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首页> 外文期刊>Environmental Pollution >Sulfur-aided phytoextraction of Cd and Zn by Salix smithiana combined with in situ metal immobilization by gravel sludge and red mud
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Sulfur-aided phytoextraction of Cd and Zn by Salix smithiana combined with in situ metal immobilization by gravel sludge and red mud

机译：史密斯柳（Salix smithiana）硫辅助萃取镉和锌以及碎石污泥和赤泥原位固定化金属

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摘要

As phytoextraction implementation may be limited by metal toxicity and leaching, we investigated the idea of in situ metal immobilization in bulk soil, while increasing metal bioavailability in the rhizosphere. Salix smithiana was grown in a pot experiment on two Cd/Zn polluted soils. Treatments with or without willows included: no additives; gravel sludge + red mud kg~(-1); acidification with S to pH 3.5; and metal immobilization combined with soil acidification. Salix smithiana removed up to 0.78 ± 0.06% total Cd and 0.34% (±0.02) total Zn from the non-treated soils. The phytoextraction efficiency in the S treatments was enhanced by up to ～50% in response to metal solubility that was magnified by reductive co-dissolution from Mn (IV) and Fe(III) (oxy)hydroxides during microbial S oxidation in the willow rhizosphere. The proposed technique proved to enhance phytoextraction efficiency while controlling the risk of metal leaching from the root zone and phytotoxicity.
机译：由于植物提取的实施可能受到金属毒性和浸出的限制，因此我们研究了将金属原位固定在散装土壤中的想法，同时增加了根际中金属的生物利用度。在一个盆栽试验中，在两种镉/锌污染的土壤上种植了柳树。包括或不包括柳树的处理包括：无添加剂；碎石污泥+赤泥kg〜（-1）;用S酸化至pH 3.5；和金属固定化结合土壤酸化。史密斯柳从未经处理的土壤中去除了高达0.78±0.06％的总Cd和0.34％（±0.02）的锌。在柳树根际微生物S氧化过程中，由于Mn（IV）和Fe（III）（羟基）氢氧化物的还原共溶解，金属溶解度使S处理的植物提取效率提高了约50％。 。所提出的技术证明可以提高植物提取效率，同时控制从根部浸出金属的风险和植物毒性。

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  • 来源
    《Environmental Pollution》 |2012年第11期|p.222-231|共10页
  • 作者

    Muhammad Iqbal; Markus Puschenreiter; Eva Oburger; Jakob Santner; Walter W. Wenzel;

  • 作者单位

    BOKU - University of Natural Resources and Life Sciences Vienna, Department of Forest and Soil Sciences, Konrad Lorenz StraJSe 24, A-3430 Tulln, Austria;

    BOKU - University of Natural Resources and Life Sciences Vienna, Department of Forest and Soil Sciences, Konrad Lorenz StraJSe 24, A-3430 Tulln, Austria;

    BOKU - University of Natural Resources and Life Sciences Vienna, Department of Forest and Soil Sciences, Konrad Lorenz StraJSe 24, A-3430 Tulln, Austria;

    BOKU - University of Natural Resources and Life Sciences Vienna, Department of Forest and Soil Sciences, Konrad Lorenz StraJSe 24, A-3430 Tulln, Austria;

    BOKU - University of Natural Resources and Life Sciences Vienna, Department of Forest and Soil Sciences, Konrad Lorenz StraJSe 24, A-3430 Tulln, Austria;

  • 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
  • 中图分类
  • 关键词

    phytoextraction; rhizosphere; sulfur; manganese; salix smithiana;

    机译：植物提取根际硫;锰;史密斯柳;

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