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首页> 外文期刊>Journal of Environmental Science and Health >Role of aquifer media in determining the fate of polycyclic aromatic hydrocarbons in the natural water and sediments along the lower Ganges river basin
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Role of aquifer media in determining the fate of polycyclic aromatic hydrocarbons in the natural water and sediments along the lower Ganges river basin

机译：含水层介质在确定恒河下游流域天然水和沉积物中多环芳烃命运中的作用

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摘要

Groundwater-sourced drinking water quality in South Asia, specifically India, is extremely stressed, mostly from the presence of many pervasive and geogenic pollutants. The presence and behavior of anthropogenic pollutants like polycyclic aromatic hydrocarbons (PAHs) are poorly investigated on a regional or basin-wide scale. The present study provides one of the first documentation of the presence and behavior of PAH in the aquifer sediments in the Ganges river basin. Lower and medium molecular weight PAHs, e.g., naphthalene, phenanthrene, and fluoranthene were detected in 79, 36, and 13% of samples (n = 25). The PAH level in groundwater was approximately five times lower than river water. The sorption behavior of PAHs were studied in experiments in presence/absence of organic carbon and by simulating advective transport of low to medium molecular weight PAHs, e.g., naphthalene, phenanthrene, and fluoranthene in aquifer sediments collected from agricultural, peri-urban, and urban areas. Naphthalene and phenanthrene adsorbed on quartz and kaolinite, but not on clay minerals like kaolinite. Fluoranthene adsorbed more favorably on kaolinite. Numerical modeling of the advective transport of PAHs in aquifers suggest up to 25 times faster movement of pollutants from irrigation-induced pumping, indicating the strong control of hydraulics on the spatial distribution of PAHs in subsurface.
机译：南亚，特别是印度，地下水来源的饮用水质量受到极大压力，这主要是由于存在许多普遍存在的和地质成因的污染物。在区域或流域范围内，对诸如多环芳烃（PAHs）等人为污染物的存在和行为进行的研究很少。本研究提供了恒河流域含水层沉积物中多环芳烃的存在和行为的最早文献之一。在79％，36％和13％的样品中（n = 25）检测到较低和中等分子量的PAH，例如萘，菲和荧蒽。地下水中的PAH水平大约比河水低五倍。在有/无有机碳存在的实验中，通过模拟从农业，城郊和城市收集的含水层沉积物中低至中等分子量的PAH（例如萘，菲和荧蒽）的对流迁移，研究了PAHs的吸附行为。地区。萘和菲吸附在石英和高岭石上，但不吸附在粘土矿物如高岭石上。荧蒽更容易吸附在高岭石上。含水层中PAHs对流输运的数值模型表明，灌溉引起的抽运过程中污染物的运动速度最高可提高25倍，这表明水力对地下PAHs的空间分布有很强的控制力。

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  • 来源
    《Journal of Environmental Science and Health》 |2020年第4期|354-373|共20页
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    Indian Inst Technol Kharagpur Sch Environm Sci & Engn Kharagpur 721302 W Bengal India;

    Indian Inst Technol Kharagpur Sch Environm Sci & Engn Kharagpur 721302 W Bengal India|Indian Inst Technol Kharagpur Dept Geol & Geophys Kharagpur W Bengal India;

    Linkoping Univ TEMA Dept Water & Environm Studies Linkoping Sweden;

    Indian Inst Technol Kharagpur Sch Environm Sci & Engn Kharagpur 721302 W Bengal India|Govt West Bengal Publ Hlth Engn Dept Kolkata India;

    Indian Inst Technol Kharagpur Sch Environm Sci & Engn Kharagpur 721302 W Bengal India|Indian Inst Technol Kharagpur Dept Min Engn Kharagpur W Bengal India;

  • 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
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  • 关键词

    Land use; sediment; groundwater; Ganges river; contamination; transport; extraction; pyrogenic; petrogenic; pumping;

    机译：土地利用;沉淀;地下水;恒河污染;运输;萃取;热解成岩作用抽水;

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