Biosphere Impact Studies, SCK•CEN, Belgian Nuclear Research Centre, Boeretang 200, B-2400 Mol, Belgium; Division of Soil and Water Management, Katholieke Universiteit Leuven, Kasteelpark Arenberg 20, B-3001 Leuven, Belgium.
Division of Soil and Water Management, Katholieke Universiteit Leuven, Kasteelpark Arenberg 20, B-3001 Leuven, Belgium.
Sci Total Environ. 2015 Aug 15;524-525:148-56. doi: 10.1016/j.scitotenv.2015.04.028. Epub 2015 Apr 16.
The high variability of the soil-to-plant transfer factor of radiocaesium (RCs) compels a detailed analysis of the radiocaesium interception potential (RIP) of soil, which is one of the specific factors ruling the RCs transfer. The range of the RIP values for agricultural soils in the Fukushima accident affected area has not yet been fully surveyed. Here, the RIP and other major soil chemical properties were characterised for 51 representative topsoils collected in the vicinity of the Fukushima contaminated area. The RIP ranged a factor of 50 among the soils and RIP values were lower for Andosols compared to other soils, suggesting a role of soil mineralogy. Correlation analysis revealed that the RIP was most strongly and negatively correlated to soil organic matter content and oxalate extractable aluminium. The RIP correlated weakly but positively to soil clay content. The slope of the correlation between RIP and clay content showed that the RIP per unit clay was only 4.8 mmol g(-1) clay, about threefold lower than that for clays of European soils, suggesting more amorphous minerals and less micaceous minerals in the clay fraction of Japanese soils. The negative correlation between RIP and soil organic matter may indicate that organic matter can mask highly selective sorption sites to RCs. Multiple regression analysis with soil organic matter and cation exchange capacity explained the soil RIP (R(2)=0.64), allowing us to map soil RIP based on existing soil map information.
土壤-植物放射性铯转移因子的高度变异性迫使对土壤放射性铯截获潜力（RIP）进行详细分析，这是控制放射性铯转移的特定因素之一。福岛事故受影响地区农业土壤的 RIP 值范围尚未得到全面调查。在这里，对福岛污染区附近采集的 51 个代表性表土进行了 RIP 和其他主要土壤化学性质的特征描述。土壤的 RIP 相差 50 倍，与其他土壤相比，安山土的 RIP 值较低，表明土壤矿物学起作用。相关分析表明，RIP 与土壤有机质含量和草酸盐可提取铝呈最强负相关。RIP 与土壤粘粒含量呈弱正相关。RIP 与粘粒含量之间的相关斜率表明，每单位粘粒的 RIP 仅为 4.8mmol g(-1)粘粒，比欧洲土壤粘粒低约三倍，表明日本土壤粘粒部分中的无定形矿物较多，云母状矿物较少。RIP 与土壤有机质之间的负相关可能表明有机质可以掩盖对 RCs 具有高选择性的吸附位点。用土壤有机质和阳离子交换量进行的多元回归分析解释了土壤 RIP（R(2)=0.64），允许我们根据现有的土壤图信息绘制土壤 RIP 图。
