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In vitro phytoremediation potential of heavy metals by duck weed Lemna
polyrrhiza L. (Lemnaceae) and its combustion process as manure value

Journal of Environment & Biotechnology Research, Vol. 6, No. 1, Pages 82-87, January 2017

M.N. Abubacker, C. Sathya

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ABSTRACT

In vitro experiments on chromium, copper, lead and zinc bioaccumulation using duck weed Lemna polyrrhiza L.
(Lemnaceae) was conducted with 5, 10 and 20 mg/100 mL concentrations for a period of 20 days. The SEM-EDX
elemental analysis was used to characterize the interaction between the metal and plant. The results revealed the
bioaccumulation of lead was high as 20.91%, followed by copper 9.71%, zinc 5.66% and chromium 1.86% was
observed. The combustion process of metal-loaded L. polyrrhiza biomass shows the total reduction of lead 1.72%,
zinc 1.47%, chromium 0.93% and copper 0.86%. The combusted biomass in the form of ash 10% + river sand passed
through 1 mm sieve, sterilized was supplemented to Brassica juncea pot culture, which revealed the healthy
growth and ensured the manure value of metal-loaded biomass.
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Journal of Environment and Biotechnology Research
Volume 6, Number 1, 2017, pp. 82-87
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