Kinetics and mechanism of electron-transfer reactions of aquothallium(III) and coordinated thallium(III). 13. Reduction of thallium(III) by nitrous acid in perchloric acid solution

1977 ◽  
Vol 16 (6) ◽  
pp. 1399-1404 ◽  
Author(s):  
B. M. Thakuria ◽  
Y. K. Gupta
Keyword(s):  
Electron Transfer ◽  
Acid Solution ◽  
Perchloric Acid ◽  
Nitrous Acid ◽  
Kinetics And Mechanism ◽  
Transfer Reactions ◽  
Perchloric Acid Solution ◽  
Electron Transfer Reactions

scholarly journals Surprisingly small HONO emissions from snow surfaces at Browning Pass, Antarctica

2006 ◽  
Vol 6 (9) ◽  
pp. 2569-2580 ◽  
Author(s):  
H. J. Beine ◽  
A. Amoroso ◽  
F. Dominé ◽  
M. D. King ◽  
M. Nardino ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Organic Compounds ◽  
Nitrous Acid ◽  
Uv Light ◽  
Transfer Reactions ◽  
Snow Surface ◽  
Reactive Medium ◽  
Electron Transfer Reactions ◽  
Fresh Snow ◽  
Photochemical Modeling

Abstract. Measured Fluxes of nitrous acid at Browning Pass, Antarctica were very low, despite conditions that are generally understood as favorable for HONO emissions, including: acidic snow surfaces, an abundance of NO3- anions in the snow surface, and abundant UV light for NO3- photolysis. Photochemical modeling suggests noon time HONO fluxes of 5–10 nmol m-2 h-1; the measured fluxes, however, were close to zero throughout the campaign. The location and state of NO3- in snow is crucial to its reactivity. The analysis of soluble mineral ions in snow reveals that the NO3- ion is probably present in aged snows as NaNO3. This is peculiar to our study site, and we suggest that this may affect the photochemical reactivity of NO3-, by preventing the release of products, or providing a reactive medium for newly formed HONO. In fresh snow, the NO3- ion is probably present as dissolved or adsorbed HNO3 and yet, no HONO emissions were observed. We speculate that HONO formation from NO3- photolysis may involve electron transfer reactions of NO2 from photosensitized organics and that fresh snows at our site had insufficient concentrations of adequate organic compounds to favor this reaction.

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