Sorption processes in nanofibres
Title Alternative:Sorption processes in nanofibres
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Date
2011
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Publisher
Technická Univerzita v Liberci
Abstract
With the increasing concern of colour removal from wastewater before discharging it to the environmental rivers and with the knowledge of sorption process as being the only process so far which can remove dyes effectively on wastewater, however the current sorbent materials used in this process are expensive. This yield attention in finding cheaper sorbent material that would be able to solve the current latter. Recently there has been much attention paid to nanofibers as alternative sorbents because of the high surface area they propound. In this study electrospun polyamide 6 nanofibers were used as the sorbent material to remove colour of dyes in the simulated wastewater concentration of textile industries, using sorption-filtration method which was able to remove dye in relatively short time since the system was under vacuum pressure and the sorbent thickness by adding more nanofiber layers was tested, where it was concluded that the percentage of dye removal increases if the thickness (more nanofiber layers) of sorbent was increased. The presented process has more potential in dye removal studies because the sorbent (nanofilter) was protected from mechanical damage and it possible to perform many experiments in short time. The sorption properties of nanofibers were also tested by kinetics experiments and equilibrium experiments where two substrate of polyamide 6 (standard fibres and nanofibers) were compared in both experiments. The Cegarra-Punte was the best fit theoretical model to describe kinetics experiments, where Langmuir isotherm was the best model for describing equilibrium experiments. With Langmuir saturation constant S it was concluded based on the obtained result that nanofibers had 10 time higher saturation value when compared to standard fibres which was explained by the high surface area that nanofibers offer. The diffusion coefficient was also used to further study the sorption properties of the two substrates.
With the increasing concern of colour removal from wastewater before discharging it to the environmental rivers and with the knowledge of sorption process as being the only process so far which can remove dyes effectively on wastewater, however the current sorbent materials used in this process are expensive. This yield attention in finding cheaper sorbent material that would be able to solve the current latter. Recently there has been much attention paid to nanofibers as alternative sorbents because of the high surface area they propound. In this study electrospun polyamide 6 nanofibers were used as the sorbent material to remove colour of dyes in the simulated wastewater concentration of textile industries, using sorption-filtration method which was able to remove dye in relatively short time since the system was under vacuum pressure and the sorbent thickness by adding more nanofiber layers was tested, where it was concluded that the percentage of dye removal increases if the thickness (more nanofiber layers) of sorbent was increased. The presented process has more potential in dye removal studies because the sorbent (nanofilter) was protected from mechanical damage and it possible to perform many experiments in short time. The sorption properties of nanofibers were also tested by kinetics experiments and equilibrium experiments where two substrate of polyamide 6 (standard fibres and nanofibers) were compared in both experiments. The Cegarra-Punte was the best fit theoretical model to describe kinetics experiments, where Langmuir isotherm was the best model for describing equilibrium experiments. With Langmuir saturation constant S it was concluded based on the obtained result that nanofibers had 10 time higher saturation value when compared to standard fibres which was explained by the high surface area that nanofibers offer. The diffusion coefficient was also used to further study the sorption properties of the two substrates.
With the increasing concern of colour removal from wastewater before discharging it to the environmental rivers and with the knowledge of sorption process as being the only process so far which can remove dyes effectively on wastewater, however the current sorbent materials used in this process are expensive. This yield attention in finding cheaper sorbent material that would be able to solve the current latter. Recently there has been much attention paid to nanofibers as alternative sorbents because of the high surface area they propound. In this study electrospun polyamide 6 nanofibers were used as the sorbent material to remove colour of dyes in the simulated wastewater concentration of textile industries, using sorption-filtration method which was able to remove dye in relatively short time since the system was under vacuum pressure and the sorbent thickness by adding more nanofiber layers was tested, where it was concluded that the percentage of dye removal increases if the thickness (more nanofiber layers) of sorbent was increased. The presented process has more potential in dye removal studies because the sorbent (nanofilter) was protected from mechanical damage and it possible to perform many experiments in short time. The sorption properties of nanofibers were also tested by kinetics experiments and equilibrium experiments where two substrate of polyamide 6 (standard fibres and nanofibers) were compared in both experiments. The Cegarra-Punte was the best fit theoretical model to describe kinetics experiments, where Langmuir isotherm was the best model for describing equilibrium experiments. With Langmuir saturation constant S it was concluded based on the obtained result that nanofibers had 10 time higher saturation value when compared to standard fibres which was explained by the high surface area that nanofibers offer. The diffusion coefficient was also used to further study the sorption properties of the two substrates.
Description
katedra: KTC; přílohy: 1 CD; rozsah: 89
Subject(s)
nanofibers, sorption, filtration, kinetics, electrospinning, polyamide 6, diffusion, equilibrium isotherms, dye removal on wastewater, nanofibers, sorption, filtration, kinetics, electrospinning, polyamide 6, diffusion, equilibrium isotherms, dye removal on wastewater