There are few effective technologies for the sequestration of highly water-soluble pertechnetate (TcO₄⁻) from contaminated water despite the urgency of environmental and public health concerns. In this work, anion exchanged and cetyltrimethylammonium bromide (CTAB) functionalized MIL-101-Cr-NO₃ were investigated for perrhenate (ReO₄⁻), a surrogate of TcO₄⁻, sequestration from artificial groundwater. Cl⁻, I⁻, and CF₃SO₃⁻ exchanged MIL-101-Cr proved more effective at ReO₄⁻ removal than the parent MIL-101-Cr-F. Compared to the parent framework, CTAB functionalized MIL-101-Cr-NO₃ increased ReO₄⁻ removal capacity from 39 to 139 mg/g, improved the reaction kinetics from ~30 to <10 min to reach full adsorption capacity and the selectivity for ReO₄⁻ over competing NO₃⁻, CO₃²⁻, SO₄²⁻, and Cl⁻. Spectroscopic data indicated that the chemical speciation of Re in the exchanged MIL-101-Cr remained ReO₄⁻, indicating synergistic sequestration through both anion exchange and non-ion exchange binding with the positively charged ligand of CTAB. These studies foreshadow potential applications of MOFs for the remediation of ⁹⁹TcO₄⁻ from contaminated environments.

很少有有效的技术为高水溶性高锝酸盐的封存（TCO ₄ ^- ）从受污染的水，尽管对环境和公众健康问题的紧迫性。在这项工作中，阴离子交换和十六烷基三甲基铵（CTAB）官能MIL-101-Cr系NO ₃进行了调查高铼酸盐（REO ₄ ^- ），TCO的替代₄ ^- ，从人工地下水封存。氯^-，我^-，和CF ₃ SO ₃ ^-交换MIL-101-的Cr在REO证明更有效的₄ ^-去除率高于母体MIL-101-Cr-F。相比于亲本框架内，CTAB官能MIL-101-Cr系NO ₃增加REO ₄ ^-去除能力从39至139毫克/克，改善从〜30中的反应动力学至<10分钟以达到充分的吸附能力和选择性REO ₄ ^-优于竞争NO ₃ ^-，CO ₃ ^2-，SO ₄ ^2-和Cl ^- 。光谱数据表明，再在化学形态交换MIL-101-铬保持REO ₄ ^-，表明通过阴离子交换和非离子交换与CTAB带正电荷的配体的结合而进行的螯合。这些研究预示了整治MOFs材料的潜在应用⁹⁹ TCO ₄ ^-从污染的环境。