Effects of different concentrations of mercury on accumulation of mercury by five plant species

The paper studied the absorption of Hg by five common herb species selected, Opuntia stricta, Aloe vera, Setcreasea purpurea, Chlorophytum comosum and Oxalis corniculata, in solution with different levels of mercury. We compared the accumulation of roots and shoots of the plants selected in medium containing different concentrations of mercury. The study was to explore what extent of mercury the five plant species were suitable for absorbing and transferring. The mercury amount uptake by five herb species was tested by CVAAS. The results demonstrated that the effect of different concentrations of mercury on the accumulation condition of roots was greater than that of shoots. There was an ideal Hg concentration for transfer by each plant species. Oxalis corniculata was the most suitable for transferring Hg and was more suitable for repairing soils with Hg at concentrations of less than 500 mu g/L. (C) 2017 Elsevier B.V. All rights reserved.