کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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200901 | 460524 | 2016 | 10 صفحه PDF | دانلود رایگان |
A new spectroscopic method was developed to measure in situ the concentrations of dissolved sulfur (IV) species from SO2 absorption in electrolyte systems like seawater and desalination brine. In a recent paper we described UV spectroscopic measurements to fit a thermodynamic model yielding a considerably improved description of the absorption equilibrium. Now, combining this model with a comprehensive spectroscopic calibration, the molar absorptivities of the sulfur (IV) species (SO2(aq), HSO3−, SO32− und SO2Cl−) were determined for a wavelength range from 200 to 350 nm. With the molar absorptivities the concentrations of the sulfur species can be determined straight from a UV spectrum. The validity of the values was cross-checked in different electrolyte systems comparing calculated and measured spectra. The new method yields a very good representation of the species concentrations in SO2 absorption solutions.
Journal: Fluid Phase Equilibria - Volume 414, 25 April 2016, Pages 65–74