Browsing by Author "Sarnai Amarbayasgalan"

Now showing 1 - 1 of 1
  • Thumbnail Image
    Item
    Soil pollution risks associated to ash disposal and deposition in the ger districts of ulaanbaatar
    (German Mongolian Institute for Resouce and Technology, 2021-05-12) Sarnai Amarbayasgalan; Daniel Karthe; Enkhjargal Sodnomdarjaa
    The research is aimed to assess soil pollution risks due to ash disposal and deposition in ger districts of Ulaanbaatar. The study continued from November 2020 to May 2021. Ash samples were taken from Nalaikh raw coal ash and Tavan-tolgoi briquette ash, in total 12 samples were assessed. Soil samples were taken from the top soil of Ulaanbaatar, in total 10 samples were evaluated. Main soil pollution analysis indices, ecological impacts and human health impacts were examined in this study. Fly ash of Nalaikh raw coal was strongly contaminated by As and Pb in comparison with fly ash of Tavan-tolgoi briquette. As and Cd concentration on top soil of ger districts of Ulaanbaatar exceeded the permissible limit, however other elements were not listed in MNS 5850:2019. Total carcinogenic risk (TCR) and non-carcinogenic risks to children was beyond USEPA recommended limit under ingestion and dermal contact pathways. For ecological risk assessment, Zn and As in fly ash of both coals showed very strong contamination indexes. Cd, As, and Pb are considered as higher ecological toxicity than other heavy metals in fly ashes. Disposal and deposition of Nalaikh raw coal ash have more adverse consequences than Tavantolgoi briquette ash.