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To select suitable plants for phytoextraction of Cd-contaminated soils, we evaluated the phytoextraction potential of five local Cd-accumulators: L., L., Roxb., L., and Boreau. The plants were grown in three naturally contaminated soils with different total Cd levels (1.57, 3.89, and 22.4 mg kg). Throughout the experimental period, no plants showed any visible symptoms of metal toxicity. The Cd uptake of was the greatest in the S-YS soil (105 μg plant) and among the greatest in the S-HC soil and S-TJ soil. Besides, exhibited the highest bioconcentration factor (12.3) in three soils. To improve the phytoextraction efficiency of , we applied four low molecular weight organic acids (LMWOAs): tartaric acid, malic acid, oxalic acid, and citric acid. Malic acid was more effective in enhancing Cd uptake by than the other LMWOAs. Therefore, may be a potential choice in actual remediation projects. Moreover, application of malic acid is an effective way to increase the phytoextraction efficiency of .
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| http://dx.doi.org/10.1080/15226514.2019.1663488 | DOI Listing |
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