Sulfur dioxide transport through aqueous solutions: Part II. Experimental results and comparison with theory

Abstract

AbstractMeasurements were made of the steady state flux of sulfur dioxide through films of water and solutions of neutral and alkaline sodium salts (0.1 to 2.0 M sodium chloride, 10−3 to 3.0M sodium hydroxide, NaHSO3 or sodium sulfite) with sulfur dioxide partial pressures between 10 and 100Pa. In agreement with equilibrium theory (Part I), data from water and sodium chloride solutions show that HSO is responsible for 83 to 95% of the flux (facilitation factor F between 5 and 19). In alkaline solutions, HSO and other sulfur containing species cause F to be as large as 1 370. Equilibrium theory, however, overpredicts F by up to a factor of 7. The NEBLA (Part I) accounts for this deviation.