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Thanaporn Wannachod,Natchanun Leepipatpiboon,Ura Pancharoen,Kasidit Nootong 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
The separation of Nd(III) from lanthanide series via hollow fiber supported liquid membrane (HFSLM)using synergistic extractant was investigated. Optimum extraction and stripping obtained were 94.5%and 85.1% using D2EHPA and TOPO mixtures (0.5:0.5 M/M) as the synergistic extractant. Reaction orderfor both extraction and stripping were first-order with rate constants of 1.444 and 1.338 min1,respectively. The experimental results were used to correlate with the models. Results showed that theconcentration of Nd(III) from the experiment fitted in well with the model results. The average deviationwas 1.95% and 2.18% for predictions in both feed and stripping sides, respectively.
Thanaporn Wannachod,Natchanun Leepipatpiboon,Ura Pancharoen,Suphot Phatanasri 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
The mass transfer of Nd(III) via hollow fiber supported liquid membrane was studied. At pH 4.5 using0.5 M 2-ethylhexyl phosphonic acid mono-2-ethylhexyl ester as the extractant and 1 M H2SO4 as thestripping solution, optimum extraction and stripping reached 98% and 95%. Mass transfer resistance dueto chemical reaction proved to be of the highest value, i.e. 1/Ke = 5.871 102 s/cm. Thus, this indicatedthat the mass transfer resistance from the extraction was the most important. Further, themass transfermodel fitted in well with the experiment data. The average deviation in the feed side was below 5%.
Thanaporn Wannachod,Thidarat Wongsawa,Prakorn Ramakul,Ura Pancharoen,Soorathep Kheawhom 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.33 No.-
The mass transfer of synergistic extraction of uranium ions from monazite leach solution via HFSLM wasexamined. Optimum conditions for synergistic extraction were found to be pH 5 in the feed solution,0.1 M Cyanex 272 + 0.1 M TOPO in the liquid membrane and 2 M H2SO4 in the stripping solution at 30 8C. After a fourth cycle, the cumulative extraction and stripping of uranium ions reached 95% and 90%. Fractional resistance due to extraction reaction proved to be the highest value. This indicated that masstransfer resistance from the extraction was dominant. The controlling step is the chemical reaction.
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%.
Srestha Chaturabul,Thanaporn Wannachod,Natchanun Leepipatpiboon,Ura Pancharoen,Soorathep Kheawhom 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.21 No.1
The simultaneous extraction and stripping of mercury(II) from petroleum produced water via hollowfiber supported liquid membrane (HFSLM) was examined. Optimum conditions for extraction andstripping were pH 1 in feed solution, 5% (v/v) Aliquat 336 in the liquidmembrane and 0.05 Mthiourea inthe stripping solution. Percentages obtained for extraction and stripping of mercury(II) were 96.8% and92.5% which were below the legislation limit of 5 ppb. The overall mass transfer resistance (R) was7.286 102 s/cm. Results showed that themass transfer model fitted in well with the experimental data.
Krirkratthawit Wongkaew,Ura Pancharoen,Thanaporn Wannachod,Vanee Mohdee,Amornchai Arpornwichanop,Anchaleeporn W. Lothongkum 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.42 No.-
The separation of platinum (IV) from wastewater across hollow fiber supported liquid membrane wassuccessful in reaching 96% extraction and 88% stripping using 10% (v/v) trioctylmethyl-ammoniumchloride (Aliquat 336) as the extractant. The mass transfer resistances were (1/ka) 3.297 104 s/cm, (1/km) 0.164 104 s/cm, (1/ko) 3.404 104 s/cm and (1/K) 6.865 104 s/cm. The system was governed bythe mass transfer resistance from the liquid-membrane. Response surface methodology was used toqualify and estimate the influence of operating conditions. Predicted model with experimental data werein good agreement at a standard deviation of 1%.
Suphot Phatanasri,Ura Pancharoen,Dolapop Sribudda,Thanaporn Wannachod,Prakorn Ramakul 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.1
The separation of Hg(II) and As(V) from produced water by hollow fiber contactors was investigated. Two identical hollow fiber modules were employed. The first module was used for extraction, while the second module was used for stripping. The optimum conditions achieved were 14% (v/v) of Aliquat336, 0.07 M thiourea, volumetric flow rate of 100 mL/min for aqueous solution and 0.02 M HCl of stripping solution. At such conditions, the maximum extraction of Hg(II) and As(V) attained 100% and 78.78%, respectively. Concurrently, the maximum stripping of Hg(II) and As(V) reached 47.88% and 6.66%, respectively. The overall mass transfer coefficients of Hg(II) and As(V) extraction were 2.31×10−6 and 1.15×10−6m/s, while the Hg(II) and As(V) stripping exhibited the overall mass transfer coefficients of 8.37×10−7 m/s and 9.05×10−7 m/s, respectively. Mass transfer coefficients of the organic layer diffusion (k0) had the most effect on the overall mass transfer coefficients.
Teerapon Pirom,Ura Pancharoen,Natchanun Leepipatpiboon,Kraiwith Wongkaew,Thanaporn Wannachod 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
Separation of Co(II) and Mn(II) from sulphate media through triple HFSLM in series using D2EHPA was explored. Mn(II) was extracted preferentially over Co(II) at the pH value of 5, 100 ppm of Co(II) and Mn(II), 5% (v/v) of D2EHPA, 0.2 M HCl. The highest extraction percentage of Mn(II) was 98.14%, and Co(II) remained at 94.05% in the raffinate stream. The reaction order (n) and the reaction rate constant (kf) were found to be 1.00 and 0.0180 min 1, respectively. Furthermore, the reaction flux model proved to be in good agreement with the experimental data at an average deviation of 2.24%.