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

IF 3.8 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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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.