摘要：研究 Ta 掺杂六方相氧化钨(hex-WO3)材料在吸附 Sr 2+ 过程中其表面 zeta 电位的变化情况，并进一步探 讨了吸附过程的热力学及吸附机理。结果表明：(1) 在实验 pH 值范围内，Ta 掺杂 hex-WO3悬浮液的 zeta 电 位值随溶液中电解质的价态增大而增大；(2) 且 zeta 电位随体系中离子强度的增加而增大；(3) Ta 掺杂 hex-WO3对 Sr 2+ 的吸附容量随着温度降低而增大，随着离子强度的增加而减少；(4) 吸附过程的吸附焓为-47 kJ• mol -1 ，且 Sr 2+ 离子与材料表面之间主要为化学相互作用；(5) Ta 掺杂 hex-WO3对 Sr 2+ 吸附过程主要为材料表 面吸附及材料孔道内离子交换共同作用。 关键词：Ta；hex-WO3；Zeta 电位；Sr 2+ ；吸附机理 中图分类号：O647

In order to study the stability of perovskite-type SrTiO3 used for immobilizing Y3+, Sr (NO3)2, TiO2 and Y2O3 are used as starting materials. The synthesized Y2O3-doped SrTiO3 can be generally represented as Sr1-1.5xYxTiO3 (0≤ x≤0.12) with the high temperature solid reaction. The phases, structures and microcosmic shapes of synthetic condensates are characterized by the X-ray diffraction, Raman and scanning electron microscopy, and long-term chemical stability is studied at 90 ℃. The results indicate that the phases of compounds change from perovskite to pyrocholre phase when the value of x is more than 0.08. The leaching rates of Sr2+ and Y3+ in waste form increase with the increase of immersion time. The highest leaching concentrations of Sr2+ and Y3+ for 42-day immersion are no more than 0.004 and 0.02 μg·mL-1, respectively.