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首页> 外文期刊>Journal of Hazardous Materials >Diffusion experiments for estimating radiocesium and radiostrontium sorption in unsaturated soils from Spain: Comparison with batch sorption data
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Diffusion experiments for estimating radiocesium and radiostrontium sorption in unsaturated soils from Spain: Comparison with batch sorption data

机译:估算西班牙非饱和土壤中放射性铯和放射性锶吸附的扩散实验:与批吸附数据的比较

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摘要

As sorption data obtained from batch tests are often used to estimate pollutant transport in unsaturated soils, comparison between sorption data obtained in the two conditions is required to ensure a correct risk assessment. With this aim, radiostrontium and radiocesium apparent diffusion coefficients (D_d) were quantified in nine unsaturated soils, and the derived distribution coefficients (K_d) were compared with K_d data from batch experiments.rnThe D_a(Sr) and the D_a(Cs) ranged from 1.8 × 10~(-11) to 1.5 × 10~(-10) m~2 s~(-1), and from 1.0 × 10~(-13) to 5.9 × 10~(-11) m~2 s~(-1). respectively. The D_a (Sr) varied according to both soil packing parameters and properties governing Sr interaction. For Cs, the soil sorption properties explained the variation on D_a(Cs). The K_d values derived from D_a (from 0.014 to 1.8 L kg~(-1) for Sr; from 0.55 to 942 L kg~(-1) for Cs) were lower than from batch tests (from 1 to 97 L kg~(-1) for Sr; from 10 to 14,600 L kg~(-1) for Cs), thus indicating that batch data may not accurately describe radionuclide transport in unsaturated soils. However, the two sets of data correlated well, thus suggesting that radionuclide transport can be estimated from batch tests, which are faster than diffusion experiments.
机译:由于通常使用分批测试获得的吸附数据来估算非饱和土壤中的污染物迁移,因此需要对在两种条件下获得的吸附数据进行比较,以确保正确的风险评估。为此目的,对9种非饱和土壤中的放射性锶和放射性铯表观扩散系数(D_d)进行了定量,并将得出的分布系数(K_d)与批次实验中的K_d数据进行了比较。 1.8×10〜(-11)到1.5×10〜(-10)m〜2 s〜(-1),从1.0×10〜(-13)到5.9×10〜(-11)m〜2 s 〜(-1)。分别。 D_a(Sr)根据土壤填充参数和控制Sr相互作用的特性而变化。对于Cs,土壤吸附特性解释了D_a(Cs)的变化。从D_a得出的K_d值(对于Sr为0.014至1.8 L kg〜(-1);对于Cs为0.55至942 L kg〜(-1))低于分批测试(从1至97 L kg〜(-1))。 -1)对于Sr; 10至14,600 L kg〜(-1对于Cs),因此表明批次数据可能无法准确描述放射性核素在非饱和土壤中的迁移。但是,两组数据之间的相关性很好,因此表明可以通过批处理测试估算放射性核素的转运,这比扩散实验要快。

著录项

  • 来源
    《Journal of Hazardous Materials》 |2010年第3期|P.1072-1079|共8页
  • 作者单位

    Department de Quimica Analitica, Universitat de Barcelona, Marti i Franques 1-11,08028 Barcelona, Spain;

    rnDepartment de Quimica Analitica, Universitat de Barcelona, Marti i Franques 1-11,08028 Barcelona, Spain;

    rnDepartment de Quimica Analitica, Universitat de Barcelona, Marti i Franques 1-11,08028 Barcelona, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    radionuclide; soil; pollutant transport; apparent diffusion coefficient; distribution coefficient;

    机译:放射性核素泥;污染物运输;表观扩散系数分配系数;

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