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

Abstract

ABSTRACT
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, waste