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首页> 外文期刊>The Science of the Total Environment >Health risk apportionment of arsenic from multiple exposure pathways in Paracatu, a gold mining town in Brazil
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Health risk apportionment of arsenic from multiple exposure pathways in Paracatu, a gold mining town in Brazil

机译：来自巴西金矿镇帕拉科特的多次曝光途径的健康风险分配砷

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摘要

This study assessed various exposure pathways of arsenic and their health risk apportionment to the residents of Paracatu, a gold mining town in Brazil. We measured arsenic concentrations in 50 groundwater and surface town water samples from nearby residences, 38 surface soil dust from residential/commercial dwellings and roadside of Paracatu, and 600 airborne dust samples including PM10 and total suspended particulates (TSP), in additional to a previous reported food survey containing 90 samples from 15 major food categories. For the surface soil dust, bioaccessibility of arsenic as a surrogate of bioavailability was determined using an in vitro physiologically based extraction test (PBET). Rice and bean were found to contain the highest levels of arsenic in which the arsenic speciation was measured whereas the percentages of inorganic arsenic of other food items were taken from the literature for the risk apportionment calculation. The results show that the contribution of inhaled arsenic is = 3% of the total daily intake, even assuming 100% BAC. The average bioaccessibility of arsenic in the surface soil dust was 3.4 +/- 2.0% (n = 17) with a bioaccessible concentration of 4.1 +/- 3.7 mg/kg. Food was the main contributor of the daily total intake of arsenic with rice and beans being the most significant ones. The total arsenic intake (ingestion + inhalation) is about 10% of the JECFA BMDL0.5 of 3 mu g/kg b.w. per day, and the combined risk based on the cancer slope calculation is similar to the arsenic intake from the consumption of 2 L of water containing 10 mu g/L of arsenic, a maximum concentration recommended by WHO. The holistic approach by addressing multiple pathways of exposure is considered a useful tool for health risk assessment throughout the life of mine including mine closure, and can be applied at legacy sites. Crown Copyright (C) 2019 Published by Elsevier B.V. All rights reserved.
机译：本研究评估了砷的各种曝光途径及其健康风险分配给巴西的金矿镇帕拉卡茨居民。从附近的住宅，38个表面土壤粉尘中，从附近的住宅/商业住宅和帕拉卡特路边的路边测量了50个地下水和地表镇水样中的砷浓度，以及600个空中粉尘样品，包括PM10和总悬浮的颗粒（TSP），以前报告的食物调查含有来自15个主要食品类别的90个样本。对于表面土粉尘，使用体外生理学的提取试验（PBET）测定作为生物利用度替代品的砷的生物可接受性。发现米和豆类含有最高水平的砷，其中测量了砷形态，而其他食物的无机砷的百分比取自文献，以进行风险分配计算。结果表明，即使假设100％BAC，吸入砷的贡献率为<= 3％。表面土壤粉尘中砷的平均生物可接为性为3.4 +/- 2.0％（n = 17），生物可接为浓度为4.1 +/- 3.7mg / kg。食物是每日总摄入砷与米饭和豆类是最重要的主要贡献者。总砷进气（摄入+吸入）约为3μg/ kg B.W的JECFA BMDL0.5的10％。每天，基于癌症斜率计算的合并风险类似于砷的砷摄入量与含有10μg砷的2L水的砷，最大浓度推荐。通过解决多种接触路径的整体方法被认为是整个矿井封闭过程中的健康风险评估的有用工具，并且可以应用于遗留点。皇家版权（c）2019由elestvier b.v出版。保留所有权利。

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  • 来源
    《The Science of the Total Environment》 |2019年第jul10期|36-43|共8页
  • 作者

    Ng Jack C.; Ciminelli Virginia; Gasparon Massimo; Caldeira Claudia;

  • 作者单位

    Univ Queensland QAEHS PACE Bldg 20 Cornwall St Brisbane Qld 4102 Australia|INCT Acqua Natl Inst Sci & Technol Minerals Resources Water Belo Horizonte MG Brazil;

    Univ Fed Minas Gerais Dept Met & Mat Engn Belo Horizonte MG Brazil|INCT Acqua Natl Inst Sci & Technol Minerals Resources Water Belo Horizonte MG Brazil;

    INCT Acqua Natl Inst Sci & Technol Minerals Resources Water Belo Horizonte MG Brazil|Univ Queensland Sch Earth & Environm Sci Brisbane Qld 4072 Australia|EIT RawMat GmbH D-10789 Berlin Germany;

    Univ Fed Minas Gerais Dept Met & Mat Engn Belo Horizonte MG Brazil|INCT Acqua Natl Inst Sci & Technol Minerals Resources Water Belo Horizonte MG Brazil;

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  • 正文语种 eng
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  • 关键词

    Risk assessment; Bioaccessibility; Arsenic speciation; Arsenic monitoring; Air-particulate arsenic;

    机译：风险评估;生物可接受;砷形式;砷监测;空气 - 颗粒砷;

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