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Bare and polyelectrolyte-coated calcium carbonate particles for seawater uranium extraction: an eco-friendly alternative
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-08-17 , DOI: 10.1039/d0se00785d Jérémie Courtois 1, 2, 3, 4 , Bin Wang 1, 2, 3, 4 , Isaac N. Abonee 1, 2, 3, 4 , Xiong Kun 1, 2, 3, 4 , Qiang Tian 1, 2, 3, 4 , Minhao Yan 1, 2, 3, 4 , Alain Gibaud 1, 2, 3, 4, 5
Sustainable Energy & Fuels ( IF 5.0 ) Pub Date : 2020-08-17 , DOI: 10.1039/d0se00785d Jérémie Courtois 1, 2, 3, 4 , Bin Wang 1, 2, 3, 4 , Isaac N. Abonee 1, 2, 3, 4 , Xiong Kun 1, 2, 3, 4 , Qiang Tian 1, 2, 3, 4 , Minhao Yan 1, 2, 3, 4 , Alain Gibaud 1, 2, 3, 4, 5
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Large scale extraction of uranium from oceans for energetic or decontamination purposes is becoming credible as more and more efficient adsorbing materials are developed. Although these sorbents are intended to be massively spread in ecosystems, there is still a lack of eco-friendly solutions. Calcium carbonate is a biocompatible material naturally present in marine environments. In this study, pure CaCO3 particles and their hybrid versions coated with poly(acrylic acid) (CaCO3-PAA) and poly(ethyleneimine) (CaCO3-PEI) are presented as environment-friendly alternatives. Uranium extraction capabilities of CaCO3, CaCO3-PAA and CaCO3-PEI were assessed in artificial seawater containing 2.8 to 10 000 ppb of uranium in order to simulate both natural and contaminated conditions. Stability of uranium/particle complexes was also investigated. CaCO3 and CaCO3-PEI are suitable for uranium harvesting at 2.8 ppb (removal rate > 62%) while all types of particles perform excellently under highly contaminated conditions with an advantage for CaCO3-PEI which shows the best selectivity toward uranium. Polyelectrolyte coatings were found to stabilize uranium/particle complexes whereas taken up uranium was almost completely self-released from bare CaCO3 over 6 days. Such behavior, in addition to CaCO3 biocompatibility, efficiency and cost-effectiveness, opens the way for simplification of extraction processes as no desorption step is required.
中文翻译：
裸露和聚电解质涂覆的碳酸钙颗粒，用于海水铀提取：一种生态友好的替代品
随着越来越多的高效吸附材料的开发，从海洋中大量提取铀以进行高能或去污染的目的已变得可信。尽管这些吸附剂打算在生态系统中大量传播，但仍然缺乏生态友好型解决方案。碳酸钙是海洋环境中天然存在的生物相容性材料。在这项研究中，提出了纯的CaCO 3颗粒及其混合版本，它们涂覆了聚丙烯酸（CaCO 3 -PAA）和聚（乙烯亚胺）（CaCO 3 -PEI）作为环保替代品。CaCO 3，CaCO 3 -PAA和CaCO 3的铀提取能力-PEI在含有2.8至10000 ppb铀的人造海水中进行了评估，以模拟自然条件和受污染条件。还研究了铀/粒子复合物的稳定性。CaCO 3和CaCO 3 -PEI适用于2.8 ppb（去除率> 62％）的铀收获，而所有类型的颗粒在高度污染的条件下均具有出色的性能，而CaCO 3 -PEI的优势在于对铀的最佳选择性。发现聚电解质涂层能稳定铀/颗粒复合物，而吸收的铀在6天之内几乎完全从裸露的CaCO 3中自动释放。这种行为，除了CaCO 3 生物相容性，效率和成本效益，为简化提取过程开辟了道路，因为不需要解吸步骤。
更新日期：2020-09-29
中文翻译：
裸露和聚电解质涂覆的碳酸钙颗粒，用于海水铀提取：一种生态友好的替代品
随着越来越多的高效吸附材料的开发，从海洋中大量提取铀以进行高能或去污染的目的已变得可信。尽管这些吸附剂打算在生态系统中大量传播，但仍然缺乏生态友好型解决方案。碳酸钙是海洋环境中天然存在的生物相容性材料。在这项研究中，提出了纯的CaCO 3颗粒及其混合版本，它们涂覆了聚丙烯酸（CaCO 3 -PAA）和聚（乙烯亚胺）（CaCO 3 -PEI）作为环保替代品。CaCO 3，CaCO 3 -PAA和CaCO 3的铀提取能力-PEI在含有2.8至10000 ppb铀的人造海水中进行了评估，以模拟自然条件和受污染条件。还研究了铀/粒子复合物的稳定性。CaCO 3和CaCO 3 -PEI适用于2.8 ppb（去除率> 62％）的铀收获，而所有类型的颗粒在高度污染的条件下均具有出色的性能，而CaCO 3 -PEI的优势在于对铀的最佳选择性。发现聚电解质涂层能稳定铀/颗粒复合物，而吸收的铀在6天之内几乎完全从裸露的CaCO 3中自动释放。这种行为，除了CaCO 3 生物相容性，效率和成本效益，为简化提取过程开辟了道路，因为不需要解吸步骤。
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