结晶岩石对镭、钡的吸附与沉淀；实验结果和模型开发

IF 1.5 3区化学 Q3 CHEMISTRY, ANALYTICAL

Journal of Radioanalytical and Nuclear Chemistry Pub Date : 2025-01-07 DOI:10.1007/s10967-024-09966-w

Otto Fabritius, Xiaodong Li, Tatiana Sorokina, Anna-Maria Jakobsson, Tiina Sojakka, Marja Siitari-Kauppi

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引用次数: 0

摘要

通过间歇式吸附沉淀实验和地球化学模拟，研究了Ra和Ba在结晶岩上的吸附沉淀过程。通过沉淀实验，得到（Ba,Ra）SO4的实验分配系数λ和RaSO4的溶解度常数s。结果表明，特别是在低总盐度和/或SO4和Ba含量较高的地下水中，Ra被强烈地从溶液中去除，并发生共沉淀和吸附。建立了一个新的地球化学模型，成功地解释了实验结果。用SEM/EDX分析直接观察了岩石矿物中BaSO4(s)的析出物。

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Radium and barium sorption and precipitation on crystalline rock; experimental results and modeling development

The sorption and precipitation of Ra and Ba on crystalline rock was studied with batch sorption and precipitation experiments, and geochemical modeling. Following the precipitation experiments, (Ba,Ra)SO₄ experimental partition coefficient (λ) and RaSO₄(s) solubility constant values were obtained. It was observed that especially in groundwaters of low overall salinity, and/or of high SO₄ and Ba content, Ra is strongly removed from the solution to both coprecipitation and sorption. A new geochemical model was developed which successfully interprets the experimental results. The precipitates of BaSO₄(s) were directly observed with the rock minerals with a SEM/EDX analysis.

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来源期刊

Journal of Radioanalytical and Nuclear Chemistry 化学-分析化学

CiteScore

2.80

自引率

18.80%

发文量

504

审稿时长

2.2 months

期刊介绍： An international periodical publishing original papers, letters, review papers and short communications on nuclear chemistry. The subjects covered include: Nuclear chemistry, Radiochemistry, Radiation chemistry, Radiobiological chemistry, Environmental radiochemistry, Production and control of radioisotopes and labelled compounds, Nuclear power plant chemistry, Nuclear fuel chemistry, Radioanalytical chemistry, Radiation detection and measurement, Nuclear instrumentation and automation, etc.