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EVALUATION OF THREE ORNAMENTAL PLANTS FOR PHYTOREMEDIATION OF PB-CONTAMINED SOIL

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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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Keywords: Celosia cristata pyramidalis; Pb-contaminated soil; accumulator; phytoremediation

Document Type: Research Article

Affiliations: 1: School of Environmental and biological Engineering,Liaoning Shihua University, Fushun, China 2: Key Laboratory for Ecological Metallurgy of Multimetallic Mineral, School of Materials & Metallurgy,Northeastern University, Shenyang, China 3: School of Petrochemical Engineering,Liaoning Shihua University, Fushun, China 4: Tianjin Key Laboratory of Environmental Remediation and Pollution Control,College of Environmental Science and Engineering, Nankai, University, Tianjin, China 5: Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang, China

Publication date: April 1, 2013

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