Health & Environmental Research Online (HERO)


Print Feedback Export to File
3237825 
Journal Article 
Simultaneous uptake of DMS and ozone on water 
Gershenzon, M; Davidovits, P; Jayne, JT; Kolb, CE; Worsnop, DR 
2001 
1 
Journal of Physical Chemistry A
ISSN: 1089-5639
EISSN: 1520-5215 
105 
29 
7031-7036 
WOS:000170152600010 
The simultaneous uptake of gas-phase DMS-O(3) Mixtures by
water as a function of temperature (274-300 K) was studied in a bubble train flow reactor. The
uptake data yielded the second-order rate constant for the aqueous-phase reaction DMS + O(3) -->
DMSO + O(2). The reaction products were established with NMR analysis. The reaction rate constant
k(2) was measured at four temperatures: 274, 283, 293, and 300 K, yielding (5.1 +/- 2.0) x 10(8)
M(-1) s(-1), (5.9 +/- 2.0) x 10(8) M(-1) s(-1), (8.6 +/- 3.6) x 10(8) M(-1) s(-1), and (11 +/-
4.5) x 10(8) M(-1) s(-1) respectively. It is noteworthy that the magnitude of the aqueous
reaction rate constant exceeds the corresponding gas-phase rate by a factor of about 10(6). The
atmospheric importance of the aqueous-phase DMS/O(3) reaction is discussed.