The mechanism of polysulphide formation by γ-radiation of aqueous sodium sulphide (Na₂S) solutions was investigated.
The roles of solvated electron (ēaq ) and hydroxyl radicals (•OH), as primary products of water radiolysis, were studied in a systematic manner by using N₂O as ēaq and 2-propanol as •OH scavengers. Polysulphide formation in Na₂S solutions was found to be initiated by the oxidizing intermediate, the •OH radical.
The scavenger experiments were supplemented by other studies on effects of solute concentration, dose at a single dose rate, pH, oxygen and hydrogen sulphide (H₂S) saturation.
Rates of polysulphide formation increased according to presence of N₂O and H₂S, Na₂S concentration, irradiation dose and were highest at pH 7.0.
In these experiments, highest polysulphide yield, 14 g/l, was obtained in the 80 g/l aq Na₂S-H₂S system at pH 12.7 and exposed for 20 Mrad dosage.
The effect of oxygen was to increase radiation yield for lower dose ranges. At higher doses, however, G-values fluctuated markedly. / Forestry, Faculty of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/32775 |
| Date | January 1973 |
| Creators | You, Young-Soo |
| Publisher | University of British Columbia |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| Rights | For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use. |
Page generated in 0.0019 seconds