Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2018, Vol. 34 ›› Issue (22): 103-108.doi: 10.11924/j.issn.1000-6850.casb18030128

Special Issue: 土壤重金属污染

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Three Kinds of Plants: Remediation on Soil Contaminated by Cadmium

  

  • Received:2018-03-26 Revised:2018-05-30 Accepted:2018-06-04 Online:2018-08-07 Published:2018-08-07

Abstract: To explore the application characteristics and effects of phytoremediation technology on the soil contaminated by cadmium (Cd) in Jiyuan, a pot experiment using actual soil contaminated by Cd was conducted to compare the Cd tolerance, enrichment, translocation and remediation efficiency of three plants, namely Bidens pilosa, Multi florum and Indian mustard. The results showed that: the biomass of three plants was not significantly reduced when they were grown on soil polluted by Cd, and all of them had strong tolerance for Cd; in addition, the three plants had different enrichment features for Cd, specifically, Cd content in the aboveground part followed the order: Bidens pilosa>Indian mustard>Multi florum; inversely, Cd in the underground part of Multi florum was higher than that of the other two, and the Cd content in the mild and heavy polluted soil reached 11.95 mg/L and 28.56 mg/L, respectively; furthermore, Bidens pilosa had higher capacity to transfer Cd, and the translocation coefficient in the mild polluted soil was highest, reaching 2.23; moreover, Bidens pilosa had better capacity to remediate soil contaminated by Cd, and the Cd remediation efficiency was 2.04% and 1.59% in mild and heavyy polluted soil. In summary, the biomass, enrichment factor and translocation factor of Bidens pilosa were higher than that of Multi florum and Indian mustard. In conclusion, Bidens pilosa could be used as one of effective plants for restoring soil contaminated by Cd in Jiyuan, which could provide theoretical guidance and technical base for local soil Cd pollution treatment.