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首页> 外文期刊>Chemosphere >Biodegradable chelate enhances the phytoextraction of copper by Oenothera picensis grown in copper-contaminated acid soils
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Biodegradable chelate enhances the phytoextraction of copper by Oenothera picensis grown in copper-contaminated acid soils

机译：可生物降解的螯合物可增强铜污染的酸性土壤中生长的月见草对铜的植物提取作用

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摘要

Oenothera picensis plants (Fragrant Evening Primrose) grow in the acid soils contaminated by copper smelting in the coastal region of central Chile. We evaluated the effects of the biodegradable chelate MGDA (methylglycinediacetic acid) on copper extraction by 0. picensis and on leaching of copper through the soil profile, using an ex situ experiment with soil columns of varying heights. MGDA was applied in four rates: 0 (control), 2, 6 and 10 mmol plant"1. MGDA application significantly increased biomass pro duction and foliar concentration, permitting an effective increase in copper extraction, from 0.09 mg plant'1 in the control, to 1.3 mg plant-1 in the 6 and 10 mmol plant-1 treatments. With 10 mmol plant-1 rate of MGDA, the copper concentration in the leachate from the 30 cm columns was 20 times higher than in the control. For the 60 cm columns, copper concentration was 2 times higher than the control. It can be concluded that at increased soil depths, copper leaching would be minimal and that MGDA applications at the studied rates would not pose a high risk for leaching into groundwater. It can thus be stated that applications of MGDA are an effective and environmentally safe way to improve copper extraction by 0. picensis in these soils.
机译：智利中部沿海地区的月见草（月见草）植物生长在被铜冶炼污染的酸性土壤中。我们使用异地试验在不同高度的土壤柱上，评估了可生物降解的螯合剂MGDA（甲基甘氨酸二乙酸）对0. picensis提取铜和通过土壤剖面浸出铜的影响。 MGDA的施用量为四种：0（对照），2、6和10 mmol植物“1。MGDA的施用显着提高了生物量的产生和叶面浓度，从而使铜的提取量从对照中的0.09 mg plant'1有效增加。分别在6和10 mmol plant-1处理中，将其提取为1.3 mg plant-1。以MGDA为10 mmol plant-1的处理率，来自30 cm色谱柱的渗滤液中的铜浓度比对照高20倍。 60厘米色谱柱，铜浓度比对照高2倍，可以得出结论，在土壤深度增加的情况下，铜的浸出将是最小的，并且以研究的比例施用MGDA不会对浸入地下水构成高风险。因此，可以说，MGDA的应用是一种改善这些土壤中0. picensis铜提取的有效且对环境安全的方法。

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  • 来源
    《Chemosphere》 |2011年第4期|p.490-496|共7页
  • 作者

    Isabel Gonzalez; Amparo Cortes; Alexander Neaman; Patricio Rubio;

  • 作者单位

    Doctomdo en Geografia, Planificacion Territorial y Cestion Ambiental, Universitat de Barcelona, Espana, Spain,Centra de Innovation Hortofruticola para el Desarrollo Regional de Valparaiso, Chile;

    Doctomdo en Geografia, Planificacion Territorial y Cestion Ambiental, Universitat de Barcelona, Espana, Spain;

    Area de Medioambiente, Facultad de Agronomic, Pontificia Universidad Catolica de Valparaiso, Chile,Centra Regional de Estudios en Alimentos Saludables, Region de Valparaiso, Chile;

    Doctomdo en Geografia, Planificacion Territorial y Cestion Ambiental, Universitat de Barcelona, Espana, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    phytoremediation; induced phytoextraction; chelation; metal bioavailability; methylglycinediacetic acid; bioaccumulation;

    机译：植物修复;诱导植物提取螯合金属生物利用度;甲基甘氨酸二乙酸;生物蓄积;

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