... S. Kiani Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of M... more ... S. Kiani Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran; Membrane Processes and ... TGA was carried out to analyze the unsupported membrane's weight loss during calcination of alu-minatitania membranes. ...
Water in oil emulsions are prepared by using an ultra-sonication device and used in an emulsion l... more Water in oil emulsions are prepared by using an ultra-sonication device and used in an emulsion liquid membrane process in order to recover arsenic (V) ions from an aqueous medium. The aim of this work is the investigation of the effect of emulsifier concentration and composition, and also sonication time on the emulsion droplet size and the extraction efficiency in order to obtain stable emulsions with small droplets that favor the extraction. Results show that ultrasonic waves reduce internal droplet size which enhances the extraction of arsenic. In addition, internal droplet size is decreased initially and then increased by increasing Span 80 concentration. On the other hand, by increasing Span 80 concentration, extraction amount is increased and then decreased. Furthermore, emulsifier blends provide more stability for the emulsion. Increasing concentration of Tween 20 as a hydrophilic emulsifier up to an optimum concentration decreases internal droplet size and increases extraction amount. By increasing sonication time up to 4 min, the internal droplet size is decreased and the extraction amount is increased. If sonication time is increased further, the internal droplet size is increased and the extraction amount is decreased.
In this article, the extraction of arsenic(V) from water by means of emulsion liquid membrane is ... more In this article, the extraction of arsenic(V) from water by means of emulsion liquid membrane is investigated. The influence of operating factors such as stirring speed, concentration of sulfuric acid in the external aqueous phase, concentration of sodium sulfate in internal stripping phase, and concentration of carrier in the membrane phase on the extraction efficiency are investigated and their optimum
ABSTRACT The release of the wastes containing polybrominated diphenyl ethers into the environment... more ABSTRACT The release of the wastes containing polybrominated diphenyl ethers into the environment is a worldwide major concern. Investigation of spatial and temporal variations of polybrominated diphenyl ethers concentrations due to different factors, especially the ...
Abstract This study surveys the modeling and simulation of arsenic (v) extration through emulsion... more Abstract This study surveys the modeling and simulation of arsenic (v) extration through emulsion liquid membrane process from an aqueous medium using artificial neural networks (ANNs) and regression models. Water in oil emulsions were prepared by means ...
... S. Kiani Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of M... more ... S. Kiani Department of Chemical Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran; Membrane Processes and ... TGA was carried out to analyze the unsupported membrane's weight loss during calcination of alu-minatitania membranes. ...
Water in oil emulsions are prepared by using an ultra-sonication device and used in an emulsion l... more Water in oil emulsions are prepared by using an ultra-sonication device and used in an emulsion liquid membrane process in order to recover arsenic (V) ions from an aqueous medium. The aim of this work is the investigation of the effect of emulsifier concentration and composition, and also sonication time on the emulsion droplet size and the extraction efficiency in order to obtain stable emulsions with small droplets that favor the extraction. Results show that ultrasonic waves reduce internal droplet size which enhances the extraction of arsenic. In addition, internal droplet size is decreased initially and then increased by increasing Span 80 concentration. On the other hand, by increasing Span 80 concentration, extraction amount is increased and then decreased. Furthermore, emulsifier blends provide more stability for the emulsion. Increasing concentration of Tween 20 as a hydrophilic emulsifier up to an optimum concentration decreases internal droplet size and increases extraction amount. By increasing sonication time up to 4 min, the internal droplet size is decreased and the extraction amount is increased. If sonication time is increased further, the internal droplet size is increased and the extraction amount is decreased.
In this article, the extraction of arsenic(V) from water by means of emulsion liquid membrane is ... more In this article, the extraction of arsenic(V) from water by means of emulsion liquid membrane is investigated. The influence of operating factors such as stirring speed, concentration of sulfuric acid in the external aqueous phase, concentration of sodium sulfate in internal stripping phase, and concentration of carrier in the membrane phase on the extraction efficiency are investigated and their optimum
ABSTRACT The release of the wastes containing polybrominated diphenyl ethers into the environment... more ABSTRACT The release of the wastes containing polybrominated diphenyl ethers into the environment is a worldwide major concern. Investigation of spatial and temporal variations of polybrominated diphenyl ethers concentrations due to different factors, especially the ...
Abstract This study surveys the modeling and simulation of arsenic (v) extration through emulsion... more Abstract This study surveys the modeling and simulation of arsenic (v) extration through emulsion liquid membrane process from an aqueous medium using artificial neural networks (ANNs) and regression models. Water in oil emulsions were prepared by means ...
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