The Study of Soil Detoxification of the Municipal Landfill of Solid Waste Using Sorbent "Agroionit"

The technology on separation of the solid wastes at the municipal waste landfills obtaining solid waste and soil, which is sanitized with the use of natural sorbent "Agroionit" is suggested. It showed that sorbent "Agrionite" application in the amount of 16 % in absolutely dry matter could reduce the content of mobile forms of heavy metals up to MPC. To reduce the amount of sorbent up to 12 % pre-treatment of soil with lime in the amount of 0,4 % for the detoxification of zinc, which is slowly absorbed by Agrionite is required. Appropriate changes to the developed technology have been added, including the regulation of temperature and humidity of soil.

Soling processes in technologies of civil engineering and environmental protection

The paper deals with soling technologies in civil engineering and environmental protection. The object of the interest is silica sol coating, which is formed when a concrete article gets hard in silica sol solution, as well as the sediments of silica sol soil detoxification. The main aim of the research is physical and chemical specificities of soling process. The methods of the study are electronic microscope scanning, x-ray analysis, derivatographic and chemical analysis. It has been found that in silica sol technology, layers of new phases are formed on the surface of cement concrete articles, e.g. calcium hydrates. The depth of the layers has been established. The nature of silica gel after heavy metal soil detoxification has been determined. The prospects of new sol-gel technologies are discussed.