| 张福祎1，姚 焱1，张 平2，刘文峰2，耿新华2，黎秀苑2，刘 芳1.常见植物对重金属铊吸收特征研究[J].广东农业科学,2018,45(4):100-105 |
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常见植物对重金属铊吸收特征研究 |
| Study on heavy mental thallium biosorption by common plants |
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| DOI：10.16768/j.issn.1004-874X.2018.04.015 |
| 中文关键词: 铊 铊价态 铊富集 甘蓝 钾 |
| 英文关键词: thallium（Tl） thallium valence state thallium accumulation Brassica oleracea L. potassium |
| 基金项目:国家自然科学基金（41373118）；广东省科技计划项目（2015A020209191） |
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| 摘要点击次数: 1873 |
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| 中文摘要: |
| 利用水培试验方法，考察了4 种常见植物对重金属铊两种价态Tl+ 和Tl3+ 的吸收速率、铊富集
量，植物体内铊价态存在形式及K+ 影响Tl+ 和Tl3+ 在植物中的富集。结果表明，植物对Tl+ 和Tl3+ 的吸收
速率与铊富集量在不同植物中表现不同。肾蕨表现出对Tl+ 和Tl3+ 的最大吸收速率，分别为0.004、0.007
mg/g·h。狐尾藻对Tl3+ 的铊富集量最大，为681.97 mg/kg（DW）；甘蓝对Tl+ 的铊富集量最大，为473.30
mg/kg（DW）。植物对两种价态铊的吸收富集主要集中在根部。植物根部的铊价态分析表明，通过根系吸收
进入植物体内的铊都以Tl+ 为主要存在形式。当Tl+/Tl3+ 与K+ 比例为1∶25 时，K+ 对Tl+ 和Tl3+ 都具有拮抗
抑制作用，可以影响植物对Tl+ 和Tl3+ 的富集。 |
| 英文摘要: |
| In this study，hydroponic experiments were conducted to investigate the uptake rates and
accumulation of thallium（ Tl+ and Tl3+） in four types of plants and the effect of K+ on accumulation of Tl+ and Tl3+
in plant. The results showed that the uptake rates and accumulation contents of two thallium valence states were
different. Nephrolepis auriculata had he greast uptake rates for Tl+ and Tl3+，which were 0.004 mg/g·h and 0.007 mg/
g·h，respectively. The maximum accumulation of Tl3+ in watermifoil was 681.97 mg/kg（DW），and the maximum
accumulation of Tl+ in cabbage was 473.30 mg/kg（DW）. The uptake and accumulation of two valences were mainly
concentrated in the roots. The valence state in plant roots was Tl+. When the ratio of Tl+/Tl3+ to K+ were 1∶25，K+ had
an antagonistic inhibitory effect on the uptake of Tl+ and Tl3+，which could restrain the accumulation of thallium（Tl+
and Tl3+）in plants. |
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