期刊
INTERNATIONAL JOURNAL OF PHYTOREMEDIATION
卷 20, 期 5, 页码 483-489出版社
TAYLOR & FRANCIS INC
DOI: 10.1080/15226514.2017.1374331
关键词
Accumulation; bioconcentration factor; Pb-contaminated soil; remediation; translocation factor
资金
- UGC-MANF, India [MANF-SIK-PUN-4078]
Coronopus didymus was examined in terms of its ability to remediate Pb-contaminated soils. Pot experiments were conducted for 4 and 6 weeks to compare the growth, biomass, photosynthetic efficiency, lead (Pb) uptake, and accumulation by C. didymus plants. The plants grew well having no visible toxic symptoms and 100% survivability, exposed to different Pb-spiked soils 100, 350, 1500, and 2500 mg kg(-1), supplied as lead nitrate. After 4 weeks, root and shoot concentrations reached 1652 and 502 mg Pb kg(-1) DW, while after 6 weeks they increased up to 3091 and 527 mg Pb kg(-1) DW, respectively, at highest Pb concentration. As compared to the 4 week experiments, the plant growth and biomass yield were higher after 6 weeks of Pb exposure. However, the chlorophyll content of leaves decreased but only a slight decline in photosynthetic efficiency was observed on exposure to Pb at both 4 and 6 weeks. The Pb accumulation was higher in roots than in the shoots. The bioconcentration factor of Pb was > 1 in all the plant samples, but the translocation factor was < 1. This suggested C. didymus as a good candidate for phytoremediation of Pb-contaminated soils and can be used for future remediation purposes.
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