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Papers by Wiranee Sriwiang

Hydrogeology Journal, Apr 27, 2022

The Quaternary sequences in the Phrae Basin, northern Thailand, can be classified into three aqui... more The Quaternary sequences in the Phrae Basin, northern Thailand, can be classified into three aquifers based on depth. The groundwater dynamics and recharge of these aquifers were assessed using isotope techniques, and flow directions were acquired using groundwater level of selected wells. Groundwater flows from northwest and west to the centre of the basin on the western side of the Yom River, while flow is from northeast and east to centre on the eastern side. The groundwater mean residence time (MRT) within the shallow aquifer is 1–30 years using 3H time series, estimated by the exponential piston-flow model (EPM), which is one option of the selected lumped-parameter model (TracerLPM). Groundwater in the shallow aquifer mainly originated from local rainfall and surface water. Recharge rates were estimated using MRT and chloride mass balance, with results of 305 mm year−1 and 301–309 mm year−1, respectively. The groundwater age range (1,087–22,920 years BP) was determined by 14C dating and corrected using 14C-DIC models. The horizontal velocities of the deep aquifer were between 3 and 5 m year−1, and vertical velocity was ~0.0235 m year−1 based on 14C ages and depth. Groundwater in the intermediate and deep aquifers was recharged mainly from local rainfall at 220–300 m above mean sea level. Interactions between groundwater and river water were detected close to the Yom River when it was in full flow. These findings on groundwater dynamics and quantity could aid water resource management within the Phrae Basin.

Journal of Physics: Conference Series, 2019

Yttrium-90 (Y-90) is a radioisotope having a short half-life of 64 hours and emitting high energy... more Yttrium-90 (Y-90) is a radioisotope having a short half-life of 64 hours and emitting high energy beta radiation at 2.28 MeV. It becomes one of the radionuclides being used for the targeted cancer treatment. Y-90 can be generated from radioactive decay of strontium-90 (Sr-90), which is one of the fission products of uranium fuel in the nuclear reactor. Y-90 must be highly pure and free from Sr-90 and other metal ions to achieve high efficient uses. Process for separation and purification of Y-90 from Sr-90 by extraction chromatographic technique has been investigated using two columns packed with different types of solvent impregnated resins namely, 0.3 M di(2-ethylhexyl) phosphoric acid (D2EHPA) in dodecane and 1.0 M n-octyl(phenyl)-N,N-diisobutylcarbamoyl-methylphosphine oxide (CMPO) in tri-n-butyl phosphate (TBP). Feed solutions used in the study were the mixture of the stable isotopes Y and Sr in HNO 3 at the concentration ratio Y:Sr of 0.18:756 simulating the equilibrium composition ratio of their radionuclides, Y-90 and Sr-90. Yttrium product yield and recovery of Sr were compared with the separation using a set of commercially available Sr resins and RE resin. High purity of Y product could be obtained from combined columns of D2EHPA and CMPO resins and yield of Y higher than 75% could be achieved. Performance of the in-house prepared resins was evaluated by separation the sample of 90 Sr-90 Y radionuclides in equilibrium. The extracted Y-90 was quantified for Sr-90 contamination by recounting after 30 days decayed with about 1x10-5 Bq 90 Sr per Bq of 90 Y. The extraction chromatographic process was found to be easy to operate continuously and there is no need for the treatment of the intermediate solution in the process.

Atmosphere

This study reports the mass concentrations, elemental characterization and identification of the ... more This study reports the mass concentrations, elemental characterization and identification of the possible sources of PM2.5 and PM10 at a suburban site in Pathum Thani, Thailand. The sampling was done from 18 February 2021 to 14 September 2021. PM2.5 concentrations were between 0.39 μg/m3 and 174.26 μg/m3, while PM10 concentration ranged from 12.75 μg/m3 to 242.02 μg/m3. The average concentration of PM2.5 in the wet season (61.96 μg/m3) in the study area exceeded the national ambient air quality standards (NAAQS). Particle-induced X-ray emission (PIXE) was used to measure the element concentrations. The main elements, namely Fe, K, Cr and Ca, in both PM2.5 and PM10 showed significantly higher concentrations in the summer season. A qualitative inter-elemental correlation analysis, principal component analysis (PCA) and cluster analysis (CA) were applied for source identification of PM2.5 and PM10. The results for the three procedures were in good agreement. Four and three factors of s...

