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EC number: 231-130-8
CAS number: 7440-21-3
Adsorption of dissolved silica to soil and sediments is not strong and it is relatively mobile in soil. Adsorption takes place primarily to inorganic materials and to a lesser extent to organic material. A value Koc < 10 L/kg can be given as a coarse calculated estimate (EUSES 2.1) . Measured Kd to activated carbon and starch were low 0.1-10. Measured Kd to minerals Bauxite, Limonite, Hematite and Goethite were between 100-1000.
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