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首页> 外文期刊>Journal of soil & sediments >Influence of alkaline silicon-based amendment and incorporated with biochar on the growth and heavy metal translocation and accumulation of vetiver grass (Vetiveria zizanioides) grown in multi-metal-contaminated soils
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Influence of alkaline silicon-based amendment and incorporated with biochar on the growth and heavy metal translocation and accumulation of vetiver grass (Vetiveria zizanioides) grown in multi-metal-contaminated soils

机译：碱性硅基改性剂和生物炭的掺入对多金属污染土壤中香根草（Vetiveria zizanioides）的生长以及重金属易位和积累的影响

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摘要

Purpose This study investigated the effects of alkaline silicon-based amendment (A) and incorporated with biochar (B) on the growth, heavy metal translocation, and accumulation of vetiver grass (Vetiveria zizanioides) grown in multi-metal-contaminated soils.Materials and methods Soil incubation for 6months and pot experiments for 6months were performed to investigate the growth and the translocation factor (TF) and bioaccumulation factor (BCF) values of heavy metals in vetiver grown in As-, Cd-, Cr-, and Pb-contaminated soils amended with A (0.5%) and AB (0.5% A; 1.5% B).Results and discussion The vetiver could grow in multi-metal-contaminated soils due to the restriction of metals translocation in vetiver. Vetiver could be the plant for phytostabilization of As, Cr, Cd, and Pb because As, Cr, Cd, and Pb accumulated by the vetiver were largely retained in the roots, as the TF values for As, Cr, Cd, and Pb were 1; the BCF values for As, Cr, Cd, and Pb were obviously greater in roots than shoots. Application of A and AB markedly improved vetiver growth due to A- and AB-induced accumulation of Cd, Pb, and Cr in the roots, and then enhanced phytostabilization of Cd, Pb, and Cr in roots based on the BCF values, and the immobilization of Cd and Pb in soils based on increase of soil pH and Si-induced accumulation of Cd, Pb, and Cr in the roots.Conclusions Vetiver represents a candidate for revegetation of multi-metal-contaminated soils amended by A or AB. Further investigations are required to determine the feasibility of revegetation in multi-metal-contaminated soils at the field scale.
机译：目的本研究调查了碱性硅基改良剂（A）并与生物炭（B）结合使用对多金属污染土壤中香根草（Vetiveria zizanioides）的生长，重金属易位和积累的影响。方法进行土壤培养6个月和盆栽实验6个月，以研究被As，Cd，Cr和Pb污染的香根草的生长以及重金属的迁移因子（TF）和生物累积因子（BCF）值。结果：香根草可以在多金属污染的土壤中生长，这是由于香根草中金属易位的限制。香根草可以在多金属污染的土壤中生长。香根草可能是As，Cr，Cd和Pb的植物稳定化植物，因为香根草积累的As，Cr，Cd和Pb大部分保留在根中，因为As，Cr，Cd和Pb的TF值为<1;根中As，Cr，Cd和Pb的BCF值明显高于枝条。 A和AB的施用显着改善了香根草的生长，这是因为A和AB诱导了根中Cd，Pb和Cr的积累，然后基于BCF值增强了Cd，Pb和Cr在根中的植物稳定性。根据土壤pH值的增加和硅诱导的根中Cd，Pb和Cr的积累，土壤中Cd和Pb的固定化。结论香根草代表被A或AB改良的多金属污染土壤的植被恢复的候选人。需要进一步的研究以确定在野外尺度上多金属污染土壤中进行植被恢复的可行性。

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  • 来源
    《Journal of soil & sediments》 |2019年第5期|2277-2289|共13页
  • 作者

    Mu Jing; Hu Zhengyi; Huang Lijuan; Tang Sichen; Holm Peter E.;

  • 作者单位

    Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China|Univ Copenhagen, Dept Plant & Environm Sci, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark|Sino Danish Ctr Educ & Res SDC, Beijing 100190, Peoples R China;

    Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China|Sino Danish Ctr Educ & Res SDC, Beijing 100190, Peoples R China|Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China;

    Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China|Univ Copenhagen, Dept Plant & Environm Sci, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark|Sino Danish Ctr Educ & Res SDC, Beijing 100190, Peoples R China;

    Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 101408, Peoples R China;

    Univ Copenhagen, Dept Plant & Environm Sci, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Denmark|Sino Danish Ctr Educ & Res SDC, Beijing 100190, Peoples R China;

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  • 关键词

    Alkaline silicon-based amendment; Biochar; Multi-metal-contaminated soils; Revegetation; Vetiver grass;

    机译：碱性硅基改良剂;生物炭;多金属污染土壤;植被;香根草;

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