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Hossein Ghanadzadeh Gilani,Syrous Noury,Shain Asan 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.6
Liquid-liquid equilibrium (LLE) data for the system of (water+formic acid+2-ethyl-1-hexanol) were experimentally determined at T=(298.2, 308.2, 318.2, and 328.2) K and atmospheric pressure. A type-2 LLE was obtained for this ternary system. The influence of temperature on the equilibrium characteristics was found to be smallat the temperatures studied. Distribution coefficients and separation factors were calculated over the immiscibility regions. The experimental tie-line data were correlated using the UNIQUAC model. The values of the interaction parameters between each pair of the components were obtained for this thermodynamic model. The root mean square deviation (RMSD) between the observed and calculated mass fractions was 0.61%.
Ali Ghanadzadeh Gilani,Hossein Ghanadzadeh Gilani,Seyedeh Laleh Seyed Saadat,Elham Nasiri-Touli,Mahrokh Peer 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.4
Liquid-liquid phase equilibrium (LLE) data were determined for the (water+propionic or butyric acid+1- heptanol) ternary systems at T=(298.15, 308.15, and 318.15) K and p=101.3 kPa. For both systems, a type-1 LLE phase diagram was obtained. The quality of the experimental LLE data was determined through the Othmer-Tobias and Bancroft equations. The experimental tie-lines were fitted using the UNIQUAC and NRTL correlation models. For the studied systems, a comparison was made between the experimental and correlated distribution coefficients and separation factors. The LSER model of Katritzky was applied to obtain the contributions of intermolecular interactions in these systems.
Milad Sangashekan,Shahin Asan,Hossein Ghanadzadeh Gilani 한국섬유공학회 2019 Fibers and polymers Vol.20 No.7
In this study, graphene oxide was synthesized and investigated as an adsorbent for eosin B elimination. Thefeatures and structure of graphene oxide were determined by employing scanning electron microscopy, transmission electronmicroscopy, Raman spectrometry, and X-ray diffractometry. Graphene oxide can remove dyes in water solutions, but it isconfronted by separation challenges. Therefore, zinc oxide was used as a coagulant for separation of the dye solution fromgraphene oxide. Adsorption properties such as contact time, dye concentration, dosage of adsorbent, zinc oxide content, pHeffect, and temperature were regularly investigated extensively. Concentrations of dyes in the supernatant suspension wereevaluated employing a visible spectrophotometric method at the maximum wavelength (λmax) of 514 nm. The eosin B dyeshowed maximum sorption capacity of 68.027 mg/g at pH 4 and T=298 K. Isotherm models such as Freundlich andLangmuir isotherms were used to determine the better suitable isotherm model. It was discovered that this dye adsorptioncapacity on adsorbent particles was monolayer and had a good agreement with the Langmuir isotherm. Pseudo-first-order andpseudo-second-order kinetic models were investigated to determine adsorption kinetics. The pseudo-second-order forsorption of this dye on adsorbents was followed by kinetic data analysis. This research shows that this sorbent and coagulantare efficacious and applicable for the removal of eosin B from wastewaters.