EVALUATION OF THREE ORNAMENTAL PLANTS FOR PHYTOREMEDIATION OF PB-CONTAMINED SOIL
Characteristics of accumulation and tolerance of lead (Pb) in Quamolit pennata, Antirrhinum majus L. and Celosia cristata pyramidalis were investigated to identify Pb-accumulating plants. In this study, pot culture experiment was conducted to assess whether these plants are Pb-hyperaccumulators
or accumulators. The results indicated that the Pb enrichment factor (concentration in plant/soil) and Pb translocation factor (concentration in shoot/root) of these plants were principally <1 in pot culture and concentration gradient experiments. However, the Pb concentration in Celosia
cristata pyramidalis shoots was higher than 1000 mg kg−1, the threshold concentration for a Pb-hyperaccumulator. Shoot biomass of Celosia cristata pyramidalis had no significantly (p < 0.05) variation compared to the control. Based on these results, only Celosia cristata
pyramidalis could be identified as a Pb-accumulator.
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Celosia cristata pyramidalis;
Document Type: Research Article
School of Environmental and biological Engineering,Liaoning Shihua University, Fushun, China
Key Laboratory for Ecological Metallurgy of Multimetallic Mineral, School of Materials & Metallurgy,Northeastern University, Shenyang, China
School of Petrochemical Engineering,Liaoning Shihua University, Fushun, China
Tianjin Key Laboratory of Environmental Remediation and Pollution Control,College of Environmental Science and Engineering, Nankai, University, Tianjin, China
Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China
April 1, 2013