| 介孔硅纳米颗粒对水稻镉吸收的影响 |
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| 引用本文： | 吴迎奔,刘剑波,贺月林,陈薇,许丽娟,王震.介孔硅纳米颗粒对水稻镉吸收的影响[J].中国土壤与肥料,2016(2):145-148. |
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| 作者姓名： | 吴迎奔 刘剑波 贺月林 陈薇 许丽娟 王震 |
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| 作者单位： | 1. 湖南省微生物研究院,湖南 长沙,410009;2. 湖南大学化学生物传感器与计量学国家重点实验室,湖南 长沙,410082 |
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| 摘 要： | 采用盆栽试验研究了介孔硅纳米颗粒(MSN)对水稻Cd吸收的影响。结果表明,MSN提高了土壤溶液的p H值,从而显著降低了土壤Cd的生物有效性,施用量为0.5%、1.0%和2.0%的MSN处理组土壤有效态Cd含量分别下降63.07%、81.30%和93.02%。MSN对Cd污染土壤上水稻生长也有一定的促进作用,显著降低了盆栽水稻籽粒中Cd的含量,0.5%、1.0%和2.0%MSN处理组水稻籽粒中Cd含量从0.363 mg/kg分别下降到0.045 5、0.032 5、0.020 7 mg/kg,均达国家标准。因此,介孔硅纳米颗粒可用于镉污染土壤的修复治理。
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| 关 键 词： | 介孔硅纳米颗粒 水稻 镉污染土壤 |
| 收稿时间： | 2015/1/20 0:00:00 |
| 修稿时间： | 2015/5/16 0:00:00 |
Effect of mesoporous silica nanoparticles on Cd accumulation in rice |
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| Abstract: | The effects of mesoporous silica nanoparticles ( MSN ) on the Cd accumulation in rice were investigated by pot experiments. The results showed that MSN significantly increased the pH of soil solution and inhibited Cd bioavailability. Soil available Cd concentration in soil decreased by 63.07%, 81.30% and 93.02% under the 0.5%, 1. 0% and 2.0% MSN treatments, respectively. MSN significantly reduced the Cd content in rice grain. The Cd content of fresh rice sample de-creased from 0.363 mg/kg to 0. 0455 mg/kg, 0.0325 mg/kg and 0.0207 mg/kg under the 0.5%, 1.0% and 2.0% MSN treatments, respectively. The Cd content in all rice grain met the edible standards. It was concluded that MSN could be used to restore Cd contaminated soil. |
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| Keywords: | mesoporous silica nanoparticles rice cadmium pollation soil |
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