Lithosphere Preservation with the Use of Silica Sol Properties

International science and technology conference "Earth science"

Svatovskaya, L.^1 ; Sychov, M.^2 ; Drobyshev, I.^1

Emperor Alexander i St.-Petersburg State Transport University (PGUPS), Moskovsky pr. 9, St.-Petersburg

190031, Russia^1

St.-Petersburg State Institute of Technology, Technical University, Moskovsky pr. 26, St.-Petersburg

190031, Russia^2

关键词: Absorption property;    Binding properties;    Environmental pollutions;    Geomaterials;    Method of identifications;    Natural minerals;    Silica sols;    Solubility product;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/272/2/022160/pdf
DOI  :  10.1088/1755-1315/272/2/022160

来源: IOP

【 摘 要 】

There are a number of problems of lithosphere preservation. Environmental pollution is one of them. The problems are related to the use of substances for detoxication. These substances must be the same as natural minerals, i.e. they must have detoxicating properties and form useful products after detoxication. The main aim of the paper is to find substance properties for lithosphere preservation. Silica sol is supposed to be a suitable substance. It was established that 4 properties of silica sol can be used for lithosphere preservation: 1) silica sol's conversion into silica gel which has absorption properties; 2) possible reactions with pollutions, e.g. heavy metal ion detoxication; 3) the colours of the sediments of silicates and hydroxides to identify heavy metal ions; 4) silica sol's conversion into silica gel which has binding properties. The research introduces the new qualitative express method of identification and detoxication of heavy metal ion pollutions based on the sediment colours and low solubility product to increase the strength of a geomaterial. The practical examples are also given.