『Abstract
The dust fall in a region is closely related to upwind sources.
Dust fall from sandstorms has a strong influence on industry,
agriculture, and daily life. Hohhot, the capital of Inner Mongolia
Autonomous Region, is downwind of the Inner Mongolia Plateau and
experiences frequent sandstorms during the spring monsoon season.
This study investigated the relationship between dust fall in
the Hohhot area and surface soils on the Inner Mongolia Plateau.
samples of dust fall from Hohhot and surface soils from the plateau
were analyzed for major and trace elements. The SiO2
content of dust fall from sandstorms differs from that of the
plateau soils by only 2.77%, indicating that the main dust fall
source for Hohhot is surface soils from the plateau. Dust samples
from coal smoke, roads, and buildings were used for comparison.
The As content in dust fall from sandstorms is greater than that
found in the plateau soils and in dust from non-sandstorm days.
This indicates that As is added to the sand during transport from
the plateau by coal factories near Hohhot. The second most important
dust source is traffic, as evidenced by Pb contents. Preventing
erosion of sand upwind of Hohhot during the spring monsoon is
key to improving and managing air quality in the Hohhot region.
This can be accomplished through management of the farm grassland
areas.
Keywords: Hohhot; Atmospheric dust fall; Inner Mongolia Plateau;
Surface soil; Monsoon; Dust storms; Air quality』
1 Introduction
2 Sample collection and analysis
3 Results
3.1 Analysis of the relationship between dust fall and its
sources
3.2 Analysis of elemental transport using enrichment factors
4 Conclusion
References