Sự hấp thụ urani từ đất của cỏ vetiver (vetiver zizanioides (l.) nash)

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Tác giả:

Ngôn ngữ: vie

Ký hiệu phân loại: 571.6 Cell biology

Thông tin xuất bản: Hóa học, 2012

Mô tả vật lý: 656-662

Bộ sưu tập: Báo, Tạp chí

ID: 639646

Uranium uptake ofvetiver grass (Vetiveria zizanioides (L.) Nash) from Eutric Fluvisols (AK), Albic Acrisols (LP), Dystric Fluvisols (IT) and Ferralic Acrisols (TC) in northern Vietnam is assessed. The soils were mixed with aqueous solution of uranyl nitrate to make soils be contaminated with uranium at 0, 50, 100, 250 mg per kg before planting the grass. The efficiency of uranium uptake by the grass was assessed based on the soil-to-plant transfer factor (TFu, kg). It was found that the TFu values are dependent upon the soils properties. CEC facilitates the uptake and the increase soil pH could reduce the uptake and translocation of uranium in the plant. Organic matter content as well as ferrous and potassium inhibit the uranium uptake of the grass. It was revealed that the lower fertile soil the higher uranium uptake. The grass could tolerate to the high extent (up to 77 percent) of uranium in soils and could survive and grow well without fertilization. The translocation of uranium in root for all the soil types studies almost higher than that in its shoot. It seems that vetiver grass could potentially be used for the purpose of phytoremediation of soils contaminated with uranium.
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