What causes Langmuir circulation?
The generation mechanism of Langmuir circulations is an instability caused by interaction between the Stokes drift transport of surface waves and the wind-induced current, but Langmuir circulations may also be viewed as a distinct form of turbulence, named Langmuir turbulence.
What are the main points of Langmuir adsorption isotherm?
The Langmuir adsorption isotherm is used to describe the equilibrium between adsorbate and adsorbent system, where the adsorbate adsorption is limited to one molecular layer at or before a relative pressure of unity is reached.
What is the thermohaline circulation system?
Thermohaline circulation begins in the Earth’s polar regions. When ocean water in these areas gets very cold, sea ice forms. These deep-ocean currents are driven by differences in the water’s density, which is controlled by temperature (thermo) and salinity (haline). This process is known as thermohaline circulation.
What causes Ekman transport?
Ekman transport occurs when ocean surface waters are influenced by the friction force acting on them via the wind. As the wind blows it casts a friction force on the ocean surface that drags the upper 10-100m of the water column with it.
How is Langmuir constant calculated?
How can I plot the Langmuir adsorption isotherm? ce/qe = 1/qm KL + ce/qm , where ce is the equilibrium concentration of the adsorbate and qe is the adsorption capacity adsorbed at equilibrium, qm is maximum adsorption capacity and KL is the Langmuir adsorption constant.
How is a Langmuir related to a Torr?
It is named after American physicist Irving Langmuir . The langmuir is defined by multiplying the pressure of the gas by the time of exposure. One langmuir corresponds to an exposure of 10 −6 Torr during one second. For example, exposing a surface to a gas pressure of 10 −8 Torr for 100 seconds corresponds to 1 L.
How did the Langmuir unit get its name?
It is a practical unit, and is not dimensionally homogeneous, and so is used only in this field. It is named after American physicist Irving Langmuir . The langmuir is defined by multiplying the pressure of the gas by the time of exposure.
What are the assumptions of the Langmuir isotherm?
The Langmuir isotherm is based on the following assumptions: 1. The surface consists of a uniform two-dimensional array of identical adsorption sites. 2. The probability of adsorbing on or desorbing from a site is independent of the number of nearby molecules (the loading, θ ). 3.
Is the Freundlich model based on the Langmuir equation?
Langmuir adsorption isotherms are based on the assumption that the reactive groups are homogeneously distributed over the particulate’s surface and that there is no lateral interaction. As shown by Sposito [3] the Freundlich model results from integrating the Langmuir equation over the continuum.
