Silicon in ultrafresh groundwater: a case study of the Imandra Lake catchment, The Kola Peninsula

Natalia V Guseva,Albina A Khvashchevskaya,Daria A Vorobeva,Zinaida A Evtyugina,Yuliya G Kopylova,O Chudaev,O Shouakar-Stash,R Harmon,R Millot,Y Kharaka

doi:10.1051/e3sconf/20199801018

Abstract

The ultrafresh groundwater (with TDS values less than 200 mg/L) of the Imandra Lake catchment, Kola Peninsula, is from an intensive water exchange zone, where the water has a short period of contact with the rock. Therefore, the considered water is at the initial stages of the water–rock interaction. The water is saturated with respect to oxides and hydroxides of aluminium and iron. In the groundwater of the Imandra Lake catchment area, the silicon concentrations significantly exceed the concentrations of magnesium and especially potassium. Nevertheless, water is undersaturated with respect to with respect to silicon oxides. The shown enrichment of water with cations is explained by time of water-rock interaction.

Highlights

The area of Lake Imandra in the Kola Peninsula is a territory where mining and metallurgical enterprises are concentrated
The microcomponent composition of water was determined by inductively coupled plasma mass spectrometry (ICP-MS)
The ultrafresh groundwater of the Imandra Lake region (Kola Peninsula) is caused by hydrogeological structure of intensive water exchange zone, where the water has a short period of the water-rock interaction

Summary

Introduction

The area of Lake Imandra in the Kola Peninsula is a territory where mining and metallurgical enterprises are concentrated. The technogenic influence inevitably leads to a change in the course of hydrogeochemical processes in the catchment area [1, 2]. The defining process in the formation of natural water of diverse composition and salinity according to modern concepts is the interaction of water with rocks [3]. At each stage of interaction in the water–rock system, a strictly defined composition of water is formed. The everlasting effects of emissions of sulfur, copper and nickel compounds have led to the degradation of forest landscapes to such an extent that forests have been completely destroyed thereby leading to the formation of man-made wastelands [4, 5]. Questions regarding the chemical characteristics and the quality of water under such conditions inevitably arise [6, 7] and are discussed in this report

Study area and methods

Results and discussion

Conclusion