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Efektivitas EDTA (Ethylenediaminetetracetic Acid) dalam Meningkatkan Akumulasi Timbal pada Saccharum spontaneum yang 'Ihmbuh di Limbah Penambangan Emas

Nuril Hidayati, Titi Juhaeti, Fauzia Syarif


Effectivity of EDTA (EthylenediaminetetraceticAcid) in Increasing Lead Accumulation
of Saccharum spontaneum Grown Under Gold Mine Waste. Lead (Pb) is
known as one of a major metal contaminant in mine tailing. This metal has low solubility,
and in many cases, is not readily available. In most soils capable of supporting plant
grow, the soluble Pb2+ levels are relatively low and will not promote substantial uptake by
the plant. In addition, many plants retain Pb2+ in their roots with only minimal trabsport
to the aboveground plant portions. Therefore, it is important to find ways to enhance the
bioavailability of Pb2+ or to find specific plants that can better translocate the Pb2+ into
harvestable portions for phytoremediation. The success of Pb phytoremediation is to
have significant Pb availability as well as a large quantity of plant biomass with high rate
of growth. This experiment was conducted to obtain both purposes. Saccharum
spontaneum which proven tolerant and dominant in contaminated area as well as potential
in producing high biomass was used in this research.The plants were grown in waste
media added by 100 ppm, 200 ppm and 300 ppm of Pb. Ethylenediaminetetracetine Acid
(EDTA) was applied to increase Pb availability and plant uptake as well as translocation
to the aboveground portions. The results showed that the plant still capable of growing
under the highest level of Pb. EDTA increase Pb availability and plant uptake. Pb accumulation
in the aboveground biomass of EDTA treated plants were relatively higher than
untreated plants.
Key words: Timbal, EDTA, phytoremediation

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