TY - JOUR
T1 - Adsorption kinetics of silicic acid on akaganeite
AU - Naren, Gaowa
AU - Ohashi, Hironori
AU - Okaue, Yoshihiro
AU - Yokoyama, Takushi
N1 - Funding Information:
This work was financially supported by the Steel Industry Foundation for the Advancement of Environmental Protection Technology and the Kyushu University Interdisciplinary Program in Education and Projects in Research Development.
PY - 2013/6/1
Y1 - 2013/6/1
N2 - As part of a series of studies on the interaction between ferric ions and silicic acid 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.
AB - As part of a series of studies on the interaction between ferric ions and silicic acid 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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U2 - 10.1016/j.jcis.2013.02.032
DO - 10.1016/j.jcis.2013.02.032
M3 - Article
C2 - 23538050
AN - SCOPUS:84875963773
SN - 0021-9797
VL - 399
SP - 87
EP - 91
JO - Journal of Colloid and Interface Science
JF - Journal of Colloid and Interface Science
ER -