Computation of the effect of pH on spur chemistry in water radiolysis at elevated temperatures

• Autorzy: Swiatla-Wojcik D.
• Konferencja: Proceedings of the 14th National Scientific Meeting of the Polish Radiation Society 24-26 Septemebr 2007, Kielce, Poland
• Języki publikacji: EN

Abstrakty

EN

Diffusion-kinetic model has been employed to calculate the effect of pH and associated ionic strength on the primary yields in the radiolysis of water from ambient temperature to 200°C. Account has been taken of the effect of ionic strength, I, up to 0.1 molźdm-3 in both acidic and alkaline solutions resulting from the addition of H+ and OH-,assuming the counter ions have unit charge. The primary yields are essentially independent of pH for I ? 10-4. AboveI = 10-4 molźdm-3 the primary yields of e-aq and H2 in acidic solutions decrease whereas the primary yields of the H atom, hydroxyl radical and hydrogen peroxide increase. At I >10-3 molźdm-3 in alkaline solutions, the OH radical and hydrogen peroxide are partially converted into Oo- and HO-2 , respectively. Increases in the total yields GoOH + GOo- and Ge-aq + GHo and a decrease in GH2O2 + GHO-2 have been found with increasing pH. At elevated temperatures the effect of pH is diminished. The temperature effect on the primary yields in acidic and alkaline solutions is nearly the same as in neutral water.

Słowa kluczowe

EN

effect of pH; radiolysis of water; elevated temperatures; diffusion-kinetic calculations

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2008
• Tom: Vol. 53, suppl. 1
• Strony: 31--37
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Swiatla-Wojcik D.

• Institute of Applied Radiation Chemistry, Technical University of Łódź, 116 Żeromskiego Str., 90-924 Łódź, Poland, Tel.: [phone], Fax: [phone],

Bibliografia

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