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Radiolysis and Photolysis of the Aqueous Nitrate System

Malcolm Daniels

Open publisher page 17 citations

Abstract

Radiolysis of the aqueous nitrate system is discussed in terms of (a) indirect effect in dilute solution, and (b) concurrent indirect and direct effects in concentrated solution. Analysis of energy fractionation breaks down (b), gives G(NO 2 - ) NO3- = 4.0, and demonstrates stoichiometry for direct effect according to 2 NO 3 - → 2 NO 2 - + O 2 Scavening with H 2 and n-propyl alcohol quantitatively supports this. Pulse radiolysis shows NO 3 and NO 2 as intermediates, NO 3 being characteristic of concentrated solutions. Formation and decay of NO 3 is discussed. Primary process of direct radiolysis is formulated as NO 3 - > (NO 2 + O + e - ) cage, spur G(NO 2 - ) NO3- varies with scavenger and may attain ~17. From photochemical studies participation of lowest excited state is unlikely, but the second state at 6 e.v. may be involved.

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Radiolysis of the aqueous nitrate system is discussed in terms of (a) indirect effect in dilute solution, and (b) concurrent indirect and direct effects in concentrated solution. Analysis of energy fractionation breaks down (b), gives G(NO 2 - ) NO3- = 4.0, and demonstrates stoichiometry for direct effect according to 2 NO 3 - → 2 NO 2 - + O 2 Scavening with H 2 and n-propyl alcohol quantitatively supports this. Pulse radiolysis shows NO 3 and NO 2 as intermediates, NO 3 being characteristic of concentrated solutions. Formation and decay of NO 3 is discussed. Primary process of direct radiolysis is formulated as NO 3 - > (NO 2 + O + e - ) cage, spur G(NO 2 - ) NO3- varies with scavenger and may attain ~17. From photochemical studies participation of lowest excited state is unlikely, but the second state at 6 e.v. may be involved.

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Available abstract

Radiolysis of the aqueous nitrate system is discussed in terms of (a) indirect effect in dilute solution, and (b) concurrent indirect and direct effects in concentrated solution. Analysis of energy fractionation breaks down (b), gives G(NO 2 - ) NO3- = 4.0, and demonstrates stoichiometry for direct effect according to 2 NO 3 - → 2 NO 2 - + O 2 Scavening with H 2 and n-propyl alcohol quantitatively supports this. Pulse radiolysis shows NO 3 and NO 2 as intermediates, NO 3 being characteristic of concentrated solutions. Formation and decay of NO 3 is discussed. Primary process of direct radiolysis is formulated as NO 3 - > (NO 2 + O + e - ) cage, spur G(NO 2 - ) NO3- varies with scavenger and may attain ~17. From photochemical studies participation of lowest excited state is unlikely, but the second state at 6 e.v. may be involved.

Key concepts: Radiolysis, Aqueous solution, Chemistry, Scavenger, Photodissociation, Nitrate, Photochemistry, Radical

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