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首页> 外文期刊>Science of the total environment >Incorporating bioaccessibility into human health risk assessments of heavy metals in urban park soils
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Incorporating bioaccessibility into human health risk assessments of heavy metals in urban park soils

机译：将生物可及性纳入城市公园土壤中重金属的人类健康风险评估

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摘要

Contaminants in urban soils can directly pose significant human health risks through oral ingestion, particle inhalation, and dermal contact, especially for children in public parks. Both non-carcinogenic and carcinogenic risks of heavy metals (Cd, Co, Cr, Cu, Mn, Ni, Pb, and Zn) were characterized in 40 surface soils (exposed lawns) from 14 urban parks in Xiamen, China. Results based on total metal concentrations may overestimate the actual risks in comparison with oral bioaccessibility assessment that were estimated by a simplified physiologically based extraction test (SBET). After considering the soil-specific bioaccessibility (Cd>Cu>Pb>Mn>Zn>Co~-Ni>Cr), the non-cancer hazard of Pb to children via oral ingestion should be a consideration though its Hazard Index (HI) was below one. The overall cancer risks to adults still exceeded the target value 10~(-6), mainly contributed by Cr (93.8%) and Pb (6.19%) via dermal contact (683%) and oral ingestion (30.4%). To produce a more realistic estimation for human health risks of metal contamination in urban soils, a framework combining land use type and bioaccessibility is recommended and thereby should be applied for the derivation of risk-based, site-specific soil guidelines.
机译：城市土壤中的污染物会通过口服，颗粒吸入和皮肤接触直接对人类健康构成重大风险，尤其是对于公园里的儿童而言。在厦门市14个城市公园的40种表层土壤（裸露的草坪）中，对重金属（镉，钴，铬，铜，锰，镍，铅和锌）的非致癌和致癌风险进行了表征。与通过简化的基于生理的提取试验（SBET）进行的口服生物可及性评估相比，基于总金属浓度的结果可能会高估实际风险。在考虑了土壤特异性生物可及性（Cd> Cu> Pb> Mn> Zn> Co〜-Ni> Cr）后，尽管铅的危害指数为HI，但仍应考虑其通过口服对儿童的非癌性危害。以下之一。成人的总体癌症风险仍超过目标值10〜（-6），主要是通过皮肤接触（683％）和口服摄入（30.4％）引起的Cr（93.8％）和Pb（6.19％）。为了对城市土壤中金属污染的人类健康风险做出更现实的估计，建议将土地使用类型和生物可及性相结合的框架，并应将其应用于基于风险的，针对特定地点的土壤指南。

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  • 来源
    《Science of the total environment》 |2012年第1期|p.88-96|共9页
  • 作者

    Xiao-San Luo; Jing Ding; Bo Xu; Yi-Jie Wang; Hong-Bo Li; Shen Yu;

  • 作者单位

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

    Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China,Graduate University of Chinese Academy of Sciences, Beijing 100049, China;

    Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China,Graduate University of Chinese Academy of Sciences, Beijing 100049, China;

    Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China,Graduate University of Chinese Academy of Sciences, Beijing 100049, China;

    Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China,Graduate University of Chinese Academy of Sciences, Beijing 100049, China;

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

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    metal contamination; human health risk assessments; oral bioaccessibility; exposure pathways; land use type; urban park soil;

    机译：金属污染;人类健康风险评估;口腔生物可及性;接触途径;土地利用类型;城市公园土壤;

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