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Environmental fate & pathways

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In accordance with column 2 of REACH Annex VII, studies on biodegradation are not applicable for inorganic substances. Biodegradation in water, sediment or soil is not applicable as environmental fate process for silicic acid, lithium salt.

Furthermore, silica is continuously removed from water by biochemical processes: diatoms, radiolarians, silicoflagellates, and certain sponges serve as a sink for silicon by incorporating it into their shells and skeletons as amorphous biogenic silica, frequently referred to as opal (SiO2· nH2O). They can deplete dissolved silica in surface waters to less than 1 mg/L during blooms (Edwards 1973).