National Institute of Radiological Sciences, National Institutes for Quantum Sciences and Technology (QST), 4-9-1 Anagawa, Inage-ku, Chiba 263-8555, Japan.
Department of Radiological Sciences, Tokyo Metropolitan University, 7-2-10 Higashiogu, Arakawa-ku, Tokyo 116-8551, Japan.
Molecules. 2021 Dec 11;26(24):7510. doi: 10.3390/molecules26247510.
Inductively coupled plasma mass spectrometry (ICP-MS) has been used to measure the concentration of trace and rare earth elements (REEs) in soils. Geochemical certified reference materials such as JLk-1, JB-1, and JB-3 were used for the validation of the analytical method. The measured values were in good agreement with the certified values for all the elements and were within 10% analytical error. Beach placer deposits of soils mainly from Odisha, on the east coast of India, have been selected to study selected trace and rare earth elements (REEs), to estimate enrichment factor (EF) and geoaccumulation index (I) in the natural environment. Enrichment factor (EF) and geoaccumulation index (I) results showed that Cr, Mn, Fe, Co, Zn, Y, Zr, Cd and U were significantly enriched, and Th was extremely enriched. The total content of REEs (ƩREEs) ranged from 101.3 to 12,911.3 µg g, with an average 2431.1 µg g which was higher than the average crustal value of ΣREEs. A high concentration of Th and light REEs were strongly correlated, which confirmed soil enrichment with monazite minerals. High ratios of light REEs (LREEs)/heavy REEs (HREEs) with a strong negative Eu anomaly revealed a felsic origin. The comparison of the chondrite normalized REE patterns of soil with hinterland rocks such as granite, charnockite, khondalite and migmatite suggested that enhancement of trace and REEs are of natural origin.
电感耦合等离子体质谱法 (ICP-MS) 已被用于测量土壤中痕量和稀土元素 (REEs) 的浓度。使用 JLk-1、JB-1 和 JB-3 等地球化学标准参考物质对分析方法进行了验证。所有元素的测量值与证书值吻合良好，误差在 10%分析误差以内。选择来自印度东海岸奥里萨邦的海滩砂矿床土壤，以研究选定的痕量和稀土元素 (REEs)，并估算自然环境中的富集因子 (EF) 和地质累积指数 (I)。富集因子 (EF) 和地质累积指数 (I) 的结果表明，Cr、Mn、Fe、Co、Zn、Y、Zr、Cd 和 U 明显富集，而 Th 则极度富集。REEs 的总含量 (ΣREEs) 范围为 101.3 至 12,911.3 µg g，平均值为 2431.1 µg g，高于 ΣREEs 的地壳平均值。Th 和轻REEs 的高浓度呈强相关性，证实了土壤中独居石矿物的富集。轻REEs (LREEs)/重REEs (HREEs) 的高比值和强烈的负 Eu 异常表明其来源于长英质岩石。土壤与内陆岩石（如花岗岩、片麻岩、片岩和混合岩）的球粒陨石归一化 REE 模式的比较表明，痕量和REEs 的增强具有天然成因。
