heavy metals

ADSORPTION OF Cu (II) and Cr (III) IONS FROM AQUEOUS MEDIUM IN FIXED BED COLUMN

The adsorption of Copper (II) and Chromium (III) from aqueous solution by natural zeolite was investigated in fixed bed column. The effects of selected operating parameters such as flow rate and bed depth were evaluated. The breakthrough data are fitted well to Bed Depth Service Time (BDST) and Thomas models with high correlation coefficient, R2 = 0,91. The results showed that zeolite can be an effective adsorbent for Copper (II) and Chromium (III) removal.

RESEARCH OF MIGRATION PATTERNS OF HEAVY METALS IN THE SOIL ENVIRONMENT IN THE AREA OF PHOSPHOGYPSUM STORAGE INFLUENCE

The paper is focused on the research of migration process of heavy metals in the soil environment in the area of phosphogypsum storage in Sumy region. In the profile of the gray forest soils the corresponding genetic horizons were identified. The various structures of compounds containing heavy metals were detected in the samples by the diffractometric analysis. The increased gross content of lead in comparison with the background concentration in allocated humus and illuvial horizons has been determined.

SORPTION PURIFICATION OF NATURAL WATER FROM MICRO-MIXTURES OF HARD METALS

The research determines the efficiency of the use of activated carbon in the process of water purification from heavy-metal ions for technological purposes in the food industry. Comparative studies of the use of sorbents of various types of activated carbon have been carried out. The study determines the factors that influence the efficiency of drinking water purification from heavy metal ions through activated carbon. It also proves the highest efficiency of oxidized form of activated carbon

ENVIRONMENT CONTAMINATION WITH HEAVY METALS CONTAINED IN WASTE

The paper analyzes the sources of the most widespread heavy metals contained in waste. Different directions of human activity are considered with emphasis on the waste containing heavy metals. It is established that the largest suppliers of heavy metals include waste of metallurgy, chemical industry, production of electrical appliances, batteries and accumulators, sewage sludge, ash and slag of coal-fired power stations and waste incineration plants, and the recent one is household waste.

Anthropogenic transformation of protective ecotone properties in ways of the railroad transport

The influence of rail transport on the environment creates many problems as it includes violation of the stability of natural landscapes transport infrastructure through the development of erosion and landslides; air pollution by exhaust gases; permanent increase in oil pollution of earth, lead, blowing products and shedding of bulk cargo (coal, ore, cement). Along with the benefits offered by the railway transport, there arise accute lssues of environmental safety during its use, which is caused by its negative and even destructive impacts on the environment.

COMPARISON OF SEDIMENT QUALITY IN RIVER BASINS IN EASTERN SLOVAKIA

The contamination of aquatic and terrestrial ecosystems with heavy metals and other mining chemicals have been major environmental problems in many mining areas of the world. Industrial wastes, geochemical structure and metals mining form a potential source of metal contaminants in the aquatic environment especially in sediment. Monitoring sediment quality is one of the highest priorities in environmental protection policies.

THE METHODOLOGY FOR DESIGN OF INFORMATIONAL AND ANALYTICAL SYSTEM FOR ENVIRONMENTAL MONITORING OF MINING AND CHEMICAL ENTERPRISE IN THE LIQUIDATION

The impact of the mining and chemical enterprise on the state of pollution of the environment was assessed in the paper. The need to design an informational and analytical system for monitoring the territory of Rozdil state mining and chemical enterprise (SMCE) “Sirka” at the stage of the liquidation was proved. It was established that it is necessary to create an informational and analytical system of environmental monitoring, which will increase the ecological safety of the territory of the enterprise and the surrounding settlements.

Concurrent Sorption of Copper and Chromium Cations by Natural Zeolite

The aim of this work was to study the process of adsorption of Copper and Chromium cations by natural zeolites in static conditions. The change of the chemical composition of the surface of the zeolite as a result of sorption of heavy metals was investigated. The influence of the type of the ions and pH selectivity in absorption of heavy metals removal by zeolite was analysed. The reasons for the selective extraction of Copper from two-component solution were explained.

Development of low waste technology of water purification from copper ions

The results of the water stabilization treatment studies to feed the cooling water circulation systems by ion exchange method are reported. The processes of the water softener on strongly and weakly acidic cation resins in the presence of copper ions are studied. The relation of the water purification efficiency from copper and its softening depending on the form of the ion-exchanger and water consumption was determined.

Stripping voltamperometric determination of heavy metals in honey samples

The content of zinc, cadmium, lead, and copper in honey varieties was determined by the method of stripping voltammetry. Samples preparing was made by three different methods: dry and hydro ashing, as well by “hydro” mineralization and dry ashing. It was found that all methods of samples preparing can be used for destroying honey matrix, but the combined method of samples preparing is the most efficient one for ions of heavy metals extracting and provides accuracy of the definition.