Geology, geography and global energy

Scientific and Technical Journal

Microparticles as a factor affecting the accumulation of heavy metals in soil, road dust and bottom sediments

2022. №3, pp. 89-105

Fedorov Yury A. - Southern Federal University, Rostov-on-Don, Russia

Chepurnaya Victoria I. - Southern Federal University, Rostov-on-Don, Russia

Gar`kusha Dmitry N. - Southern Federal University, Rostov-on-Don, Russia

Dotsenko Irina - Southern Federal University, Rostov-on-Don, Russia

Mikhailenko Anna V. - Southern Federal University, Rostov-on-Don, Russia

Popov Yury V. - Southern Federal University, Rostov-on-Don, Russia

Gavrilova Irina Yu. - Southern Scientific Centre RAS, Rostov-on-Don, Russia

With the modern instrumental methods, the granulometric and material composition, as well as the content of Zn and Cu in the components of elementary landscapes, represented by soils, road dust, sediments at the water's edge and bottom sediments of the Rostov region, were studied. They were represented by natural and technological formations. The total content of Zn varied regardless of the place of sampling in the range from 31.1 to 120.9 mg/kg (average 74.2 mg/kg), and the content of Cu - from 31.2 to 90.4 mg/kg (in 55.4 mg/kg on average). According to the average content of Zn and Cu, the studied objects line up in the following row: bottom sediments > soil, road dust > sediments at the water's edge. In the rows of the distribution sequence of the content of Cu and Zn, on the one hand, and the sum of fractions (in %) with the dimension of microparticles <0.01 and <0.002 mm, on the other hand, a tendency is found, which consists in a combined increase in the number of fine particles in the studied media and the content of both TM. The correlation between the amount (in %) of the <0.002 mm and <0.01 fractions, on the one hand, and the content of Zn and Cu in the studied samples for the entire data set, on the other hand, turned out to be a weak straight line for zinc and a high straight line for copper. It is shown that the granulometric and material composition of bottom sediments, sediments at the water's edge, soils, road dust are one of the dominant factors controlling the accumulation of HMs.

Key words: heavy metals, granulometric composition, road dust, bottom sediments, soil