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首页> 外文期刊>Environmental Science & Technology >Emissions of Inorganic and Organic Arsenic Compounds via the Leachate Pathway from Pretreated Municipal Waste Materials: A Landfill Reactor Study
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Emissions of Inorganic and Organic Arsenic Compounds via the Leachate Pathway from Pretreated Municipal Waste Materials: A Landfill Reactor Study

机译：预处理市政废物通过渗滤液途径排放的无机和有机砷化合物：垃圾堆研究

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The emission of arsenic (As) with leachate from mechanically biologically pretreated municipal solid waste (MBP-MSW) was quantified over one year using landfill simulation reactors. Arsenic mobilization and transformation processes were studied by simulating different environmental conditions (anoxic conditions with underlying soil or oxic/anoxic conditions). Amounts of mono-, di-, and trimethylated As in MBP-MSW prior to simulation were <48 μg As kg~(-1) and were magnified to 300-390 μg As kg~(-1) under anoxic conditions, whereas methylated As was undetectable in the oxic setup. The highest leachate concentrations (up to 84 μg L~(-1)) occurred during the first four weeks of manipulation. The annual As_(total) release with leachates averaged 19.6, 7.6, and 4.5 μg kg~(-1) under an anoxic environment with underlying soil, oxic conditions, and anoxic conditions, respectively, with 15-50% occurring as organic As. The annually released As represented 0.2-0.8% of the As_(total) pool, suggesting that As mobilization from waste is a slow process. The anoxia diminished As release rates, whereas anoxic conditions with underlying soil material elevated the As mobilization, probably due to reductive dissolution of soil-derived Fe and Mn (hydr)oxides. The mass balance of methylated As in MBP-MSW and leachates before and afterthe treatments highlights As methylation under anoxic conditions and demethylation under oxic landfill conditions.
机译：使用填埋模拟反应器，对经过机械生物预处理的城市固体废物（MBP-MSW）中的沥出液中砷（As）的排放进行了量化。通过模拟不同的环境条件（含土壤的缺氧条件或有氧/缺氧条件）研究了砷的迁移和转化过程。在模拟之前，MBP-MSW中单甲基，二甲基和三甲基As的含量<48μgAs kg〜（-1），在缺氧条件下放大到300-390μgAs kg〜（-1），而甲基化在有氧环境中无法检测到。在操作的前四个星期，最高渗滤液浓度（高达84μgL〜（-1））出现。在有土壤，有氧条件和无氧条件的缺氧环境下，含浸出物的年As_（总）释放量平均分别为19.6、7.6和4.5μgkg〜（-1），其中有机砷占15-50％。每年释放的As占As_（总量）池的0.2-0.8％，这表明从废物中动员As是一个缓慢的过程。缺氧减少了As的释放速度，而土壤下面的缺氧条件则提高了As的迁移，这可能是由于土壤中的Fe和Mn（氢）氧化物的还原溶解所致。处理前后，MBP-MSW和渗滤液中甲基化砷的质量平衡突出显示了在缺氧条件下为As甲基化和在有氧垃圾填埋条件下为脱甲基。

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  • 来源
    《Environmental Science & Technology》 |2009年第18期|7092-7097|共6页
  • 作者

    J.-H. HUANG; G. ILGEN; D. VOGEL; B. MICHALZIK; S. HANTSCH; L. TENNHARDT; B. BILITEWSKI;

  • 作者单位

    Institute of Biogeochemistry and Pollutant Dynamics, Swiss Federal Institute of Technology Zurich (ETH Zurich) CHN, CH-8092 Zurich, Switzerland;

    Central Analytic, Bayreuth Center for Ecology and Environmental Research (BayCEER), University of Bayreuth, 95440 Bayreuth, Germany;

    Poeyry GKW GmbH, Grunaer Weg 26, 01277 Dresden, Germany Institute of Waste Management and Contaminated Sites Treatment, Technische Universitaet Dresden, Pratzschwitzer Strasse 15, 01796 Pirna, Germany;

    Institute of Geography, Friedrich-Schiller-University Jena, Loebdergraben 32, 07743 Jena, Germany;

    Institute of Waste Management and Contaminated Sites Treatment, Technische Universitaet Dresden, Pratzschwitzer Strasse 15, 01796 Pirna, Germany;

    Berliner Wasserbetriebe, Cicerostrasse 24, 10709 Berlin, Germany;

    Institute of Waste Management and Contaminated Sites Treatment, Technische Universitaet Dresden, Pratzschwitzer Strasse 15, 01796 Pirna, Germany;

  • 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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