Registration Dossier
Registration Dossier
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EC number: 295-362-1 | CAS number: 92044-83-2
Adsorption / desorption
Administrative data
Link to relevant study record(s)
Description of key information
Potassium is an essential macronutrient in aquatic and terrestrial ecosystems. Dissolved potassium occurs in solution as dissociated K+ ions. Although K is an abundant element, its mobility in soils, sediments and suspended matter is limited since it is readily incorporated into clay lattices and it is adsorbed more strongly than Na+ to the surfaces of clay minerals and organic matter (Salminen, 2005).A European median log Kp value of 3.99 L/kg is derived for sediment-water partitioning.
Key value for chemical safety assessment
Other adsorption coefficients
- Type:
- log Kp (solids-water in sediment)
- Value in L/kg:
- 3.99
Other adsorption coefficients
- Type:
- other: desorption coefficient Kd (water-soil) miscible displacement technique, min. Kd
- Value in L/kg:
- 1.2
Other adsorption coefficients
- Type:
- other: desorption coefficient Kd (water-soil) miscible displacement technique, max. Kd
- Value in L/kg:
- 10.9
Additional information
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