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- 저자 : Farouq S. Mjalli (검색결과 2 건)
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Investigating the electrochemical windows of ionic liquids
Maan Hayyan,Farouq S. Mjalli,Mohd Ali Hashim,Inas M. AlNashef,Tan Xue Mei 한국공업화학회 2013 Journal of Industrial and Engineering Chemistry Vol.19 No.1
The structure effect on the electrochemical windows (EWs) was studied using cyclic voltammetry (CV) in 16 ionic liquids (ILs), consisting of various cations such as piperidinium, pyridinium, pyrrolidinium,phosphonium, morpholinium, ammonium, sulfonium and imidazolium, and anions including bis(trifluoromethylsulfonyl)imide, tris(pentafluoroethyl)trifluorophosphate, dicyanamide, trifluoroacetate and trifluoromethanesulfonate. It was found that all studied ILs have good EWs to be utilized as electrolytes in different electrochemical applications pertaining to industry. Furthermore, it was found that the structure of ILs affected the EW and both the cation and anion have important effect on the reductive and oxidative limits, respectively. The reductive limits of the studied ILs were found to follow the sequence of [P14,666]+ > [N112,1O2]+ > [HMPyrr]+ > [BMPyrr]+ > [EMIm]+ > [MOEMMor]+≈[MOPMPip]+ > [S222]+ > [BMPy]+≈[HPy]+≈ [HPPy]+. The oxidative limits were found to follow the sequence of [TFSI]ˉ > [TPTP]ˉ > [TfO]ˉ > [DCA]ˉ > [TFA]ˉ. 2012 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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Aqueous Two-Phase Extraction of Amoxicillin Using Miniaturization Technology
Al-Saidi Said,Mjalli Farouq S.,Al-Azzawi Marwah,Al-Wahaibi Talal,Abutarboosh Belal,AlSaadi Mohammed A. 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.5
Antibiotics discharged with medical waste have had a negative impact on humans as well as aquatic organisms. Because of the severity of its eff ects and the frequency with which it appears in medical effl uent, extraction has become obligatory. Conducting mass transfer operations in microchannels is a promising technology that has several benefi ts over traditional methods. In this study, the potential of performing two-phase aqueous extraction of amoxicillin in a microchannel setup was investigated. To fully comprehend the process, it was necessary to study the system's hydrodynamics and consider the variables that had the greatest infl uence on the extraction in the microchannel. In the hydrodynamics part, the inlet junction showed an insignifi cant eff ect on the fl ow pattern type while the fl ow rate and volume fraction had a major eff ect. The plug fl ow zone was chosen for the microchannel extraction based on its high surface area and ease of separation. Aqueous two-phase system extraction (ATPS) was conducted in a microchannel to extract amoxicillin from the aqueous phase. Three process parameters were investigated, namely temperature, salt concentration, and volume fraction, which showed a direct proportionality infl uence on extraction effi ciency. The optimum operation conditions obtained were found to be, a temperature of 44.3 °C, a salt concentration of 42.6 wt.%, and a volume fraction of 0.45. This was accomplished in 1.96 min as compared to the 540 min reported for the conventional ATPS.
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