Controlling Factors and Pollution Assessment of Potentially Toxic Elements in Topsoils of the Issyk-Kul Lake Region,Central Asia |
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Authors: | Long Ma Jilili Abuduwaili Yaoming Li Yongxiao Ge |
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Institution: | 1. State Key Laboratory of Desert and Oasis Ecology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi, Xinjiang, China;2. Chinese Academy of Sciences, CAS Research Center for Ecology and Environment of Central Asia, Urumqi, Xinjiang, Chinamalong@ms.xjb.ac.cn http://orcid.org/0000-0002-8233-8640;3. Chinese Academy of Sciences, CAS Research Center for Ecology and Environment of Central Asia, Urumqi, Xinjiang, China http://orcid.org/0000-0001-8483-1554;4. Chinese Academy of Sciences, CAS Research Center for Ecology and Environment of Central Asia, Urumqi, Xinjiang, China http://orcid.org/0000-0003-2948-4590;5. Chinese Academy of Sciences, CAS Research Center for Ecology and Environment of Central Asia, Urumqi, Xinjiang, China http://orcid.org/0000-0001-8111-7259 |
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Abstract: | The Issyk-Kul Lake region is well known for its magnificent scenery and unique scientific significance. With multivariable statistical methods, the contents of several geochemical elements (Fe, Mn, V, Zn, Cr, Co, Ni, Cu, As, Mo, Cd, Sb, Tl, Pb, and Hg) and total organic matter of 61 topsoil samples were analyzed, and then, the results were used to assess the environmental factors controlling the concentrations of potentially toxic elements (PTE) in the region. The results showed that most of the elements including Fe, Mn, V, Cr, Co, Ni, Cu, As, and Sb reflected the natural state, but several PTE (Zn, Mo, Hg, Cd, Pb, and Tl) had been influenced by anthropogenic factors. Among these, Zn, Mo, Hg, and Cd were significantly correlated with the organic matter content, which suggests that agricultural soils will accumulate more PTE. From the calculations for the human risk assessment of anthropogenically derived PTE (Zn, Mo, Hg, Cd, Pb, and Tl), the risks for ingestion in this region were found to be higher than those for inhalation and dermal absorption; however, the results also suggested there are no non-carcinogenic risks for all anthropogenically influenced PTE in the current state. |
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Keywords: | Central Asia controlling factors Issyk-Kul Lake pollution assessment potentially toxic elements topsoil samples |
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