Bioaccumulation of nickel by five wild plant species on nickel-contaminated soil

Abstract

A number of plant species have adapted well in the soil conditions of the mining area and were capable to accumulate nickel in the aerial part of plants. The differences of tolerance and bioaccumulation on Ni contaminated soil on five plant species obtained from Ni post-mining land were in vestigated in pot experiment. The results showed that Sarcotheca celebica had a high tolerance (root tolerance index of 128.45% and shoot tolerance index of 219.78%) and its capability to accumulate Ni in shoot (Translocation Factor value 8.67) was higher than that in the root. Tephrosia sp., Mimosa pigra and Celtis occidentalis were tolerance species that accumulated more Ni in the roots than in the shoots. Melastoma malabathricum was able to accumulate Ni the shoot in limited quantities.