Hydrogeology Journal

The Quaternary sequences in the Phrae Basin, northern Thailand, can be classified into three aqui... more The Quaternary sequences in the Phrae Basin, northern Thailand, can be classified into three aquifers based on depth. The groundwater dynamics and recharge of these aquifers were assessed using isotope techniques, and flow directions were acquired using groundwater level of selected wells. Groundwater flows from northwest and west to the centre of the basin on the western side of the Yom River, while flow is from northeast and east to centre on the eastern side. The groundwater mean residence time (MRT) within the shallow aquifer is 1–30 years using 3H time series, estimated by the exponential piston-flow model (EPM), which is one option of the selected lumped-parameter model (TracerLPM). Groundwater in the shallow aquifer mainly originated from local rainfall and surface water. Recharge rates were estimated using MRT and chloride mass balance, with results of 305 mm year−1 and 301–309 mm year−1, respectively. The groundwater age range (1,087–22,920 years BP) was determined by 14C dating and corrected using 14C-DIC models. The horizontal velocities of the deep aquifer were between 3 and 5 m year−1, and vertical velocity was ~0.0235 m year−1 based on 14C ages and depth. Groundwater in the intermediate and deep aquifers was recharged mainly from local rainfall at 220–300 m above mean sea level. Interactions between groundwater and river water were detected close to the Yom River when it was in full flow. These findings on groundwater dynamics and quantity could aid water resource management within the Phrae Basin.

Journal of Physics: Conference Series, 2019

Bombesin is a 14-amino-acid peptide having the ability to specifically bind gastrin releasing pep... more Bombesin is a 14-amino-acid peptide having the ability to specifically bind gastrin releasing peptide receptors (GRPR) which show over-expression in many types of cancer cells. Therefore, bombesin analogs have been complexed with radionuclides and reported as radiopharmaceuticals for cancer diagnosis and therapy. Lutetium-177 (Lu-177) is a beta emitting radionuclide that decays with a half-life of 6.65 days. The medium beta energy and the relatively long half-life of Lu-177 make it one of the ideal radionuclides used in targeted radionuclide therapy. As the oxidation state of this radioisotope is 3+, it requires multidentate chelators such as DOTA to form stable complex. In this work, the commercially available conjugated peptide, DOTA-[Pro1, Tyr4]-bombesin, was labeled with Lu-177 for preliminary formulation as a therapeutic radiopharmaceutical. The aim was to evaluate the radiolabeling efficiency using various amounts of the peptide and the stability in human serum for 7 days. The...

Yttrium-90 (Y-90) is a radioisotope having a short half-life of 64 hours and emitting high energy... more Yttrium-90 (Y-90) is a radioisotope having a short half-life of 64 hours and emitting high energy beta radiation at 2.28 MeV. It becomes one of the radionuclides being used for the targeted cancer treatment. Y-90 can be generated from radioactive decay of strontium-90 (Sr90), which is one of the fission products of uranium fuel in the nuclear reactor. Y-90 must be highly pure and free from Sr-90 and other metal ions to achieve high efficient uses. Process for separation and purification of Y-90 from Sr-90 by extraction chromatographic technique has been investigated using two columns packed with different types of solvent impregnated resins namely, 0.3 M di(2-ethylhexyl) phosphoric acid (D2EHPA) in dodecane and 1.0 M n-octyl(phenyl)N,N-diisobutylcarbamoyl-methylphosphine oxide (CMPO) in tri-n-butyl phosphate (TBP). Feed solutions used in the study were the mixture of the stable isotopes Y and Sr in HNO3 at the concentration ratio Y:Sr of 0.18:756 simulating the equilibrium compositi...

