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Measurement modelling and mapping of arsenic bioaccessibility in Northampton, United Kingdom

机译：英国北安普敦砷生物可及性的测量建模和绘图

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摘要

The human ingestion bioaccessibility of As was measured on 50 representative samples of soils selected from a 281-soil-sample geochemical survey of Northampton. The major and trace element content, pH and near infrared (NIR) spectra of the 281 soils were determined. A multiple linear regression (MLR) model using total As, major element composition and pH identified total As, pH and P to be the significant predictor variables for bioaccessible As (R2 = 0.72, median standard error of prediction =1.5 mg kg~(-1) bioaccessible As). When spectral components (SC) derived from chemometric analysis of the NIR spectra were also included in the MLR, total As, pH, Mg and two NIR spectral components were found to be significant predictor variables (R2 = 0.84, median standard error of prediction = 1.2 mg kg~(-1) bioaccessible As). Correlation analysis of the SC with major element data suggested that the two NIR SC in the second model were related to different forms of Fe oxides in the soil. When plotted over a geological map of Northampton interpolated predictions of bioaccessible As showed clear geological control. The median total As concentration of the soils in Northampton was 30.2 mg kg~(-1) and the median bioaccessible As was 3.0 mg kg~(-1).
机译：在从北安普敦的281个土壤样本地球化学调查中选择的50个代表性土壤样本中测量了人体对砷的摄入生物可及性。测定了281种土壤的主要和微量元素含量，pH和近红外（NIR）光谱。使用总砷，主要元素组成和pH的多元线性回归（MLR）模型确定总砷，pH和P是生物可利用砷的重要预测变量（R2 = 0.72，预测的中位标准误= 1.5 mg kg〜（- 1）生物可及性当从NIR光谱的化学计量分析得出的光谱成分（SC）也包括在MLR中时，总砷，pH，Mg和两个NIR光谱成分被认为是重要的预测变量（R2 = 0.84，预测的中位数标准误= 1.2 mg kg〜（-1）生物可及As）。 SC与主要元素数据的相关分析表明，第二个模型中的两个NIR SC与土壤中不同形式的Fe氧化物有关。当绘制在北安普敦的地质图上时，对生物可及性As的内插预测显示出清晰的地质控制。北安普敦土壤的总砷中位数为30.2 mg kg〜（-1），生物可利用砷中位数为3.0 mg kg〜（-1）。

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  • 来源
    《Journal of Environmental Science and Health》 |2013年第6期|629-640|共12页
  • 作者

    MARK R. CAVE; JOANNA WRAGG; HEATHER HARRISON;

  • 作者单位

    British Geological Survey, Keyworth, Nottingham NG12 5GG, United Kingdom;

    British Geological Survey, Keyworth, Nottingham, United Kingdom;

    British Geological Survey, Keyworth, Nottingham, United Kingdom;

  • 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

    Bioaccessibility; arsenic; soil; near infrared;

    机译：生物可及性;砷;泥;近红外;

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