High-capacity adsorption and immobilization of Sr in organosilane-modified halloysite
Source abstract
Abstract
The simulated radionuclide Sr was adsorbed and immobilized by organosilane-modified halloysite. The maximum Sr adsorption amount of organosilane-modified halloysite reached to 585.02 mg/g. Sr was mainly adsorbed into the lumen of organosilane-modified halloysite. The interaction between organosilane-modified halloysite and Sr were both coordination interactions and electrostatic interactions. The Sr adsorption kinetics was well fitted with the pseudo-second-order kinetic model. Sintering at 1100 °C closed the tube end of halloysite nanotube, and sealed the lumen-adsorbed Sr into the internal of the sintered body, leading a steady immobilization of Sr. The simulated leaching experiment demonstrated an excellent stability of Sr. The leaching rate of Sr at 28 d was as low as 1 × 10 −4 g·m −2·d −1.
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Research context
OpenAlex topics: Clay minerals and soil interactions · Iron oxide chemistry and applications · Chemical Synthesis and Characterization
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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