Uranium removal in aqueous solution by different sizes of commercial Fe3O4 microparticles: key role of oxygen vacancies
IF 3.2
3区 工程技术
Q1 NUCLEAR SCIENCE & TECHNOLOGY
引用次数: 0
Abstract
Fe3O4 microparticles have been investigated for U(VI) removal. However, the effect of the size of Fe3O4 microparticles on U(VI) removal has not been investigated. Herein, four different sizes (100, 200, 300 mesh, and nano) of commercial Fe3O4 microparticles were used to investigate the size effect on U(VI) removal. The results showed that Fe3O4 microparticles with a size of 200 mesh (Fe3O4-200) showed the best removal efficiency with a removal capacity of 19.3 mg/g. Characterization analysis showed that Fe3O4 microparticles with 100 and 300 mesh and nano consisted of Fe3O4 phase, whereas Fe3O4-200 was made up of Fe2O3 and Fe3O4 phase. The combination of Fe2O3 and Fe3O4 phase produced more oxygen vacancies, which endowed Fe3O4-200 with a superior removal capacity for U(VI). The solution pH affected U(VI) removal by Fe3O4-200. When the solution pH was 5.0, the U(VI) removal efficiency reached a maximum value. The effect of chloride ions was concentration-dependent, whereas sulfate ions slightly inhibited U(VI) removal. Carbonate ions strongly inhibited U(VI) removal. The U(VI) removal fitted the pseudo-second-order kinetics equation and Langmuir model well. Further thermodynamic analysis proved that Fe3O4-200 has high reaction ability with U(VI). Fe3O4-200 can be reused, and the adsorbed U(VI) can be easily recovered using sodium carbonate, sodium acetate, hydrochloric acid and sodium hydroxide. This study provides insight into U(VI) removal by different sizes of Fe3O4 microparticles, and paves a new avenue for designing highly efficient adsorbents for U(VI) removal from water bodies.
不同尺寸的商业Fe3O4微粒对水溶液中铀的去除：氧空位的关键作用
研究了Fe3O4微粒对U（VI）的去除效果。然而，Fe3O4颗粒大小对U（VI）去除率的影响尚未得到研究。本文采用四种不同尺寸（100、200、300目和纳米）的工业Fe3O4微颗粒，研究了尺寸对去除U（VI）的影响。结果表明，粒径为200目（Fe3O4-200）的Fe3O4微粒的去除率最高，去除率为19.3 mg/g。表征分析表明，100目和300目纳米级Fe3O4微粒由Fe3O4相组成，而Fe3O4-200由Fe2O3和Fe3O4相组成。Fe2O3与Fe3O4相结合产生更多的氧空位，使Fe3O4-200对U（VI）具有较好的去除能力。溶液pH影响Fe3O4-200对U（VI）的去除。当溶液pH为5.0时，对U（VI）的去除率达到最大值。氯离子对U（VI）的去除有浓度依赖性，而硫酸盐离子对U（VI）的去除有轻微的抑制作用。碳酸盐离子强烈抑制U（VI）的去除。U（VI）的去除符合拟二级动力学方程和Langmuir模型。进一步的热力学分析证明了Fe3O4-200与U（VI）具有较高的反应能力。Fe3O4-200可以重复使用，吸附后的U（VI）可以用碳酸钠、乙酸钠、盐酸和氢氧化钠回收。本研究为不同粒径Fe3O4微粒对U（VI）的去除提供了新的思路，为设计高效去除水体中U（VI）的吸附剂开辟了新的途径。
本文章由计算机程序翻译，如有差异，请以英文原文为准。
求助全文
约1分钟内获得全文
求助全文
来源期刊
Progress in Nuclear Energy
工程技术-核科学技术
CiteScore
5.30
自引率
14.80%
发文量
331
审稿时长
3.5 months
期刊介绍：
Progress in Nuclear Energy is an international review journal covering all aspects of nuclear science and engineering. In keeping with the maturity of nuclear power, articles on safety, siting and environmental problems are encouraged, as are those associated with economics and fuel management. However, basic physics and engineering will remain an important aspect of the editorial policy. Articles published are either of a review nature or present new material in more depth. They are aimed at researchers and technically-oriented managers working in the nuclear energy field.
Please note the following:
1) PNE seeks high quality research papers which are medium to long in length. Short research papers should be submitted to the journal Annals in Nuclear Energy.
2) PNE reserves the right to reject papers which are based solely on routine application of computer codes used to produce reactor designs or explain existing reactor phenomena. Such papers, although worthy, are best left as laboratory reports whereas Progress in Nuclear Energy seeks papers of originality, which are archival in nature, in the fields of mathematical and experimental nuclear technology, including fission, fusion (blanket physics, radiation damage), safety, materials aspects, economics, etc.
3) Review papers, which may occasionally be invited, are particularly sought by the journal in these fields.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
