Phytoremediation of cadmium-contaminated farmland soil by the hyperaccumulator Beta vulgaris L. var. cicla.

摘要

A field study was conducted to evaluate the phytoremediation efficiency of cadmium(Cd) contaminated soil utilizing the Cd hyperaccumulator Beta vulgaris L. var. cicla during one growing season (about 2 months) on farmland in Zhangshi Irrigation Area, the representative wastewater irrigation area in China. Results showed that B. vulgaris L. var. cicla is a promising plant in the phytoremediation of Cd contaminated farmland soil. The maximum of Cd phytoremediation efficiency by B. vulgaris L. var. cicla reached 144.6 mg/ha during one growing season. Planting density had a significant effect on the plant biomass and the overall Cd phytoremediation efficiency (p<0.05). The amendment of organic manure promoted the biomass increase of B. vulgaris L. var. cicla (p<0.05) but inhibited the Cd phytoremediation efficiency.