The ability of Azolla caroliniana to remove heavy metals (Hg(II), Cr(III), Cr(VI)) from municipal waste water
The ability of Azolla caroliniana to remove heavy metals (Hg(II), Cr(III), Cr(VI)) from municipal waste water
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DOI：
10.1016/j.chemosphere.2003.11.015
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发表时间：
2004-04-01
期刊：
影响因子：
8.8
通讯作者：
Ostrowski, J
中科院分区：
文献类型：
--
作者：
Bennicelli, R;Stepniewska, Z;Ostrowski, J
本文旨在研究一种小型水生蕨类植物--红萍（Azolla caroliniana Willd.）（满江红科），净化受Hg、Cr污染的沃茨。许多植物都具有积累重金属的能力，水蕨A就是其中之一。卡罗莱纳州。在12天的实验中，蕨类植物生长在含有Hg 2+，Cr 3+和CrO 4 2-离子的营养液中，每种离子的浓度为0.1，0.5和1.0 mg dm（-3）。这些离子的存在引起20-31%的A. caroliniana生长，最高的Hg（II）离子的存在下，与对照相比。在实验的第12天之后，溶液中的金属含量降低至0-0.25 mg dm（-3），并且该降低包括在74%（Cr 3 + 1.0 mg dm（-3）处理）和100%（CrO 42 - 0.1 mg dm（-3）处理）之间。与0.5和1.0 mg dm（-3）处理相比，蕨类植物从0.1 mg dm（-3）处理中吸收的金属量较少。明天早上caroliniana组织中的重金属浓度范围为71至964 mg kg（-1）dm;含Cr（III）营养液中的浓度最高。(C)2003爱思唯尔有限公司。保留所有权利。
The aim of this paper was to investigate the capacity of a small water fern, Azolla caroliniana Willd. (Azollaceae), to purify waters polluted by Hg and Cr. Many plants are capable of accumulating heavy metals (called hyperaccumulators) and one of them is the water fern A. caroliniana. During 12 days of the experiment the fern was grown on the nutrient solution containing Hg2+, Cr3+ and CrO42- ions, each in a concentration 0.1, 0.5 and 1.0 mg dm(-3). The presence of these ions caused a 20-31% inhibition of A. caroliniana growth, the highest in the presence of Hg(II) ions, in comparison to the control. After day 12 of the experiment, metal contents the solution decreased to 0-0.25 mg dm(-3), and this decrease comprised between 74 (Cr3+ 1.0 mg dm(-3) treatment) and 100% (CrO42- 0.1 mg dm(-3) treatment). The fern took a lesser quantity of the metals from 0.1 mg dm(-3) treatments compared to 0.5 and 1.0 mg dm(-3) treatments. In the A. caroliniana tissues the concentration of heavy metals under investigation ranged from 71 to 964 mg kg(-1) dm; the highest level being found for Cr(III) containing nutrient solution. (C) 2003 Elsevier Ltd. All rights reserved.