A newly found cadmium accumulator-Malva sinensis Cavan.

作者：Zhang, Shirong^*; Chen, Mingying; Li, Ting; Xu, Xiaoxun; Deng, Liangji

来源：Journal of Hazardous Materials, 2010, 173(1-3): 705-709.

DOI：10.1016/j.jhazmat.2009.08.142

• Mallow flowers
• Cd-hyperaccumulator
• Tolerance
• Bioconcentration factor
• Translocation factor

Screening hyperaccumulators and accumulators is a key step in the phytoremediation of soils contaminated by heavy metals. A pot experiment was conducted involving a soil Cd concentration gradient (0, 50, 75, 100, 125, 150, 175, and 200 mg kg(-1)) to determine if Malva sinensis Cavan. from two lead-zinc mines in Kangding and Yajiang in western Sichuan, China, is a Cd-hyperaccumulator. The highest Cd concentrations in plant shoots from Kangding and Yajiang were 154.30 and 122.77 mg kg(-1), respectively, at a soil Cd concentration of 200 mg kg(-1). The largest amounts of accumulation in plant shoots from Kangding and Yajiang were 700.5 and 1403.2 mu g pot(-1), respectively. The bioconcentration factors in shoots were 0.53-1.03 for Kangding and 0.69-1.25 for Yajiang. Moreover, all translocation factors of plants from the two sites were over 1.0. Therefore, M. sinensis can be classified as a Cd-accumulator or non-standard Cd-hyperaccumulator.

• 出版日期2010-1-15
• 单位四川农业大学