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A Study on Dosimetric Characterization of Direct Yellow 12 Dye at High Radiation γ-Dose
Javaria Batool,Shaukat Ali Shahid,Ramiza,Nasim Akhtar,Afshan Naz,Maria Yaseen,Inam Ullah,Muhammad Nadeem,Imran Shakir 대한화학회 2012 Bulletin of the Korean Chemical Society Vol.33 No.7
Aqueous solution of oxygenated Direct yellow 12 dye has been evaluated spectrophotometrically as a possible gamma rays dosimeter. The neutral (pH-7), alkaline (pH-12.5) and acidic (pH-5.5) aqueous solution of the dye were prepared and exposed to various gamma doses. Absorption spectra of unirradiated and irradiated solutions were recorded at 400 nm peak. The increase in absorbance with the increase in irradiation dose was observed from 1 to 6 kGy. The stability response of the dye solution for different environmental conditions such as temperature (low & high), light and darkness were investigated during post irradiation storage for ten days. The dye solution showed high stability in darkness for the studied period. The optical density of the dye solution was found to be decreased at high temperature storage.
A Study on Dosimetric Characterization of Direct Yellow 12 Dye at High Radiation γ-Dose
Batool, Javaria,Shahid, Shaukat Ali,Ramiza, Ramiza,Akhtar, Nasim,Naz, Afshan,Yaseen, Maria,Ullah, Inam,Nadeem, Muhammad,Shakir, Imran Korean Chemical Society 2012 Bulletin of the Korean Chemical Society Vol.33 No.7
Aqueous solution of oxygenated Direct yellow 12 dye has been evaluated spectrophotometrically as a possible gamma rays dosimeter. The neutral (pH-7), alkaline (pH-12.5) and acidic (pH-5.5) aqueous solution of the dye were prepared and exposed to various gamma doses. Absorption spectra of unirradiated and irradiated solutions were recorded at 400 nm peak. The increase in absorbance with the increase in irradiation dose was observed from 1 to 6 kGy. The stability response of the dye solution for different environmental conditions such as temperature (low & high), light and darkness were investigated during post irradiation storage for ten days. The dye solution showed high stability in darkness for the studied period. The optical density of the dye solution was found to be decreased at high temperature storage.
Development of hybrid resin to reduce silica in borated water
Ramzan Akhtar,Shahid Latif,Syed Aizaz Ali Shah,Shaukat Saeed,Abdul Aziz Korean Nuclear Society 2023 Nuclear Engineering and Technology Vol.55 No.7
Amberlite IRN-78 resin was incorporated with iron to make a hybrid resin for the removal of silica from the borated water of nuclear power plants. The hybrid resin contained 0.84 wt % iron compounds upon pyrolysis. In batch experiments carried out at room temperature, 1 g of the hybrid resin removed ~60 ㎍ silica from 1 ppm borated water in ~120 min. The efficiency of the hybrid material increased with the resin quantity, decreased with silica concentration, and remained unchanged at different pH values. Freundlich and Temkin isothermal adsorption dominated the silica removal process and followed the pseudo-first-order and intra-particle diffusion mechanism simultaneously. The concentration of the leached iron remained appreciably under the safe limits of 200 ㎍/l during the experiments. This detailed study suggests the use of hybrid resin for the removal of silica from borated water streams and other similar systems.