赤铁矿
硅酸
吸附
化学
无机化学
硅质
铁
氯化物
有机化学
地质学
针铁矿
地球化学
火山
作者
Naren Gaowa,Hironori Ohashi,Yoshihiro Okaue,T. Yokoyama
标识
DOI:10.1016/j.jcis.2013.02.032
摘要
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.
科研通智能强力驱动
Strongly Powered by AbleSci AI