Henry’s law constants and hydration equilibrium constants of n-hexanal and their temperature dependence as determined by the rectangular pulse method

A laboratory study on the uptake of gaseous molecular iodine by clay minerals at different relative humidities

“…The parameters related to I 2 uptake on surfaces were determined by a simulation in which the parameters were fitted to reproduce the time series of x m ( t ) by using the parameter-fitting routine of FACSIMILE software (MCPA Software Ltd., UK). 22 It is briefly described in Section 3.…”

“…[26][27][28] The method for injecting and owing the gas mixture through the contactor was essentially the same as that reported for volatile organic compounds by the authors. 22 The gas ow was controlled with eight mass-ow controllers (d in Fig. 1) at rates listed in Table S1 in the ESI.…”

“…Unlike a previous study using the rectangular pulse method, 22 the adsorption processes examined here had a nonlinear relationship between rates and concentrations; hence, f m (t) could not be used as an input pulse in simulations to optimize parameters related to loss and adsorption of I 2 by clay samples in the contactor. Therefore, the input pulse signal in the simulation, f(t), was approximated on the basis of eqn (12) using where P 0 f(t) is the time series of I 2 in the input pulse, A np is a unit conversion factor, and s c is the residence time of I 2 -air(s) in the contactor:…”

“…Given these considerations, we conducted a laboratory study of I 2 uptake by various reactors, consisting of six different types of clay mineral particles and three different aqueous surfaces, to provide data for estimating R g for I 2 above soils. We used a rectangular pulse method 22 to distinguish loss of I 2 from adsorption onto the reactor. This method can be conducted under lower-atmospheric conditions such as humidified air at 1 atm.…”