Yttrium-90 (Y-90) is one of radionuclides used widely for cancer treatment and it can be generate... more Yttrium-90 (Y-90) is one of radionuclides used widely for cancer treatment and it can be generated by radioactive decay of strontium-90 (Sr-90). It is essential to obtain Y-90 with high purity and free from Sr-90. Process for separation and purification of Y by extraction chromatography technique has been investigated using 2 columns of solvent impregnated resins. First column was packed with XAD-16 resin impregnated with solvent of 0.3 M di(2-ethylhexyl) phosphoric acid (D2EHPA) in dodecane and the second column was packed with XAD-16 resin impregnated with solvent of 1.0 M n-octyl(phenyl)-N,N-diisobutylcarbamoyl-methylphosphine oxide (CMPO) in tri-n-butyl phosphate (TBP). Feed solution used in the study was the mixture of Y and Sr in 0.3 M HNO 3 having concentration of 700 and 0.2 mg/L, respectively resembling the usual composition ratio of these radionuclides used for the feed. Feed solution was loaded into the first column at 0.3 mL/min and 7 M HNO 3 was used to elute the adsorb...

Yttrium-90 (Y-90) is one of radionuclides used widely for cancer treatment and it can be generate... more Yttrium-90 (Y-90) is one of radionuclides used widely for cancer treatment and it can be generated by radioactive decay of strontium-90 (Sr-90). It is essential to obtain Y-90 with high purity and free from Sr-90. Process for separation and purification of Y by extraction chromatography technique has been investigated using 2 columns of solvent impregnated resins. First column was packed with XAD-16 resin impregnated with solvent of 0.3 M di(2-ethylhexyl) phosphoric acid (D2EHPA) in dodecane and the second column was packed with XAD-16 resin impregnated with solvent of 1.0 M n-octyl(phenyl)-N,N-diisobutylcarbamoyl-methylphosphine oxide (CMPO) in tri-n-butyl phosphate (TBP). Feed solution used in the study was the mixture of Y and Sr in 0.3 M HNO 3 having concentration of 700 and 0.2 mg/L, respectively resembling the usual composition ratio of these radionuclides used for the feed. Feed solution was loaded into the first column at 0.3 mL/min and 7 M HNO 3 was used to elute the adsorb...

Hydrogeology Journal, Apr 27, 2022

The Quaternary sequences in the Phrae Basin, northern Thailand, can be classified into three aqui... more The Quaternary sequences in the Phrae Basin, northern Thailand, can be classified into three aquifers based on depth. The groundwater dynamics and recharge of these aquifers were assessed using isotope techniques, and flow directions were acquired using groundwater level of selected wells. Groundwater flows from northwest and west to the centre of the basin on the western side of the Yom River, while flow is from northeast and east to centre on the eastern side. The groundwater mean residence time (MRT) within the shallow aquifer is 1–30 years using 3H time series, estimated by the exponential piston-flow model (EPM), which is one option of the selected lumped-parameter model (TracerLPM). Groundwater in the shallow aquifer mainly originated from local rainfall and surface water. Recharge rates were estimated using MRT and chloride mass balance, with results of 305 mm year−1 and 301–309 mm year−1, respectively. The groundwater age range (1,087–22,920 years BP) was determined by 14C dating and corrected using 14C-DIC models. The horizontal velocities of the deep aquifer were between 3 and 5 m year−1, and vertical velocity was ~0.0235 m year−1 based on 14C ages and depth. Groundwater in the intermediate and deep aquifers was recharged mainly from local rainfall at 220–300 m above mean sea level. Interactions between groundwater and river water were detected close to the Yom River when it was in full flow. These findings on groundwater dynamics and quantity could aid water resource management within the Phrae Basin.

