SORBENT FOR IMMOBILIZATION OF TOXIC AND CONTAMINATING SUBSTANCES

摘要

The invention solves the use of ashes obtained by combustion of solid fuels at high temperatures e.g. in fuel powder kettles, if desired with addition of a biologically active substance containing bacteria causing destruction of organic matter as sorbent for immobilizing toxic and contaminating components and thus for protecting the environment from contamination with toxic elements or from their incorporation into the biosphere. The invention utilizes high sorption capacity of ashes for a very firm fixation of detrimental compounds that are thus immobilized and cannot penetrate into the biosphere. The biologically active matter, if present, causes decomposition of organic contaminants. This property is utilized e.g. so that between the source of contamination such as a dump, and the environment a barrier of an ash layer is formed, said ash having high sorption capacity so that the contaminants are immobilized by sorption on the ash and, if flooded, water gets through whilst the toxic elements are fixed. Another possibility is filtration of contaminated water through a layer of a sorbent based on the ash. The third possibility is the mixing of the contaminated material e.g. soil, with an ash sorbent.