[Petridium revolutum, a promising plant for phytoremediation of Cu-polluted soil].
A field survey on the Petridium revolutum growing on the Cu mining spoils in Yunnan Province and related greenhouse hydroponic sand culture experiment showed that when growing on the soil with an average Cu concentration of 2 432 mg x kg(-1) DW and the maximum Cu concentration of 7 554 mg x kg(-1) DW, P. revolutum had a large amount of aboveground biomass, with the maximum dry weight of 40.05 g x plant(-1) DW and the average dry weight of 18.33 g x plant(-1) DW. The average and maximum Cu contents were 201 and 567 mg x kg(-1) DW in aboveground biomass, and 346 and 1723 kg(-1) DW in underground biomass, respectively. The transfer factor of Cu reached a maximum of 3.88, with an average of 0.81. Under quartz sand culture condition, P. revolutum could grow well when the Cu concentration in nutrient solution was 7 mg x L(-1). The accumulation of Cu by P. revolutum plant increased significantly with increasing Cu concentration, with the most of absorbed Cu concentrated in underground biomass. It was suggested that P. revolutum had a remarkable tolerance to Cu and a potential capacity of Cu accumulation, and could be used in the phytoremediation of Cu-polluted soils.
Zheng
Jiemin
J
Institute of Nuclear Agricultural Sciences, College of Agronomy and Life Science and Department of Environment Engineering, College of Environment and Natural Resource, Zhejiang University, Hangzhou 310029, China. jmzh04@163.com
Lou
Liping
L
Wang
Shiheng
S
Tang
Shirong
S
D001673:Biodegradation, Environmental; D003300:Copper / Q000032:analysis* / Q000493:pharmacokinetics; D008906:Mining; D010944:Plants / Q000378:metabolism*; D012987:Soil / Q000032:analysis*; D012989:Soil Pollutants / Q000032:analysis* / Q000493:pharmacokinetics
D012987:Soil; D012989:Soil Pollutants; D003300:Copper