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首页> 外文期刊>Journal of environmental sciences >Rapid evaluation of arsenic contamination in paddy soils using field portable X-ray fluorescence spectrometry
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Rapid evaluation of arsenic contamination in paddy soils using field portable X-ray fluorescence spectrometry

机译：使用田间便携式X射线荧光光谱法快速评估水稻土中的砷污染

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摘要

Arsenic (As) in paddy fields is deteriorating food security and human health through rice ingestion. Rice is the dominant food source of arsenic exposure to half of the world's population. Therefore, an in situ effective method for As risk evaluation in paddy soil is strongly needed to avoid As exposure through rice ingestion. Herein, we developed a rapid analytical methodology for determination of As in plant tissues using field portable X-ray fluorescence spectrometry (FP-XRF). This method was applied to rice roots in order to evaluate the As contamination in paddy soils. The results showed that rice roots with iron plaques were superior to rhizosphere soils for generating FP-XRF signals, especially for field sites with As concentrations lower than the soil detection limit of FP-XRF (30.0 mg/kg). Moreover, the strong linear relationships of As concentrations between the rice roots and corresponding leaves and grains proved that the rice root, rather than the soil, is a better predictor of As concentrations in rice grains. The research provides an efficient As monitoring method for As contaminated paddy fields by using wetland plant roots with iron plaques and XRF-based analytical techniques. (c) 2017 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.
机译：稻田的砷（AS）正在通过水稻摄入恶化食物安全和人类健康。米饭是砷的主要食物来源，暴露于世界上一半的人口。因此，强烈需要在水稻土中造成风险评估的原位有效方法，以避免通过稻米摄取暴露。在此，我们开发了一种快速分析方法，用于使用现场便携式X射线荧光光谱法（FP-XRF）测定植物组织中。将该方法应用于稻根，以评估水稻土中的污染。结果表明，用铁斑块的水稻根优于根际土壤，用于产生FP-XRF信号，特别是对于常量低于FP-XRF（30.0mg / kg）的土壤检测极限的常见场地。此外，随着稻块和相应叶片和颗粒之间的浓度的强烈线性关系证明了稻粒，而不是土壤，是作为稻米浓度的更好的预测因子。该研究通过使用湿地植物根源用铁斑块和基于XRF的分析技术提供了一种有效的污染稻田的监测方法。 （c）2017中国科学院生态环境科学研究中心。 elsevier b.v出版。

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