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    Comparative Study of Cd, Pb, and Ni removal potential by Salvinia natans (L.) All. and Lemna minor L.: Interactions with Growth Parameters
    (Ars Docendi, 2018) Leblebici, Zeliha; Kar, Musa; Yalcin, Vesile
    The aim of this study was to identify the biological responses and phytoremediation capability of two aquatic macropyhtes: Salvinia natans and Lemna minor. Lemna and Salvinia species were exposed to different concentrations of Pb, Cd, and Ni for 7 days. The bioconcentration factors (BCF) of heavy metals from water to these two aquatic macropyhtes were estimated and the removal potential of heavy metals was assessed. After 7 days, some biological parameters were measured, including metal accumulations in leaves, photosynthetic pigmentations, Lipid peroxidation activity, and growth rates. For S. natans, the highest Pb accumulation was found in 50 mg l(-1) concentration. The amount of chlorophyll a (chl a) in L. minor was reduced to a minimum value of 0.120 mg g(-1) with the 8 mg l(-1) Cd concentration. The Relative Growth Rate (RGR) values of both plants were negatively associated with metal treatment. The levels of Malondialdehyde (MDA) in S. natans increased to a maximum value of 7.174 nmol/g with 50 mg l(-1) at Pb concentration-dependent and time-depended action. S. natans was a more effective Pb and Ni accumulator than L. minor, but L. minor was a more effective Cd accumulator than S. natans. Our findings might be useful for the phytoremediation of water polluted with heavy metals.