Radiolysis of cobalt(III)-1,2 bis(beta-aminoethoxy)ethane N,N,N',N' sodium sulfonate triacetic acid chelate |
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Authors: | M M El-Dessouky M W Abdel-Raouf |
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Institution: | (1) Military Technical College, Chemical Chair, Kobry El-Kobbah, Cairo, Egypt;(2) Hot Labs. and Waste Management Centre, Atomic Energy Authority, Cairo, Egypt |
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Abstract: | Chelation studies of cobalt(III) with 1,2 bis(beta-aminoethoxy)ethane N,N,N',N' sodium sulfonate triacetic acid (ASTA) were
performed. The results showed the effectiveness of ASTA as a chelating agent by using: molar ratio, continuous variation and
slope ratio methods. Stable complex 1∶1 was formed at pH from 6.0 to 10.5. Solutions of Co-ASTA chelate of different molar
ratios at pH 6.5 and 8.0 were irradiated by different gamma-radiation doses. The results showed a linear decrease of absorbance
with gamma-radiation dose which can be utilized as a dosimeter for low dose rate measurement in the range studied. A proposed
radiolytic mechanism is discussed. The degradation of the ASTA ligand has been related to hydroxyl radical attack. |
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