Abstract：
Extraction of U(VI) in water is of great significance in energy and environmental fields. However, the traditional methods usually fail due to the indispensable extra addition of catalyst, adsorbent, precipitant, or sacrificial agents, which may lead to enhanced extraction costs and secondary pollution. Here, a new efficient uranium extraction strategy is proposed based on triboelectricity without adding a catalyst or other additives. It is found only under the friction between the microbubbles (generated under ultrasonication) and the water flow, that reactive oxygen species (ROS) can largely be generated, which thus contributes to the solidification of U(VI) from water. In addition, the magnetic field can affect the phase of the product. Under mechanical stirring, the product contains (UO2)O2·2H2O, while which contains UO2(OH)2 and (UO2)O2·4H2O under the magnetic stirring. Quenching experiments are also carried out to explore the influence of environmental factors. Most importantly, it shows great potential in the extraction of U(VI) from seawater. This work proposes a catalyst-free and light-free strategy toward the solidification of U(VI) from water, which avoids the secondary pollution of the catalyst to the environment and is low-cost, and has great potential in the real application.
摘要：
水中U(VI)的提取在能源和环境领域具有重要意义。然而,传统方法通常由于不可缺少的额外添加催化剂而失败，吸附剂，沉淀剂,或牺牲剂，这可能导致开采成本增加和二次污染。这里,提出了一种基于摩擦电而不添加催化剂或其他添加剂的高效铀提取策略。它仅在微泡（在超声处理下产生）和水流之间的摩擦下发现，可以大量产生活性氧（ROS），因此，这有助于U（VI）从水中固化。此外,磁场会影响产品的相位。在机械搅拌下，该产品含有（UO2）O2·2H2O，其中在磁力搅拌下含有UO2(OH)2和(UO2)O2·4H2O。还进行了淬火实验，以探索环境因素的影响。最重要的是,它在从海水中提取U（VI）方面显示出巨大的潜力。这项工作提出了一种无催化剂和无光的策略，用于从水中固化U（VI），避免了催化剂对环境的二次污染，成本低，在实际应用中具有很大的潜力。
