Department of Post-Modern Agriculture, MingDao University, Changhua, Taiwan.
Int J Phytoremediation. 2010 Oct-Dec;12(8):785-97. doi: 10.1080/15226510903534554.
A site in central Taiwan with an area of 1.3 ha and contaminated with Cr, Cu, Ni, and Zn was selected to examine the feasibility of phytoextraction. Based on the results of a preexperiment at this site, a total of approximately 20,000 plants of 12 species were selected from plants of 33 tested species to be used in a large-area phytoextraction experiment at this site. A comparison with the initial metal concentration of 12 plant species before planting demonstrated that most species accumulated significant amounts of Cr, Cu, Ni, and Zn in their shoots after growing in this contaminated site for 31 d. Among the 12 plant species, the following accumulated higher concentrations of metals in their shoots; Garden canna and Garden verbena (45-60 mg Cr kg(-1)), Chinese ixora and Kalanchoe (30 mg Cu kg(-1)), Rainbow pink and Sunflower (30 mg Ni kg(-1)), French marigold and Sunflower (300-470 mg Zn kg(-1)). The roots of the plants of most of the 12 plant species can accumulate higher concentrations of metals than the shoots and extending the growth period promotes accumulation in the shoots. Large-area experiments demonstrated that phytoextraction is a feasible method to enable metal-contaminated soil in central Taiwan to be reused.
台湾中部一个面积为 1.3 公顷、受到铬、铜、镍和锌污染的场地被选中，以检验植物萃取的可行性。基于该场地的预实验结果，从 33 种受测试植物中选择了大约 20,000 株 12 种植物，用于在该场地进行大面积植物萃取实验。与种植前 12 种植物的初始金属浓度进行比较表明，在受污染场地生长 31 天后，大多数植物在地上部分积累了大量的铬、铜、镍和锌。在这 12 种植物中，以下几种植物在地上部分积累了更高浓度的金属：美人蕉和紫薇（45-60mgCrkg(-1)），中国九重葛和长寿花（30mgCukg(-1)），彩虹粉色矮牵牛和向日葵（30mgNikkg(-1)），金盏花和向日葵（300-470mgZnakg(-1)）。大多数 12 种植物的根部比地上部分能积累更高浓度的金属，而且延长生长周期会促进地上部分的积累。大面积实验表明，植物萃取是一种可行的方法，可以使台湾中部受金属污染的土壤得以再利用。
