利用離子束提高水生植物對富營養(yǎng)化水體修復(fù)功能的初步研究

Using ion beam biotechnology in combination with soil-less plant cultivation on artificial substratum (floating beds), the experiments were conducted with Ipomoea aquatica Forsk. Plants were attached to floating-beds which were placed on the surface of artificially nutrient-enriched tank water, in order to study the purification and remediation efficiency of ion beam-treated I.aquatica cultivars. The results show that N+ ion beams with 25keV energy and dosages of 0, 2.6, 3.9, 5.2, 6.5, 7.8, 9.1 ×1013N+ (ions)/cm2 affected I. aquatica dry seeds differently, with the dose of 3.9 × 1013N+ (ions)/cm2 improving effectively the performance as expressed by various biological indices. After ion beam application, I. aquatica cultivars grew well in nutrient-enriched water bodies, increasing the growth of leaves and stem, number of leaves, length and area of roots, plant height, and weight more remarkably than observed in the control. The net removing rates of TN, TP were as high as 75% and 82%, respectively. Especially under the dose of 3.9 × 1013N + (ions)/cm2, the net removing rates of TN, TP were highest, for 77% and 85%, respectively. It was proved that ion beam application improves phytoremediation and may be used to purify nutrient rich water bodies.

作 者： LI Miao WU Yue-Jin ZHANG Jun YU Han-Qing WU Xiao-Lei YU Zeng-Liang   作者單位： LI Miao,WU Yue-Jin,ZHANG Jun,YU Zeng-Liang(Key Laboratory of Ion Beam Bioengineering, Institute of Plasma Physics, the Chinese Academy of Sciences, Hefei, China 230031)

YU Han-Qing(School of Chemistry and Material Science, the University of Science and Technology of China, Hefei, China 230026)

WU Xiao-Lei(Department of Environmental Science and Engineering, Tsinghua University, Beijing , China 100084) 

刊 名： 水生生物學報  ISTIC PKU 英文刊名： ACTA HYDROBIOLOGICA SINICA  年，卷(期)： 2006 30(6)  分類號： X173  關(guān)鍵詞： Ion beam treatment   Aquatic macrophyte   Ipomoea aquatica Forsk   Nutrient-enriched waters   Remediation capacity  

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