isotherm


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Words related to isotherm

(meteorology) an isogram connecting points having the same temperature at a given time

References in periodicals archive ?
Agarwal, "Removal of Orange-G and Methyl Violet dyes by adsorption onto bagasse fly ash--kinetic study and equilibrium isotherm analyses," Dyes and pigments, vol.
Characteristics of the Moisture Sorption Isotherms. The experimental moisture sorption isotherm data for millet flour (MF) were obtained at 25, 40, and 55[degrees]C and water activity range from 0.1 to 0.9 (Figure 1) which exhibited sigmoidal shape (type II isotherm) [34].
A straight line for Langmuir plot shows that adsorption follows Langmuir's isotherm and [q.sub.m] and [K.sub.L] can be determined from the slope and intercept of the plot respectively.
This isotherm is extensively used to describe the sorption of solutes by soils [5].
Moreover, the essential characteristics of Langmuir isotherm can be explained in terms of a dimensionless constant separation factor or equilibrium parameter [R.sub.L], which is defined by
This isotherm equation has no Henry law (linear) behavior at low pressure and no saturation limit at high pressure.
A wide spectrum of Qmax and k values in P isotherm studies have been reported for both temperate and tropical soils.
In order to predict the behavior of adsorption isotherms, several authors have proposed empirical and theoretical mathematical models to fit the equilibrium moisture curves of various products as a function of the water activity (Bezerra, Costa, Afonso, Maia, & Clemente, 2011).
The essential features, separation factor (RL) of the Langmuir isotherm is expressed as:
Most of the data fitted the Freundlich isotherm very well except, SS3 and SS5 as shown in figure 2.
Second, [R.sub.d] was determined using the method proposed by van Genuchten and Parker (1984) where the [R.sub.d] is the area above the BTC; Third, the [R.sub.d] determination was performed by using the method proposed by Freeze and Cherry (1979) where the [R.sub.d] is equal to the pore volume when the relative concentration (C/[C.sub.0]) is 0.5; and Fourth, the [R.sub.d] was found by fitting the sorption isotherms, obtained through column test, to the linear, Freundlich and Langmuir isotherm models (Freeze and Cherry, 1979; Garga and O'Shaughnessy, 1994; Fetter, 1999; Asgari et al., 2014).
The simplest isotherm is the linear distribution coefficient (Kd), also called linear partition coefficient, is widely used to describe adsorption in soil [19].
The experimental isotherm of adsorption for Cr(VI) is shown in Fig.