Abstract
The sorption properties of the sand-breakstone mixture based on the mineral component of building refuse of the 0-10 mm fraction with respect to Pb2+, Zn2+, Cu2+, Ni2+, Cd2+ and Hg2+ ions were studied using atomic absorption spectroscopy. The mechanisms of accumulation of heavy metal ions on the surface of the mixture particles are described. It was found that after washing the contaminated material distilled water, the residual concentration of metals in the filtrate does not exceed the established sanitary and hygienic standards. The practical value of the work lies in the possibility of applying the results in reclamation of technogenic formations or production of materials for the technical stage of reclamation using technogenic soils.
Highlights
The heavy metal pollution of the environment is a serious problem nowadays
The sorption properties of the sand-breakstone mixture based on the mineral component of building refuse of the 0-10 mm fraction with respect to Pb2+, Zn2+, Cu2+, Ni2+, Cd2+ and Hg2+ ions were studied using atomic absorption spectroscopy
Moisture is always present in the soil and the migration of heavy metal ions occurs with its active participation
Summary
The heavy metal pollution of the environment is a serious problem nowadays. Soils nearby to plant facilities and industrial dumping sites are the most intensively affected by this type of exposure. The ability of building refuse to sorb heavy metal ions has been proved by a lot of studies Such barriers belong to physicochemical ones because ions fixation generally arises from coordination bond formation between metals and functional groups of barrier particles surface. It was reported [7] that basic properties of building refuse which cause a high receptivity are capillary pores and silicon and calcium minerals in the composition. Recent studies have shown that the dynamic capacity of building refuse is comparable to the capacity of most synthetic sorbents [9,10] This type of waste is more attractive for geochemical barriers formation because of abundance and availability at low cost. The article presents the results of sorption studies of heavy metal ions from their mixture
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