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

Thermodynamic and kinetic parameters of adsorption of heavy metals ions on magnetic composite sorbent

Copyright © 2019 American Scientific Publishers. All rights reserved. The process of adsorption of Cr 6+ , Cu 2+ and Ni 2+ ions on the magnetic composite sorbent (MCS) that obtained by magnetite deposition on the surface of wood fiber waste was studied. The research of adsorption of the considered heavy metal ions (HMI) was carried out in a static mode in a neutral and acidic medium at temperatures of 288, 298, 308 K. It was found that with increasing temperature, the adsorption capacity MCS increases, that indicates the chemical nature of the forces holding HMI on the composite surface. The adsorption capacity of MCS decreases in an acidic medium, and when the temperature decreases. Adsorption capacities MCS were calculated and adsorption isotherms HMI were constructed based on the obtained data. The adsorption capacity for Cr 6+ ions was 1.47 mmol/g in a neutral medium at 298 K, for Cu 2+ ions—1.09 mmol/g, for Ni 2 + ions—0.60 mmol/g. It is determined that the Langmuir equation the best describes adsorption process with approximation coefficients R 2 more than 0.998. From the data of treatment of adsorption isotherms, it follows that the adsorption processes of HMI on MCS relate to the processes of chemical adsorption. Kinetic dependences were obtained under static conditions in a neutral medium at different temperatures. For determining the limiting stage of adsorption, the obtained experimental data are processed using different kinetic models: diffusion model, pseudo-first and pseudo-second order models. It is found that adsorption process the best describes a pseudo-second order model, that assumes that the chemical reaction of the exchange limits the adsorption process

Adsorption of heavy metals ions and oil products by magnetic composite sorbents based on waste of wood fiber

Copyright © 2019 American Scientific Publishers. All rights reserved. Magnetic composite sorbents (MCS) based on wood fibre waste (WFW) produced by MDF and synthetic magnetite (Fe 3 O 4 ) were obtained in the framework of the presented work. The process of obtaining MCS consisted in deposition of Fe 3 O 4 nanoparticles on the surface of WFW with ammonia water from a solution containing a mixture of trivalent and bivalent iron chlorides. Physicochemical and adsorption properties of composite materials are investigated. It is established that the effect of ultrasonic vibrations during Fe 3 O 4 deposition increases the specific surface area in comparison with the materials obtained without the imposition of ultrasound. The main components of MCS are oxygen, carbon, nitrogen and iron according to the elemental analysis. The presence of a small amount of calcium, magnesium, silicon and iron in the original fiber is explained by the use of binding components in the production, as well as the adhesion of mechanical particles. There is a noticeable increase in the mass fraction of iron associated with Fe3O4 deposition after modification. Experiments on purification of aqueous solutions using MCS have shown that the average degree of purification from ions of heavy metals and petroleum products varies from 79 to 86% depending on the content of Fe 3 O 4 in the composite. Deposition on the surface of WFW Fe 3 O 4 allowed to increase the efficiency of purification of aqueous solutions from heavy metal ions by more than 20%. It is revealed that at increase of iron content in the composition of the composite from 1 to 25% the efficiency of purification from dissolved petroleum products is reduced by 16%. It is established that MCS-1 and MCS-5 sorption materials possess the best adsorption properties. The subsequent increase in the content of Fe 3 O 4 in the composition of composites does not lead to a significant improvement in the adsorption properties, leads to an increase in ash content, worsens the strength and reduces the performance of purification systems in dynamic conditions due to the increase in the pour density of composite materials

Thermodynamic and kinetic parameters of adsorption of heavy metals ions on magnetic composite sorbent

Copyright © 2019 American Scientific Publishers. All rights reserved. The process of adsorption of Cr 6+ , Cu 2+ and Ni 2+ ions on the magnetic composite sorbent (MCS) that obtained by magnetite deposition on the surface of wood fiber waste was studied. The research of adsorption of the considered heavy metal ions (HMI) was carried out in a static mode in a neutral and acidic medium at temperatures of 288, 298, 308 K. It was found that with increasing temperature, the adsorption capacity MCS increases, that indicates the chemical nature of the forces holding HMI on the composite surface. The adsorption capacity of MCS decreases in an acidic medium, and when the temperature decreases. Adsorption capacities MCS were calculated and adsorption isotherms HMI were constructed based on the obtained data. The adsorption capacity for Cr 6+ ions was 1.47 mmol/g in a neutral medium at 298 K, for Cu 2+ ions—1.09 mmol/g, for Ni 2 + ions—0.60 mmol/g. It is determined that the Langmuir equation the best describes adsorption process with approximation coefficients R 2 more than 0.998. From the data of treatment of adsorption isotherms, it follows that the adsorption processes of HMI on MCS relate to the processes of chemical adsorption. Kinetic dependences were obtained under static conditions in a neutral medium at different temperatures. For determining the limiting stage of adsorption, the obtained experimental data are processed using different kinetic models: diffusion model, pseudo-first and pseudo-second order models. It is found that adsorption process the best describes a pseudo-second order model, that assumes that the chemical reaction of the exchange limits the adsorption process

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

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

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