R. Jiménez-Ballesta, F. García-Navarro, J. Amorós, C. Pérez-de-los-Reyes, S. Bravo
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引用次数: 0
摘要
拉曼查地区是西班牙中部的主要粮食产区，有大片地区被用作葡萄园。本文介绍了该地区两种具有代表性的土壤剖面(Alfisols)中稀土元素的含量及其分布。碳酸盐岩的存在和半干旱气候是其主要的特征环境因素。用x射线荧光光谱(XRF)测定了镧(La)、铈(Ce)、钕(Nd)、钪(Sc)和钇(Y)的浓度。结果表明，稀土元素的最大含量(mg·kg-1)为Ce 93.3、La 46.8、Nd 38.6、Y 25.5和Sc 13.0。两种土壤剖面中稀土元素含量的变化顺序为:Ce > La > Nd > Y > Sc。在葡萄园中施用杀菌剂和施肥可以使土壤中稀土元素含量达到该地区的正常背景水平。根据地积指数(Igeo)，土壤样品未受稀土污染或轻度污染。
Unravelling the Concentrations of Five Rare Earth Elements in Two Vineyard Red Soils
The La Mancha region is a primary food production area in central Spain, with extensive zones used as vineyards. This article aims to present information about rare earth elements’ (REEs) contents and deals with their distribution in two representative soil profiles (Alfisols) in this area. The presence of carbonates and a semiarid climate are its main characteristic environmental factors. Lanthanum (La), Cerium (Ce), Neodymium (Nd), Scandium (Sc) and Yttrium (Y) concentrations were determined using X-ray fluorescence spectroscopy (XRF). The results revealed the following maximum REEs’ contents (mg·kg–1): Ce 93.3, La 46.8, Nd 38.6, Y 25.5 and Sc 13.0. The REEs’ concentrations in the two soil profiles were in the following order: Ce > La > Nd > Y > Sc. The application of fungicides and the addition of fertilisers in vineyards can increase the soil concentration of rare earths up to this region’s normal background levels. According to the Geo-Accumulation Index (Igeo), soil samples were non-contaminated or slightly contaminated by REEs.
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