Gharsallah Sana, Khitouni Nawel, Mallah Abdulrahman, Alsawi Abdulrahman, Alluhayb Abdullah H, Khitouni Mohamed, Charnay Clarence, Chemingui Mahmoud
Laboratory of Inorganic Chemistry, LR17-ES-07, Faculty of Science, University of Sfax, Sfax 3018, Tunisia.
Department of Chemistry, College of Science, Qassim University, Buraydah 51452, Saudi Arabia.
Materials (Basel). 2024 May 1;17(9):2132. doi: 10.3390/ma17092132.
A serious risk that harms the safe use of water and affects aquatic ecosystems is water pollution. This occurs when the water's natural equilibrium is disrupted by an excessive amount of substances, both naturally occurring and as a byproduct of human activities, that have varied degrees of toxicity. Radiation from Cs isotopes, which are common components of radioactive waste and are known for their long half-lives (30 years), which are longer than the natural decay processes, is a major source of contamination. Adsorption is a commonly used technique for reducing this kind of contamination, and zeolite chabazite has been chosen as the best adsorbent for cesium in this particular situation. The purpose of this research is to investigate a composite material based on magnesium phosphate cement (MPC). Magnesium oxide (MgO), potassium dihydrogen phosphate (KHPO), and properly selected retarders are used to create the MPC. The optimal conditions for this composite material are investigated through the utilization of X-ray diffraction, scanning electron microscopy, BET surface area analysis, and atomic absorption spectroscopy. The principal aim is to enable innovations in the elimination of radioactive waste-contaminated water using effective cesium removal. The most promising results were obtained by using KHPO as an acid, and MgO as a base, and aiming for an M/P ratio of two or four. Furthermore, we chose zeolite chabazite as a crucial component. The best adsorption abilities for Cs were found at Q = 106.997 mg/g for S and Q = 122.108 mg/g for S. As a result, zeolite is an eco-friendly material that is a potential usage option, with many benefits, such as low prices, stability, and ease of regeneration and use.
水污染是一种严重危害水的安全使用并影响水生生态系统的风险。当水的自然平衡被过量的物质扰乱时就会发生水污染，这些物质既有天然存在的，也有人类活动产生的副产品，它们具有不同程度的毒性。铯同位素的辐射是主要的污染源，铯同位素是放射性废物的常见成分，以其长半衰期（30年）而闻名，其半衰期比自然衰变过程更长。吸附是一种常用的减少此类污染的技术，在这种特定情况下，菱沸石已被选为铯的最佳吸附剂。本研究的目的是研究一种基于磷酸镁水泥（MPC）的复合材料。氧化镁（MgO）、磷酸二氢钾（KHPO）和适当选择的缓凝剂用于制备MPC。通过利用X射线衍射、扫描电子显微镜、BET表面积分析和原子吸收光谱来研究这种复合材料的最佳条件。主要目标是通过有效的铯去除实现消除放射性废物污染水方面的创新。使用KHPO作为酸，MgO作为碱，并将M/P比设定为2或4时获得了最有希望的结果。此外，我们选择菱沸石作为关键成分。对于S，发现Cs的最佳吸附能力在Q = 106.997 mg/g，对于S，Q = 122.108 mg/g。因此，沸石是一种环保材料，是一种潜在的使用选择，具有许多优点，如价格低廉、稳定性好以及易于再生和使用。
