Adsorption Ratio


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Adsorption Ratio

The amount of a chemical adsorbed by a soil or sediment—the solid phase—divided by the amount of chemical in the solution phase, which is at equilibrium with the solid phase, at a fixed solid/solution ratio; the adsorption ratio is usually expressed as mg of chemical per gramme of soil or sediment.
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We also defined and tabulated an ammonium adsorption ratio, Am-AR, analogous to SAR and KAR, viz.
Ideas of this sort also led Richards (1954) to use the sodium adsorption ratio, SAR, defined by:
These experiments relate the potassium and sodium adsorption ratios, KAR and SAR, and their sum, MCAR, v.
64 Note: TDS: Total Dissolved Solids; EC: Electrical Conductance, SAR: Sodium Adsorption Ratio, SSP: Soluble Sodium Percentage, RSC: Residual Sodium Carbonate,; US: Un Suitable, M:Moderate, S:Suitable 1-: good to very good 2: good to hazardous Table 3: Relationship between water quality factors.
5 All parameters in mg/l except EC, pH and values of SAR, RSC and %Na in meq/l Table III: Classification of Sodium Adsorption ratio in groundwater.
Sodium adsorption ratio is the proportion of sodium to calcium and magnesium, which affect the availability of the water to the crop.
Less widely adopted than the SAR is the potassium adsorption ratio (PAR) defined by the concentrations of [K.
Exchangeable sodium percentage (ESP) in soils equilibrated with solutions of varying sodium and potassium adsorption ratios (SAR and PAR) in a ternary Na-K-Ca system The ESP is expressed as percentage of exchangeable [Na.
The objectives of study are two-fold; (a) to examine the effects of the sodium adsorption ratio at decreasing electrolyte concentration on the dynamics of the permeability along soil columns and (b) to assess the Na-Ca exchange reactions and dynamics of the electrolyte breakthrough in saturated soil columns.
The sodium adsorption ratio (SAR) relates the concentration of sodium to the concentration of calcium and magnesium.
The formula used for estimating sodium adsorption ratio is
Class I II III Suitability for Excellent to Good Good to Moderate Unfit Irrigation Electrical conductivity 1000 1000-3000 >3000 ([micro]mhos/cm) Total dissolved solids (mg/lit) Up to 700 700 to 2000 >2000 Sulfates (mg/lit) 0-192 192-480 >480 Chlorides (mg/lit) 0-142 142-355 >355 Table 3: Classification of water samples based on Sodium Adsorption Ratio [7].