Potensi Hipertoleransi Calopogonium mucunoides, Centrosema pubescens dan Cajanus cajan yang Tumbuh pada Limbah Penambangan Emas Terkontaminasi Sianida dan Merkuri

Potency of Hypertolerance of Calopogonium mucunoides, Centrosema pubescens and Cajanus cajan . Grown on Gold Mine waste Media Contaminated by Cyanide and Mercury. Cleaning up contaminated environment by using green technology of phytoremediation is urgently needed in the future. These plants will be utilized as hyperaccumulators for cleaning up the contaminated sites. The results of plant screening showed that some plant species, which grow in the contaminated areas, indicated high tolerance and potentially effective in accumulating cyanide and mercury in their roots and above ground portions. Those plants are Calopogonium mucunoides and Centrosema pubescens. This research aims to examine the potency of three candidate plants i.e Calopogonium mucunoides, Centrosemapubescens and Cajanus cajan, that were grown under three different media i.e tailing waste of PT ANTAM contaminated by cyanide, public mine or PET1 waste that were contaminated by mercury and non contaminated top soil as a control. The results showed that all of the species were able to grow under contaminated media and showed a considerable tolerance by indicated high cyanide and mercury accumulation in their shoot and root. Among those three plants, Centrosema pubescens showed the highest level of cyanide and mercury accumulation i.e 3.29 mg I- ' CN (in the shoot), 34.72 mg I-' Hg (in the shoot) and 17.47 mg lk' Hg (in the root), followed by Calopogonium mucunoides i.e 14,97 mg I-' CN (in the root). Concentration ratio of CN and Hg accumulation in shoot/root of Centrosemapubescens was >I indicating that this plant, according to the definition can beconsidered as a hyperaccumulator. Key Words: Calopogonium mucunoides, Centrosemapubescens, Cajanus cajan, mercury, cyanide, wast