Rehabilitation of the man-caused disturbed territories of sinter production

Abstract

Search for economical and available technologies, enabling to recreate the fertile layer at the dump surface of disturbed lands and involving the reclamated territories into the economic turnover is an actual task at the present. Reclamation is a base of lands rehabilitation. Reclamation includes a set of measures aimed at forming on the surface of industrial dumps a favorable root-inhabited layer by various ways with subsequent use of this area. Conservation is the fixation of the surface of the dumps by mechanical means or by gardening the surface of the dumps with a preliminary application of a minimum layer of soil, peat, mineral fertilizers, growth substances, unconventional soil improvers – sewage sludge (WWS). As a result of the work carried out on the surface of the iron ore enrichment waste of the enrichment of the Abagur agglomeration factory, techno-earth (technozems) were formed – artificial soils with a root-inhabited layer consisting of a mixture of WWS and tailing material. Reclamated areas have been created at iron ore beneficiation waste, which ensure erosion stability of the tailing dump surface and conservation of enrichment wastes. The chemical and agrochemical parameters of the technozems during two years of their development have changed. Some alkalinization of the medium and a sharp decrease in the amount of organic matter and all forms of nitrogen in the substrate of the root layer observed. Reclamated areas with the restored natural properties can be included in an ecological framework of the city and are used in the recreational purposes as one of the directions of rehabilitation of lands.