有机硅烷改性高岭土对锶的高容量吸附与固定化

IF 5.8 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science Pub Date : 2025-07-30 DOI:10.1016/j.clay.2025.107949

Li Zhu , Zheng Zhang , Xue Xiao , Daoyong Tan

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引用次数: 0

摘要

采用有机硅烷改性的高岭土对模拟核素Sr进行吸附和固定化。有机硅烷改性高岭土对锶的最大吸附量可达585.02 mg/g。锶主要吸附在有机硅烷改性高岭土的管腔中。有机硅烷改性的高岭土与锶的相互作用既有配位相互作用，也有静电相互作用。Sr吸附动力学符合准二级动力学模型。1100℃烧结使高岭土纳米管的管端闭合，将腔内吸附的Sr密封在烧结体内部，实现了Sr的稳定固定。模拟浸出实验表明，Sr具有良好的稳定性，28 d时Sr的浸出率低至1 × 10−4 g·m−2·d−1。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

High-capacity adsorption and immobilization of Sr in organosilane-modified halloysite

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High-capacity adsorption and immobilization of Sr in organosilane-modified halloysite

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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来源期刊

Applied Clay Science 地学-矿物学

CiteScore

10.30

自引率

10.70%

发文量

289

审稿时长

39 days

期刊介绍： Applied Clay Science aims to be an international journal attracting high quality scientific papers on clays and clay minerals, including research papers, reviews, and technical notes. The journal covers typical subjects of Fundamental and Applied Clay Science such as: • Synthesis and purification • Structural, crystallographic and mineralogical properties of clays and clay minerals • Thermal properties of clays and clay minerals • Physico-chemical properties including i) surface and interface properties; ii) thermodynamic properties; iii) mechanical properties • Interaction with water, with polar and apolar molecules • Colloidal properties and rheology • Adsorption, Intercalation, Ionic exchange • Genesis and deposits of clay minerals • Geology and geochemistry of clays • Modification of clays and clay minerals properties by thermal and physical treatments • Modification by chemical treatments with organic and inorganic molecules(organoclays, pillared clays) • Modification by biological microorganisms. etc...