Sedum plumbizincicola · Atlas of Contaminated Sites

How it works

Mechanisms: hyperaccumulationphytoextraction
Native range: Lead-zinc mining areas of Zhejiang Province, China

Contaminants

Contaminant	Evidence	What was shown
Cadmium	field	An 8-hectare trial in Yunnan on acid farmland (pH 5.61; 2.58 mg/kg Cd): first harvest 1.95 t/ha dry biomass at 170 mg/kg Cd, i.e. 339 g Cd/ha; after two seasons total soil Cd fell from 2.58 to 1.53 mg/kg (Wang et al. 2023). On calcareous soil in Henan, total Cd fell 32.8% after three successive phytoextractions (Zhou et al. 2018). Wang et al., Phytoextraction of highly cadmium-polluted agricultural soil by Sedum plumbizincicola: an eight-hectare field study, Sci. Total Environ. 905:167216, 2023 Zhou et al., Repeated phytoextraction of metal contaminated calcareous soil by hyperaccumulator Sedum plumbizincicola, Int. J. Phytoremediation 20:1243, 2018
Zinc	field	In the calcareous-soil trial total Zn fell 19.7% after three cycles (Zhou et al. 2018). In long-term trials intercropping with maize raised extraction efficiency, with maize grain within the national Cd limit (Deng et al. 2016). Zhou et al., Int. J. Phytoremediation 20:1243, 2018 Deng et al., Long-term field phytoextraction of zinc/cadmium contaminated soil by Sedum plumbizincicola under different agronomic strategies, Int. J. Phytoremediation 18:134, 2016

Contaminant

Evidence

What was shown

field

An 8-hectare trial in Yunnan on acid farmland (pH 5.61; 2.58 mg/kg Cd): first harvest 1.95 t/ha dry biomass at 170 mg/kg Cd, i.e. 339 g Cd/ha; after two seasons total soil Cd fell from 2.58 to 1.53 mg/kg (Wang et al. 2023). On calcareous soil in Henan, total Cd fell 32.8% after three successive phytoextractions (Zhou et al. 2018).

Zinc

field

In the calcareous-soil trial total Zn fell 19.7% after three cycles (Zhou et al. 2018). In long-term trials intercropping with maize raised extraction efficiency, with maize grain within the national Cd limit (Deng et al. 2016).

Limits

Suited to farmland with low to moderate cadmium; uptake tracks extractable Cd and drops where organic matter and pH keep it immobilised (Wang et al. 2023). The second harvest yields less than the first. Field trials are almost all Chinese: data from other climates are lacking. Harvested biomass is rich in Cd and Zn and must be disposed of or treated.