Journal of Physics: Conference Series, 2019

Yttrium-90 (Y-90) is a radioisotope having a short half-life of 64 hours and emitting high energy... more Yttrium-90 (Y-90) is a radioisotope having a short half-life of 64 hours and emitting high energy beta radiation at 2.28 MeV. It becomes one of the radionuclides being used for the targeted cancer treatment. Y-90 can be generated from radioactive decay of strontium-90 (Sr-90), which is one of the fission products of uranium fuel in the nuclear reactor. Y-90 must be highly pure and free from Sr-90 and other metal ions to achieve high efficient uses. Process for separation and purification of Y-90 from Sr-90 by extraction chromatographic technique has been investigated using two columns packed with different types of solvent impregnated resins namely, 0.3 M di(2-ethylhexyl) phosphoric acid (D2EHPA) in dodecane and 1.0 M n-octyl(phenyl)-N,N-diisobutylcarbamoyl-methylphosphine oxide (CMPO) in tri-n-butyl phosphate (TBP). Feed solutions used in the study were the mixture of the stable isotopes Y and Sr in HNO 3 at the concentration ratio Y:Sr of 0.18:756 simulating the equilibrium composition ratio of their radionuclides, Y-90 and Sr-90. Yttrium product yield and recovery of Sr were compared with the separation using a set of commercially available Sr resins and RE resin. High purity of Y product could be obtained from combined columns of D2EHPA and CMPO resins and yield of Y higher than 75% could be achieved. Performance of the in-house prepared resins was evaluated by separation the sample of 90 Sr-90 Y radionuclides in equilibrium. The extracted Y-90 was quantified for Sr-90 contamination by recounting after 30 days decayed with about 1x10-5 Bq 90 Sr per Bq of 90 Y. The extraction chromatographic process was found to be easy to operate continuously and there is no need for the treatment of the intermediate solution in the process.

Atmosphere

This study reports the mass concentrations, elemental characterization and identification of the ... more This study reports the mass concentrations, elemental characterization and identification of the possible sources of PM2.5 and PM10 at a suburban site in Pathum Thani, Thailand. The sampling was done from 18 February 2021 to 14 September 2021. PM2.5 concentrations were between 0.39 μg/m3 and 174.26 μg/m3, while PM10 concentration ranged from 12.75 μg/m3 to 242.02 μg/m3. The average concentration of PM2.5 in the wet season (61.96 μg/m3) in the study area exceeded the national ambient air quality standards (NAAQS). Particle-induced X-ray emission (PIXE) was used to measure the element concentrations. The main elements, namely Fe, K, Cr and Ca, in both PM2.5 and PM10 showed significantly higher concentrations in the summer season. A qualitative inter-elemental correlation analysis, principal component analysis (PCA) and cluster analysis (CA) were applied for source identification of PM2.5 and PM10. The results for the three procedures were in good agreement. Four and three factors of s...

Hydrogeology Journal

The Quaternary sequences in the Phrae Basin, northern Thailand, can be classified into three aqui... more The Quaternary sequences in the Phrae Basin, northern Thailand, can be classified into three aquifers based on depth. The groundwater dynamics and recharge of these aquifers were assessed using isotope techniques, and flow directions were acquired using groundwater level of selected wells. Groundwater flows from northwest and west to the centre of the basin on the western side of the Yom River, while flow is from northeast and east to centre on the eastern side. The groundwater mean residence time (MRT) within the shallow aquifer is 1–30 years using 3H time series, estimated by the exponential piston-flow model (EPM), which is one option of the selected lumped-parameter model (TracerLPM). Groundwater in the shallow aquifer mainly originated from local rainfall and surface water. Recharge rates were estimated using MRT and chloride mass balance, with results of 305 mm year−1 and 301–309 mm year−1, respectively. The groundwater age range (1,087–22,920 years BP) was determined by 14C dating and corrected using 14C-DIC models. The horizontal velocities of the deep aquifer were between 3 and 5 m year−1, and vertical velocity was ~0.0235 m year−1 based on 14C ages and depth. Groundwater in the intermediate and deep aquifers was recharged mainly from local rainfall at 220–300 m above mean sea level. Interactions between groundwater and river water were detected close to the Yom River when it was in full flow. These findings on groundwater dynamics and quantity could aid water resource management within the Phrae Basin.

