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Sira Suren,Ura Pancharoen,Soorathep Kheawhom 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
An investigation on the separation of Pb(II) from synthetic wastewater via a hollow fiber supported liquid membrane (HFSLM) and its model is presented. Maximum percentages of Pb(II) extraction and stripping achieved were 97% and 30% using 0.03 M D2EHPA as the extractant, 0.9 M HCl as the stripping solution. The extraction and stripping of Pb(II) were second-order reaction with reaction rate constants of 0.03 and 0.19 L/mg s, respectively. A mathematical model is developed and shows that the model results fit in well with the experimental results. Average percent deviation was 3% for predictions in both feed and stripping sides.
Watcharapong Ampronpong,Sira Suren,Vanee Mohdee,Kreangkrai Maneeintr,Sanong Ekgasit,Tatchanok Prapasawat,Wikorn Punyain,Ura Pancharoen 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.3
This work presents the separation of trace Ni(II) from aqueous solution via liquid-liquid extraction. The application of vegetable oils (rice bran, soybean and sunflower oil) as alternative green solvents was evaluated. Results demonstrate that D2EHPA dissolved in rice bran oil provides the highest extraction of Ni(II), whereas D2EHPA dissolved in kerosene reveals much lower performance. Furthermore, extraction of Ni(II) dramatically increases when the binary system of D2EHPA/1-octanol is applied, suggesting the occurrence of synergism having the synergistic coefficient=3.580. Under optimum conditions, extraction and stripping of Ni(II) achieved 99.70% and 88.00%, complying with the wastewater discharge limit in Thailand. Herein, a novel approach involving supramolecular mechanisms via density functional theory in a binary system of D2EHPA/1-octanol is first reported. Results show that intermolecular hydrogen bonds play an important role in supramolecular complexing. Fourier transform infrared spectrometer is analyzed to verify the functional groups in which the reactions occur. Significant numeric results are as follows: kextraction=0.134 s−1, kstripping=0.038 s−1, ΔH0=72.759 kJ/mol and ΔS0=0.268 kJ/mol·K.
Natthapol Traiwongsa,Sira Suren,Ura Pancharoen,Kasidit Nootong,Kreangkrai Maneeintr,Wikorn Punyain,Anchaleeporn W. Lothongkum 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.117 No.-
This work focuses on the separation of mercury ions from synthetic produced wastewater via hollowfiber supported liquid membrane (HFSLM). Standard sunflower oil is used as a non-toxic extractantand solvent for mercury ions separation from wastewater. Under optimal conditions: 20 ppm NaCl inwastewater, 0.1 M thiourea in 0.5 M HCl as stripping solution, flow rates of feed and stripping solutionsof 100 mL/min, and temperature 323 K, percentages of extraction and stripping reach 98% and 81%,respectively. The mechanisms of extraction and stripping reactions were investigated via the densityfunctional theory (DFT). For the extraction, a linoleic acid extracted HgCl2 and formed halogen bond. For the stripping, two protonated thiourea stripped HgCl2 and formed covalent and halogen bonds. According to the thermodynamics study, extraction reaction is found to be endothermic (DH0Ex = 1,001. 00 J/mol), irreversible (DS0Ex = 3.45 J/mol K), and spontaneous, (DG0Ex@323 K = 112.65 J/mol). Finally, themathematical model including conservation, convection, diffusion, reaction, and accumulation wasdeveloped. The differences of mercury ions concentration in feed and stripping phases from the experimentsand the predicted data from the mathematical model were 5% and 2%, respectively indicating thatthe model is acceptable.
Thanaporn Wannachod,Vanee Mohdee,Sira Suren,Prakorn Ramakul,Ura Pancharoen,Kasidit Nootong 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.26 No.-
The separation of Nd(III) via hollow fiber supported liquid membrane (HFSLM) and mass transfer analysis was studied. At pH of 4.5, 0.5 M DNPPA as extractant, 3 M H2SO4 as stripping solution, flow rates of feed and stripping solutions of 100 mL/min and temperature of feed and stripping solutions of 313 K. Optimum extraction and stripping reached 98% and 95%. The mass transfer due to chemical reaction is the mass transfer—controlling step. The experiment data fitted in well with the mass transfer model. The average deviation in the feed side was below 2%.