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Dr. Myagmartseren Purevtseren

International Conference on Natural Resources and Sustainable Development in Surrounding Regions of the Mongolian Plateau September 12-14, 2008 Ulaanbaatar, Mongolia. The Result of the Heavy Metal Contamination Researches’ in Ulaanbaatar City Residential Areas Soils.

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Dr. Myagmartseren Purevtseren

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  1. International Conference on Natural Resources and Sustainable Development in Surrounding Regions of the Mongolian Plateau September 12-14, 2008 Ulaanbaatar, Mongolia The Result of the Heavy Metal Contamination Researches’ in Ulaanbaatar City Residential Areas Soils Dr. Myagmartseren Purevtseren National University of Mongolia, Earth Science FacultyDepartment of Land Management& Geo-ecology E-mail: land_management@hotmail.com

  2. Residential area expansion

  3. Urban land monitoring

  4. Introduction • The aim of this study is to assess the extent of heavy metal contamination of soil due to settlement with high concentration of population on residential built-up land of Ulaanbaatar city. • Samples of soils from different locations of city have been analyzed for seven heavy metals, viz. Co, Zn, Cu, Ni, Cr, Pb and Cd using atomic absorption spectrophotometry.

  5. Sampling

  6. Sampling

  7. Sampling

  8. Sampling

  9. Result :Heavy metal contamination in soils of residential areas

  10. Result

  11. Zinc concentration in soils

  12. Lead concentration in soils

  13. Conclusion • The average total concentration of all metals in soil samples was lower than the permissible limits (limits are based on their effect on population health). However, maximum concentration of Zn and Pb falls within the range of standards. It was found that the average concentration of heavy metals in surface soils, i.e. Pb and Zn was more and less high than the natural concentration. • Comparing the results of heavy metals in soil with their respective natural levels and mean level of city with has been studied earlier by scientists, it is observed that impact of settlement on residential area was found to be more than the unsettled open spaces of city and green belt. • The study reveals that built up residential area is not the main source of pollution of the soil environment and “ger” area with waste-contaminated soil containing variable amounts of heavy metals leads to increase in concentration of metals in the soil and other environmental components. Concentration of metals in soil will provide baseline data and there is a need for intensive sampling of the same for quantification of the results.

  14. THANK YOU

  15. Result • The results show the presence of some of the heavy metals in soils, beyond the limits of permissible limit standards.

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