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Abstract - Issue Sep 2015, 36 (5) Back
nstantaneous and historical temperature effects on a-pinene
Phytoremediation
potential of Cd and Zn by wetland plants,
Colocasia
esculenta L. Schott., Cyperus malaccensis Lam., and
Typha
angustifolia L. grown in hydroponics
P. Chayapan1,
M. Kruatrachue1,2*, M. Meetam1 and P. Pokethitiyook1
1Department of
Biology, Faculty of Science, Mahidol University, Rama 6 Road, Bangkok 10400,
Thailand
2Mahidol
University International College, Mahidol University, Nakhon Pathom 73170,
Thailand
*Corresponding
Author E-mail: maleeya.kru@mahidol.ac.th
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Publication
Data
Paper received:
11 March 2014
Revised received:
07 October 2014
Re-revised received:
05 January 2015
Accepted:
20 March 2015
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Abstract
Cadmium
and zinc phytoremediation potential of wetland plants, Colocasia
esculenta, Cyperus malaccensis, and Typha angustifolia, was
investigated. Plants were grown for 15 days in nutrient solutions containing
various concentrations of Cd (0, 5, 10, 20, 50 mg l-1) and Zn (0, 10,
20, 50, 100 mg l-1).? T. angustifolia was tolerant to both metals as
indicated by high RGR when grown in 50 mg l-1 Cd and 100 mg l-1
Zn solutions. All these plants accumulated more metals in their underground
parts and > 100 mg kg-1 in their aboveground with TF values < 1.
Only C. esculenta could be considered a Zn hyperaccumulator because it
could concentrate > 10,000 mg kg-1 in its aboveground parts with TF >
1. T. angustifolia exhibited highest biomass production and highest Cd
and Zn uptake, confirming that this plant is a suitable candidate for
treating of Cd contaminated soil/sediments. ?
Key
words
Cadmium,
Colocasia esculenta, Cyperus malaccensis, Typha angustifolia, Zinc
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