深入研究氧化还原对钚吸附的影响

IF 3.5 3区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES

Journal of contaminant hydrology Pub Date : 2024-07-17 DOI:10.1016/j.jconhyd.2024.104400

Anna Yu. Romanchuk , Alexander L. Trigub , Stepan N. Kalmykov

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引用次数: 0

摘要

研究了在氧化和正常条件下，钚（VI）在合成的鹅绿泥石上的吸附情况，发现其与不同固/液比例的 pH 值有关。通过扩展 X 射线吸收精细结构（EXAFS）光谱分析了钚在固相上吸附时的标示特征，同时使用紫外可见光（UV-Vis）光谱和液液萃取法评估了溶液中的标示特征。所获得的结果表明，钚在所研究的体系中的行为存在差异。在氧化条件下，Pu(VI) 在鹅绿泥石表面和溶液中保持六价。而在正常条件下，钚（IV）稳定在矿物上，钚（V）则存在于溶液中。本研究提供了这些反应的热力学描述。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Going deeper into plutonium sorption affected by redox

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Going deeper into plutonium sorption affected by redox

Sorption of Pu(VI) onto synthesized goethite under oxidizing and normal conditions was investigated, which revealed its pH dependence on different solid/liquid ratios. Pu speciation upon sorption on the solid phase was characterized via extended X-ray absorption fine structure (EXAFS) spectroscopy, while that in solution was assessed using ultraviolet–visible (UV–Vis) spectroscopy and liquid–liquid extraction. The obtained results demonstrate differences in plutonium behavior in the studied systems. Pu(VI) remains hexavalent on the goethite surface and in solution under oxidizing conditions. While Pu(IV) is stabilized on the mineral and Pu(V) is found in solution under normal conditions. This study provides the thermodynamic descriptions of these reactions.

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来源期刊

Journal of contaminant hydrology 环境科学-地球科学综合

CiteScore

6.80

自引率

2.80%

发文量

129

审稿时长

68 days

期刊介绍： The Journal of Contaminant Hydrology is an international journal publishing scientific articles pertaining to the contamination of subsurface water resources. Emphasis is placed on investigations of the physical, chemical, and biological processes influencing the behavior and fate of organic and inorganic contaminants in the unsaturated (vadose) and saturated (groundwater) zones, as well as at groundwater-surface water interfaces. The ecological impacts of contaminants transported both from and to aquifers are of interest. Articles on contamination of surface water only, without a link to groundwater, are out of the scope. Broad latitude is allowed in identifying contaminants of interest, and include legacy and emerging pollutants, nutrients, nanoparticles, pathogenic microorganisms (e.g., bacteria, viruses, protozoa), microplastics, and various constituents associated with energy production (e.g., methane, carbon dioxide, hydrogen sulfide). The journal''s scope embraces a wide range of topics including: experimental investigations of contaminant sorption, diffusion, transformation, volatilization and transport in the surface and subsurface; characterization of soil and aquifer properties only as they influence contaminant behavior; development and testing of mathematical models of contaminant behaviour; innovative techniques for restoration of contaminated sites; development of new tools or techniques for monitoring the extent of soil and groundwater contamination; transformation of contaminants in the hyporheic zone; effects of contaminants traversing the hyporheic zone on surface water and groundwater ecosystems; subsurface carbon sequestration and/or turnover; and migration of fluids associated with energy production into groundwater.