Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
580064 | Journal of Hazardous Materials | 2010 | 6 Pages |
Abstract
Because of its toxicity to animals and humans, cadmium (Cd) is an environmentally important heavy metal. Consequently, researchers are interested in using hyperaccumulator and accumulator plants to decontaminate Cd polluted soils. To investigate Cd tolerance, uptake and accumulation by Amaranthus hybridus L., Cd concentration gradients were applied to a soil (at rates of 0, 30, 60, 90, 120, 150 and 180 mg kgâ1) and hydroponics solutions (at rates of 0, 5, 10, 15, 20, 30, and 40 mg Lâ1) following a field survey. A. hybridus grew normally at added Cd concentrations â¤Â 90 mg kgâ1 and â¤Â 20 mg Lâ1 in the soil culture and in the hydroponics solutions, respectively. In the hydroponics solutions, peroxidase activity showed a quadratic relationship and catalase activity changed irregularly with increasing Cd concentrations. The highest Cd concentration and accumulation in shoots were 241.56 mg kgâ1 and 1006.95 μg potâ1 in the soil culture, and 354.56 mg kgâ1 and 668.42 μg potâ1 in the hydroponics experiment. Bioconcentration factors in soil culture and hydroponics solutions were 0.58-1.22 and 5.18-17.55, and translocation factors were 0.64-1.50 and 0.33-0.92, respectively. A. hybridus has potential phytoremediation capability in Cd polluted soils.
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Authors
Xiaochuan Zhang, Shirong Zhang, Xiaoxun Xu, Ting Li, Guoshu Gong, Yongxia Jia, Yun Li, Liangji Deng,