Journal of Physics: Conference Series, 2019

Bombesin is a 14-amino-acid peptide having the ability to specifically bind gastrin releasing pep... more Bombesin is a 14-amino-acid peptide having the ability to specifically bind gastrin releasing peptide receptors (GRPR) which show over-expression in many types of cancer cells. Therefore, bombesin analogs have been complexed with radionuclides and reported as radiopharmaceuticals for cancer diagnosis and therapy. Lutetium-177 (Lu-177) is a beta emitting radionuclide that decays with a half-life of 6.65 days. The medium beta energy and the relatively long half-life of Lu-177 make it one of the ideal radionuclides used in targeted radionuclide therapy. As the oxidation state of this radioisotope is 3+, it requires multidentate chelators such as DOTA to form stable complex. In this work, the commercially available conjugated peptide, DOTA-[Pro1, Tyr4]-bombesin, was labeled with Lu-177 for preliminary formulation as a therapeutic radiopharmaceutical. The aim was to evaluate the radiolabeling efficiency using various amounts of the peptide and the stability in human serum for 7 days. The...

Yttrium-90 (Y-90) is a radioisotope having a short half-life of 64 hours and emitting high energy... more Yttrium-90 (Y-90) is a radioisotope having a short half-life of 64 hours and emitting high energy beta radiation at 2.28 MeV. It becomes one of the radionuclides being used for the targeted cancer treatment. Y-90 can be generated from radioactive decay of strontium-90 (Sr90), which is one of the fission products of uranium fuel in the nuclear reactor. Y-90 must be highly pure and free from Sr-90 and other metal ions to achieve high efficient uses. Process for separation and purification of Y-90 from Sr-90 by extraction chromatographic technique has been investigated using two columns packed with different types of solvent impregnated resins namely, 0.3 M di(2-ethylhexyl) phosphoric acid (D2EHPA) in dodecane and 1.0 M n-octyl(phenyl)N,N-diisobutylcarbamoyl-methylphosphine oxide (CMPO) in tri-n-butyl phosphate (TBP). Feed solutions used in the study were the mixture of the stable isotopes Y and Sr in HNO3 at the concentration ratio Y:Sr of 0.18:756 simulating the equilibrium compositi...

Yttrium-90 (Y-90) is one of radionuclides used widely for cancer treatment and it can be generate... more Yttrium-90 (Y-90) is one of radionuclides used widely for cancer treatment and it can be generated by radioactive decay of strontium-90 (Sr-90). It is essential to obtain Y-90 with high purity and free from Sr-90. Process for separation and purification of Y by extraction chromatography technique has been investigated using 2 columns of solvent impregnated resins. First column was packed with XAD-16 resin impregnated with solvent of 0.3 M di(2-ethylhexyl) phosphoric acid (D2EHPA) in dodecane and the second column was packed with XAD-16 resin impregnated with solvent of 1.0 M n-octyl(phenyl)-N,N-diisobutylcarbamoyl-methylphosphine oxide (CMPO) in tri-n-butyl phosphate (TBP). Feed solution used in the study was the mixture of Y and Sr in 0.3 M HNO 3 having concentration of 700 and 0.2 mg/L, respectively resembling the usual composition ratio of these radionuclides used for the feed. Feed solution was loaded into the first column at 0.3 mL/min and 7 M HNO 3 was used to elute the adsorb...

Yttrium-90 (Y-90) is one of radionuclides used widely for cancer treatment and it can be generate... more Yttrium-90 (Y-90) is one of radionuclides used widely for cancer treatment and it can be generated by radioactive decay of strontium-90 (Sr-90). It is essential to obtain Y-90 with high purity and free from Sr-90. Process for separation and purification of Y by extraction chromatography technique has been investigated using 2 columns of solvent impregnated resins. First column was packed with XAD-16 resin impregnated with solvent of 0.3 M di(2-ethylhexyl) phosphoric acid (D2EHPA) in dodecane and the second column was packed with XAD-16 resin impregnated with solvent of 1.0 M n-octyl(phenyl)-N,N-diisobutylcarbamoyl-methylphosphine oxide (CMPO) in tri-n-butyl phosphate (TBP). Feed solution used in the study was the mixture of Y and Sr in 0.3 M HNO 3 having concentration of 700 and 0.2 mg/L, respectively resembling the usual composition ratio of these radionuclides used for the feed. Feed solution was loaded into the first column at 0.3 mL/min and 7 M HNO 3 was used to elute the adsorb...