Application of a Greek zeolite embedded with Fe-oxyhydroxides for uranium retention from aqueous solutions

IF 3 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Water, Air, & Soil Pollution Pub Date : 2025-04-02 DOI:10.1007/s11270-025-07923-1

Filippos Karantoumanis, Panagiotis Tsamos, Fotini Noli

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Abstract

A natural, HEU-type zeolite embedded with Fe-oxyhydroxides was prepared by a simple and fast precipitation method. The natural and treated sorbents were characterized by a variety of methods including X-Ray Diffraction, Fourier Transform Infrared Spectroscopy, Scanning Electron Microscopy and BET surface area, revealing the amorphous nature of the oxyhydroxides consisting of ferrihydrite and poorly crystalline goethite. The interactions of the sorbents with uranium aqueous solutions under varying conditions were subsequently investigated. Iron oxyhydroxide deposition enhanced the sorption properties of the natural zeolite (from 194.6 to 237.9 mg g^–1 at pH 4) while parameters such as pH, initial metal concentration, and presence of competing ions (Na⁺, Ca²⁺) as background electrolytes greatly affected the sorption capacities. Results from the materials characterization before and after sorption accompanied by fitting the experimental isothermal and kinetic data to mathematical models as well as thermodynamic calculations, showed that the sorption was due to a combination of surface complexation and ion exchange processes. Desorption and leaching tests provided insight into the influence of iron oxyhydroxides on uranium sorption behavior.

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含铁氢氧化物的希腊沸石在水溶液中保留铀的应用

采用简单快速的沉淀法制备了一种天然高浓铀型含铁氢氧沸石。通过x射线衍射、傅里叶变换红外光谱、扫描电镜和BET表面积等多种方法对天然吸附剂和处理过的吸附剂进行了表征，揭示了由水合铁和低晶针铁矿组成的氢氧化物的无定形性质。随后研究了不同条件下吸附剂与铀水溶液的相互作用。氢氧化铁沉积增强了天然沸石的吸附性能（pH值为4时从194.6 mg g-1提高到237.9 mg g-1），而pH值、初始金属浓度和竞争离子（Na+, Ca2+）作为背景电解质的存在等参数对吸附能力有很大影响。吸附前后的材料表征，并将实验等温和动力学数据拟合到数学模型和热力学计算中，结果表明吸附是由表面络合和离子交换过程共同作用的结果。解吸和浸出试验揭示了氧化铁对铀吸附行为的影响。

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来源期刊

Water, Air, & Soil Pollution 环境科学-环境科学

CiteScore

4.50

自引率

6.90%

发文量

448

审稿时长

2.6 months

期刊介绍： Water, Air, & Soil Pollution is an international, interdisciplinary journal on all aspects of pollution and solutions to pollution in the biosphere. This includes chemical, physical and biological processes affecting flora, fauna, water, air and soil in relation to environmental pollution. Because of its scope, the subject areas are diverse and include all aspects of pollution sources, transport, deposition, accumulation, acid precipitation, atmospheric pollution, metals, aquatic pollution including marine pollution and ground water, waste water, pesticides, soil pollution, sewage, sediment pollution, forestry pollution, effects of pollutants on humans, vegetation, fish, aquatic species, micro-organisms, and animals, environmental and molecular toxicology applied to pollution research, biosensors, global and climate change, ecological implications of pollution and pollution models. Water, Air, & Soil Pollution also publishes manuscripts on novel methods used in the study of environmental pollutants, environmental toxicology, environmental biology, novel environmental engineering related to pollution, biodiversity as influenced by pollution, novel environmental biotechnology as applied to pollution (e.g. bioremediation), environmental modelling and biorestoration of polluted environments. Articles should not be submitted that are of local interest only and do not advance international knowledge in environmental pollution and solutions to pollution. Articles that simply replicate known knowledge or techniques while researching a local pollution problem will normally be rejected without review. Submitted articles must have up-to-date references, employ the correct experimental replication and statistical analysis, where needed and contain a significant contribution to new knowledge. The publishing and editorial team sincerely appreciate your cooperation. Water, Air, & Soil Pollution publishes research papers; review articles; mini-reviews; and book reviews.