction and Cultivation in Universities of Shandong Province. We also would like to thank the reviewers for their valuable comments and suggestions on the manuscript.
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Li, B., Wu, J. & Li, L. Speciation and correlation of boron and lithium in surficial sediments of the eastern and western Taijinar Salt Lake. Environ Earth Sci 80, 382 (2021). https://doi.org/10.1007/s12665-021-09689-1
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DOI: https://doi.org/10.1007/s12665-021-09689-1