A pulse radiolysis study on the transient products of radiolytic transformations of selenite and selenate ions in aqueous solutions

Journal Article · Sun Jan 01 04:00:00 EST 1995 · High Energy Chemistry

OSTI ID:135989

Chulkov, V N; Kartasheva, L I; Pikaev, A K ^[1]

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1. Institute of Physical Chemistry, Moscow (Russian Federation)

Transient products of radiolytic transformations of selenite and selenate ions in aqueous solutions were studied using the technique of pulse radiolysis. Rate constants of the reactions of OH radicals with selenite and selenate ions [equal to (1.6{plus_minus}0.2)x10{sup 9} and (3.9{plus_minus}0.8)x10{sup 5} dm{sup 3} mol{sup {minus}1}s{sup {minus}1}, respectively], and of e{sub aq} with selenate ions [(1.4{plus_minus}0.2)x10{sup 9}dm{sup 3}mol{sup {minus}1}s{sup {minus}1}], along with the decay rate constants of SeO{sup {minus}}{sub 3} and SeO{sup {minus}}{sub 4} [2k=(1.2{plus_minus}0.2)x10{sup 9} and (6.8 {plus_minus}0.7)x10{sup 7}x10{sup 7}dm{sup 3}mol{sup {minus}1}s{sup {minus}1}, respectively] were measured. Molar absorption coefficients were determined for SeO{sup {minus}}{sub 3},{epsilon}(420)=(1.6{plus_minus}0.2)x10{sup 3}and {epsilon}(580)=(6.3 {plus_minus}0.7)x10{sup 2}dm{sup 3}mol{sup {minus}1}cm{sup {minus}1} and SeO{sup {minus}}{sub 4},{epsilon}(590)=(1.3{plus_minus}0.3)x10{sup 3}dm{sup 3}mol{sup {minus}1}cm{sup {minus}1}.

• OSTI ID: 135989
• Journal Information: High Energy Chemistry, Journal Name: High Energy Chemistry Journal Issue: 1 Vol. 29; ISSN 0018-1439; ISSN HIECAP
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
ABSORPTION SPECTROSCOPY
AQUEOUS SOLUTIONS
CHEMICAL REACTION KINETICS
HYDROXYL RADICALS
RADIOLYSIS
SELENATES
SELENITES