Alshammari Abdulmalik S, Almeataq Mohammed S, Basfar Ahmed A
MSc in Nuclear Engineering Program, College of Engineering, King Saud University, Riyadh P.O. Box 11495, Saudi Arabia.
Nuclear Technologies Institute, King Abdulaziz City for Science and Technology, Riyadh P.O. Box 11442, Saudi Arabia.
Molecules. 2023 Jul 25;28(15):5642. doi: 10.3390/molecules28155642.
Contamination of underground water by uranium (U) and other heavy metals is a growing concern. Mesoporous silica nanoparticles (MSNs) have shown great potential as an adsorbent material for heavy metal removal. This study synthesized a novel MSN using surface-initiated atom transfer radical polymerization (SI-ATRP) and evaluated its effectiveness for removing uranium from aqueous solutions under different conditions. The particle size was reduced to 150-240 nm to enhance adsorption. Fourier transform infrared characterization and thermogravimetric analysis confirmed successful synthesis and modification. Results showed that the MSN adsorbent was highly effective in removing U, with a removal rate of 85.35% at 120 min. Temperature had a significant impact, with the highest removal rate of 96.7% achieved at 25 °C and a U concentration of 10 ppm. The highest removal rate of 91.89% was achieved at a pH of 6 and a U concentration of 50 ppm. The highest removal rate of 95.16% was achieved at 25 mg and a U concentration of 50 ppm at room temperature for 60 min. The MSNs also showed a 58.27% removal rate in a mixture solution at room temperature for 60 min. This study demonstrates the effectiveness of the MSN adsorbent for removing U under different conditions.
铀（U）和其他重金属对地下水的污染日益受到关注。介孔二氧化硅纳米颗粒（MSNs）作为一种去除重金属的吸附材料显示出巨大潜力。本研究采用表面引发原子转移自由基聚合（SI-ATRP）合成了一种新型MSN，并评估了其在不同条件下从水溶液中去除铀的有效性。为增强吸附作用，将粒径减小至150 - 240 nm。傅里叶变换红外光谱表征和热重分析证实了合成和改性的成功。结果表明，MSN吸附剂在去除铀方面非常有效，在120分钟时去除率为85.35%。温度有显著影响，在25°C、铀浓度为10 ppm时，去除率最高可达96.7%。在pH值为6、铀浓度为50 ppm时，去除率最高可达91.89%。在室温下、铀浓度为50 ppm、剂量为25 mg时作用60分钟，去除率最高可达95.16%。在室温下的混合溶液中作用60分钟，MSNs的去除率也达到了58.27%。本研究证明了MSN吸附剂在不同条件下去除铀的有效性。
