Adsorption kinetics of SILICIC ACID (cas 1343-98-2) on akaganeite
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Add time:08/31/2019 Source:sciencedirect.com
As part of a series of studies on the interaction between ferric ions and SILICIC ACID (cas 1343-98-2) in the hydrosphere, the adsorption of silicic acid on akaganeite was investigated kinetically at various pH values. The adsorption of silicic acid increased with increasing pH over an initial pH range of 4–11.5. In the kinetic experiment, the Cl− was released from akaganeite much faster than silicic acid was adsorbed. From this result, we concluded that chloride ions bound on the surface of akaganeite are released and Fe–OH or Fe–O− sites are formed, which then acts as an adsorption site for silicic acid. The uptake mechanism of silicic acid by akaganeite is significantly different from that by schwertmannite, despite the presence of the same tunnel structure.
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