Hydrogeochemistry of Urban Territories in the Southern Fore-Ural Areas

— Data of field studies elucidate how the chemical composition of groundwaters is formed at urban territories in the southern Fore-Ural areas. These data were used to determine the changes in the salt composition of pore-waters in the clay rocks, their exchange–adsorption characteristics, and the di...

Full description

Saved in:
Bibliographic Details
Published in:Geochemistry international 2019-07, Vol.57 (7), p.812-820
Main Author: Abdrakhmanov, R. F.
Format: Article
Language:English
Subjects:
Adsorption
Aquifers
Chemical composition
Chlorinated hydrocarbons
Clay
Composition effects
Contaminants
Contamination
Dioxin
Dioxins
Earth and Environmental Science
Earth Sciences
Environmental impact
Geochemistry
Geological processes
Geology
Heavy metals
Hydrogeochemistry
Industrial plants
Metals
Organic chemistry
Organic contaminants
Rock
Rocks
Salts
Water circulation
Water pollution
Water, Underground
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:— Data of field studies elucidate how the chemical composition of groundwaters is formed at urban territories in the southern Fore-Ural areas. These data were used to determine the changes in the salt composition of pore-waters in the clay rocks, their exchange–adsorption characteristics, and the distribution and accumulation of supertoxicants in the rocks and waters. The effect of the chemical composition of the waters on hazardous geological processes is estimated. It is determined that the geological environment is most strongly impacted within the depth range from the surface to 15–20 m. Dioxins and heavy metals are concentrated in the ground at the sites of industrial facilities near the surface (at depths up to 5–7 m), and their concentrations drastically decrease at depths from 5–7 to 20 m. Liquid organic contaminants and water-soluble salts penetrate through almost the whole circulation zone. The self-clarification of the aquifers and the recovery of the natural parameters takes dozens to hundreds of years, even after the contamination source is eliminated, i.e., the characteristic time of this process exceeds the lifetime of one generation of humans.
ISSN:0016-7029
1556-1968
DOI:10.1134/S0016702919070036