About the possibility of sorption concentration of heavy metals using magnetite

This paper addresses the possibility of using magnetite nanoparticles for sorption concentration of heavy metals ions in the analysis of their trace amounts. On the example of copper, lead and nickel ions, optimum conditions for concentrating have been determined, pH, temperature and contact time effect on the adsorption process have been studied in the static mode, and magnetite sorption capacity has been calculated on the basis of experimental data

Sorption concentration of arsenic ions by magnetite

© The author(s). This paper is focused on the possibility of using magnetite powders obtained by chemical and plasma-chemical method for sorption concentration of arsenic ions. Processes of arsenic concentration by two-site sorption in magnetite-water system have been studied, and the optimal conditions for concentration have been defined. In static mode, effects of pH, temperature and contact time on the adsorption process have been studied. As a result, a method for pre-sorption concentration has been proposed, allowing reducing the lower limit of the atomic absorption determination of arsenic content

Sorption concentration of ions of copper (II) and lead (II) by magnetic sorbent

By a chemical method, using a method offered by Massart, where as the use of initial solutions of chlorous and chloric iron magnetite is produced, possessing sorbate properties in relation to the ions of lead(II) and copper(II). Influence of different factors (pH, temperature, time) on the degree of sorption is investigated. A specific surface area of magnetite is measured by the method of Bruner-Emmet-Teller on the analyzer of NOVA 1000e. Structural parameters and phase composition of standards are investigationed by X-ray fluores-cence energy-dispersive spectrometer of brand «BRA-18». The best values of acidity of environment are de-termined for flowing of sorption process on magnetite. Conducted measurements of ζ -potential before and after the sorption indicate the change of charge of double electric layer at the surface of magnetic iron metal-lics, that is related to adsorption of the positively charged cations of the solution. Influence of the interfering ions is indicated, influence of phosphates and sulfates is set on the sorption of IST. The isotherms of sorption of IST are got on magnetic iron. The offered method is tested on the standards of the melted water of snow-cover in the affected of casting production zone

Pollution of the air basin in the cities by motor transport and the industrial enterprises, quality assessment of atmospheric air with the use of calculation methods and instrumental control

Within this work, field observations of structure and intensity of motor transport streams were conducted, the information about the operating sources of atmosphere pollution from the enterprises in the city of Naberezhnye Chelny, their qualitative and quantitative structure, physical parameters were collected, processed and systematized. On the basis of the obtained data a summary calculation of emissions of the industrial enterprises and motor transport was carried out, the list of the priority polluting substances was defined, the complex index of pollution of the atmosphere was calculated, highways with the greatest transport loading were defined. On the basis of instrumental control the measurements of quality of atmospheric air near highways were carried out, actions for optimization of transport streams and decrease in negative impact were offered

Preparation and application of a magnetic composite sorbent for collecting oil from a water surface

© 2006-2016 Asian Research Publishing Network (ARPN). All rights reserved.A oil products are among the most dangerous pollution of water objects. They have a deleterious effect on the physiological and biochemical processes in the body of biological objects. In recent years, more and more attention is paid using of industrial waste for water treatment from oil products. In this study, the composite magnetic sorption material was received by chemical sedimentation using of the waste of MDF production (wood fiber) and iron chloride (II) and (III). Fractional composition and physico-chemical characteristics (Tamped density, content of moisture, ash content, buoyancy, specific surface area) of the reagent was detected, the micrographs were obtained by scanning electron microscope. The elemental composition of materials was identified using the method of energy-dispersive X-ray spectroscopy. The remanent magnetism and the coercive force of the samples of modified wood fiber were calculated According of obtained hysteresis loops. IR spectra of the sorption materials were obtained and described using the method of FTIR spectroscopy in a frequency range of 400-4000 cm-1. Oil sorption capacity and water uptake of waste wood fiber and magnetic composite sorbent were evaluated in static system. Increase of oil sorption capacity and decrease of water uptake after modification of waste wood fiber was observed. Experiments to remove oil pollution from the water surface were carried out. The effectiveness of the proposed sorption material was discussed

Application of a magnetic composite sorbent on the basis of woodworking waste for sewage treatment from heavy metals

© 2010 RJPBCS.On the basis of waste of wood fiber and magnetite the composite sorbent possessing magnetic properties has been received, its physical and sorption properties, possibility of use for sewage treatment from heavy metals have been investigated, the way of regeneration and utilization of the sorbent has been offered

The use of leaves of different tree species as a sorption material for extraction of heavy metal ions from aqueous media

© 2016, International Journal of Pharmacy and Technology. All rights reserved.In a review article summarizes the literature data on the use of tree leaves as sorption materials for removal of heavy metal ions from aqueous media. It is shown that the sorption characteristics of the leaves of trees and the degree of removal of metal ions depends both on the conditions of adsorption (initial concentration of metal ion, temperature, pH, duration of contact), and from species trees. It is shown that the majority of publications devoted to removal from aqueous media toxic ions Cd(II), Cr(VI), Cu(II) and Pb(II). The greatest sorption performance removal of metal ions and the largest number of publications in the literature devoted to sorption using the leaves of the Neem tree (Azadirachta indica)

Assessment of urban air pollution caused by motor vehicle complex and industrial facilities

This paper deals with the collected, processed and systematized information about the existing sources of air pollution caused by the facilities of Naberezhnye Chelny, their physical properties, qualitative and quantitative composition, as well as full-scale survey of the composition and intensity of traffic environment. Based on these data the summary calculation of emissions from factories and motor vehicles was performed. The content of pollutants was instrumentally measured in ambient air and the graphs of correlation between calculated and measured concentrations were constructed

About the possibility of sorption concentration of heavy metals using magnetite

This paper addresses the possibility of using magnetite nanoparticles for sorption concentration of heavy metals ions in the analysis of their trace amounts. On the example of copper, lead and nickel ions, optimum conditions for concentrating have been determined, pH, temperature and contact time effect on the adsorption process have been studied in the static mode, and magnetite sorption capacity has been calculated on the basis of experimental data

About the possibility of sorption concentration of heavy metals using magnetite

This paper addresses the possibility of using magnetite nanoparticles for sorption concentration of heavy metals ions in the analysis of their trace amounts. On the example of copper, lead and nickel ions, optimum conditions for concentrating have been determined, pH, temperature and contact time effect on the adsorption process have been studied in the static mode, and magnetite sorption capacity has been calculated on the basis of experimental data