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| Study on heavy mental thallium biosorption by common plants |
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| DOI：10.16768/j.issn.1004-874X.2018.04.015 |
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| Abstract: |
| 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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