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首页> 外文期刊>Environmental Science & Technology >Using the SBRC Assay to Predict Lead Relative Bioavailability in Urban Soils: Contaminant Source and Correlation Model
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Using the SBRC Assay to Predict Lead Relative Bioavailability in Urban Soils: Contaminant Source and Correlation Model

机译：使用SBRC分析法预测城市土壤中铅的相对生物利用度：污染物源和相关模型

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摘要

Using in vitro bioaccessibility assays to predict Pb relative bioavailability (RBA) in contaminated soils has been demonstrated, however, limited research was performed on urban soils having lower Pb levels. In this study, 162 soils from urban parks in 27 capital cities in China were measured for Pb bioaccessibility using the SBRC assay, with Pb-RBA in 38 subsamples being measured using a mouse-kidney assay. Total Pb concentrations in soils were 9.3-1198 mg kg~(-1), with 92% of the soils having Pb concentrations ＜100 mg kg~(-1). Lead bioaccessibility in soils was 20-94%, increasing with Pb concentration up to 100 mg kg~(-1) (r = 0.44), however, limited variability in Pb bioaccessibility (60-80%) was observed for soils with Pb ＞ 100 mg kg~(-1). On the basis of a stable isotope fingerprinting technique, coal combustion ash was identified as the major Pb source, contributing to the increased Pb bioaccessibility with increasing soil Pb concentration. Lead-RBA in soils was 17-87%, showing a strong linear correlation with Pb bioaccessibility (r~2 = 0.61), with cross validation of the correlation based on random subsampling and leave-one-out approaches yielding low prediction errors. On the basis of the large sample size of 38 soils, this study demonstrated that the Pb-RBA predictive capability of the SBRC assay can be extended from mining/smelting impacted soils to urban soils with lower Pb levels.
机译：已经证明了使用体外生物可及性测定法来预测污染土壤中铅的相对生物利用度（RBA），但是，对铅含量较低的城市土壤进行了有限的研究。在这项研究中，使用SBRC测定法测量了中国27个首都城市市区公园的162种土壤中Pb的生物可及性，并使用小鼠肾脏测定法测量了38个子样品中的Pb-RBA。土壤中的总铅浓度为9.3-1198 mg kg〜（-1），其中92％的土壤中铅浓度＜100 mg kg〜（-1）。铅在土壤中的生物利用率为20-94％，随Pb浓度达到100 mg kg〜（-1）时增加（r = 0.44），然而，Pb＞土壤中铅的生物利用率变化有限（60-80％）。 100毫克kg〜（-1）。在稳定的同位素指纹技术的基础上，煤燃烧的灰烬被确定为主要的Pb来源，其随着土壤Pb浓度的增加而增加了Pb的生物可及性。土壤中的铅-RBA为17-87％，与铅的生物可利用性呈极强的线性相关性（r〜2 = 0.61），并且基于随机次采样和留一法的交叉验证相关性得到了较低的预测误差。基于38个土壤的大量样本，这项研究表明SBRC分析的Pb-RBA预测能力可以从采矿/冶炼受影响的土壤扩展到Pb含量较低的城市土壤。

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  • 来源
    《Environmental Science & Technology》 |2016年第10期|4989-4996|共8页
  • 作者

    Hong-Bo Li; Di Zhao; Jie Li; Shi-Wei Li; Ning Wang; Albert L. Juhasz; Yong-Guan Zhu; Lena Q. Ma;

  • 作者单位

    State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, People's Republic of China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, People's Republic of China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, People's Republic of China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, People's Republic of China;

    Institute of Agricultural Resources and Environments, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, People's Republic of China;

    Future Industries Institute, University of South Australia, Mawson Lakes, South Australia 5095, Australia;

    Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, People's Republic of China;

    State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210046, People's Republic of China,Soil and Water Science Department, University of Florida, Gainesville, Florida 32611, United States;

  • 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);
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