Phytoaccumulation of heavy metals by aquatic plants
Phytoaccumulation of heavy metals by aquatic plants
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DOI：
10.1016/s0160-4120(03)00091-6
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发表时间：
2004-02-01
影响因子：
11.8
通讯作者：
Côté, R
中科院分区：
文献类型：
--
作者：
Kamal, M;Ghaly, AE;Côté, R
研究了三种水生植物对受污染水体中重金属的去除能力：鹦鹉羽毛(Myriophylhum Aquaticum)、爬行迎春花(Ludwigina Palustris)和薄荷(Mentha Aquustris)。这些植物是从处理城市污水的太阳能水生系统中获得的。这三家工厂都能从受污染的水中去除铁、锌、铜和汞。3种植物对汞、铁、铜、锌的平均去除效率分别为99.8%、76.7%、41.62%和33.9%。锌和铜的去除速率是恒定的(锌为0.48 mg/L/天，铜为0.11 mg/L/天)，铁和汞的去除速率与水体中这些元素的浓度有关，铁的去除速率为7.00~0.41 mg/L/天，汞的去除速率为0.0787~0.0002 mg/L/天。鹦鹉羽毛对毒性的耐受性较强，其次是水薄荷和爬行报春花。重金属毒害对爬行报春花的生长有显著影响。三种植物对重金属的选择性相同(Hg&Gt；Fe&Gt；Cu&Gt；Zn)。对该体系进行的质量平衡表明，沉淀法脱除的锌和铜分别为60.45%~82.61%和38.96%~60.75%。(C)2003爱思唯尔有限公司。保留所有权利。
Three aquatic plants were examined for their ability to remove heavy metals from contaminated water: parrot feather (Myriophylhum aquaticum), creeping primrose (Ludwigina palustris), and water mint (Mentha aquatic). The plants were obtained from a Solar Aquatic System treating municipal wastewater. All the three plants were able to remove Fe, Zn, Cu, and Hg from the contaminated water. The average removal efficiency for the three plant species was 99.8%, 76.7%, 41.62%, and 33.9% of Hg, Fe, Cu, and Zn, respectively. The removal rates of zinc and copper were constant (0.48 mg/l/day for Zn and 0.11 mg/l/day for Cu), whereas those of iron and mercury were dependent on the concentration of these elements in the contaminated water and ranged from 7.00 to 0.41 mg/l/day for Fe and 0.0787 to 0.0002 mg/l/day for Hg. Parrot feather showed greater tolerance to toxicity followed by water mint and creeping primrose. The growth of creeping primrose was significantly affected by heavy metal toxicity. The selectivity of heavy metals for the three plant species was the same (Hg>Fe>Cu>Zn). The mass balance preformed on the system showed that about 60.45-82.61% of the zinc and 38.96-60.75% of the copper were removed by precipitation as zinc phosphate and copper phosphate, respectively. (C) 2003 Elsevier Ltd. All rights reserved.