Phytoremediation Ability of Solanum nigrum L. to Cd-Contaminated Soils with High Levels of Cu, Zn, and Pb

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• 作者：Cailian Yu ; Xianlong Peng ; Hong Yan ; Xiaoxia Li…
• 关键词：Solanum nigrum L. ; Cd ; Cu ; Zn ; Pb
• 刊名：Water, Air, and Soil Pollution
• 出版年：2015
• 出版时间：May 2015
• 年：2015
• 卷：226
• 期：5
• 全文大小：1,740 KB
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• 作者单位：Cailian Yu (1)
  Xianlong Peng (2)
  Hong Yan (1)
  Xiaoxia Li (1)
  Zhenhua Zhou (1)
  Tingliang Yan (1)
  
  1. Institute of Chemical and Environmental Engineering, Harbin University of Science and Technology, Harbin, China
  2. Resources and Environmental Sciences College, Northeast Agricultural University, Harbin, China
  
• 刊物类别：Earth and Environmental Science
• 刊物主题：Environment
  Environment
  Atmospheric Protection, Air Quality Control and Air Pollution
  Waste Water Technology, Water Pollution Control, Water Management and Aquatic Pollution
  Terrestrial Pollution
  Hydrogeology
  
• 出版者：Springer Netherlands
• ISSN：1573-2932

文摘

Solanum nigrum L., a potential cadmium (Cd) hyper-accumulator, has not currently been investigated to identify if it has a strong simultaneous accumulative ability to Cd, copper (Cu), zinc (Zn), or lead (Pb) in contaminated soils. In this study, a pot culture experiment was conducted to investigate the phytoremediation effects of S. nigrum L. on these heavy metals. The potential hyper-accumulative characteristics of S. nigrum L. were also discussed. The results showed that S. nigrum L. remediation effects were not inhibited by multi-heavy metals in contaminated soil. On the contrary, the height and wet and dry weights of S. nigrum L. increased compared to the control treatments and to treatments using only one heavy metal contaminant. Results from the Cd treatment experiments showed 1.66- and 1.45-fold increases in stem and root levels; there were also 1.24-, 2.17-, and 1.61-fold extraction increases in the leaves, stems, and roots, respectively. The differences found in shoot and root bioaccumulation coefficient (BC) factors for multi-heavy metal (MHM) treatment were higher than for a single Cd treatment. These results indicate that S. nigrum L. could stimulate biomass production and that it has a strong ability to tolerate and accumulate Cd in contaminated soils with Pb, Zn, and Cu. This study shows that the remediation scope for S. nigrum L. is greater than currently believed and that it will also remove Pb, Zn, and Cu while extracting Cd from contaminated soils.