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首页> 外文期刊>Environmental Science & Technology >Distribution and Speciation of Copper and Arsenic in Rice Plants (Oryza sativa japonica 'Koshihikari') Treated with Copper Oxide Nanoparticles and Arsenic during a Life Cycle
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Distribution and Speciation of Copper and Arsenic in Rice Plants (Oryza sativa japonica 'Koshihikari') Treated with Copper Oxide Nanoparticles and Arsenic during a Life Cycle

机译：生命周期中用氧化铜纳米粒子和砷处理的水稻植株中铜和砷的分布和形态

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摘要

A 6 x 2 factorial study was conducted to investigate the effects of copper oxide nanoparticles (nCuO, 0-100 mg/L), arsenic (As, 0-10 mg/kg), and their interaction on uptake, distribution, and speciation of Cu and As in rice plants (Oryza sativa japonica 'Koshihikari'). Arsenic (in As-addition treatments) and Cu in seedling roots (SRs) were 1.45 and 1.58 times those in soil, respectively. Arsenic and Cu concentrations further increased in mature plant roots (MRs), which were 2.06 and 2.35 times those in soil, respectively. Arsenic and Cu concentrations in seedling shoots (SSs) were 79% and 54% lower than those in SRs, respectively. The mature stems, however, contained only 3% and 44% of As and Cu in SSs. Copper in flag leaves did not vary much compared to that in stems, whereas As was 14.5 times that in stems. Species transformations of Cu and As were observed in rice including reductions of Cu(II) to Cu(I) and As(V) to As(III). Arsenic in dehusked grains was negatively correlated with Cu and was lowered by nCuO below the WHO (World Health Organization) maximum safe concentration for white rice (200 ng/g). This may alleviate As adverse effects on humans from rice consumption.
机译：进行了6 x 2阶乘研究，以研究氧化铜纳米粒子（nCuO，0-100 mg / L），砷（As，0-10 mg / kg）以及它们的相互作用对铜的吸收，分布和形态的影响。水稻中的铜和砷（Oryza sativa japonica'Koshihikari'）。幼苗根中的砷（砷添加处理）和铜分别是土壤中砷的1.45倍和1.58倍。成熟植物根系中的砷和铜浓度进一步增加，分别是土壤中的2.06倍和2.35倍。幼苗芽中的砷和铜的含量分别比SR中的低79％和54％。但是，成熟的茎中SS中仅含有3％和44％的As和Cu。旗叶中的铜与茎中的铜相比变化不大，而砷是茎中的14.5倍。在水稻中观察到了Cu和As的物种转化，包括Cu（II）还原为Cu（I）和As（V）还原为As（III）。去壳谷物中的砷与Cu呈负相关，并被nCuO降低至低于WHO（世界卫生组织）白米的最大安全浓度（200 ng / g）。这可以减轻食用大米对人类的不利影响。

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  • 来源
    《Environmental Science & Technology》 |2019年第9期|4988-4996|共9页
  • 作者

    Liu Jing; Wolfe Kyle; Potter Phillip M.; Cobb George P.;

  • 作者单位

    Baylor Univ, Dept Environm Sci, One Bear Pl 97266, Waco, TX 76798 USA;

    Baylor Univ, Dept Environm Sci, One Bear Pl 97266, Waco, TX 76798 USA;

    ORISE, Oak Ridge, TN 37831 USA;

    Baylor Univ, Dept Environm Sci, One Bear Pl 97266, Waco, TX 76798 USA;

  • 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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  • 正文语种 eng
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