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Plant-metal (Al, Cd, Fe, Mn, Mo, Pb, Zn) interactions in contaminated freshwater sediments of the Fly River Floodplain, Papua New Guinea.

Authors:

B T Yaru,

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Environment Ok Tedi Mining Ltd. PO Box 1 Tabubil Papua New Guinea
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R T Buckley ,

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Environmental Sciences University of Technology Sydney, NSW 2007
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M T Rau

About M
Environment Ok Tedi Mining Ltd. PO Box 1 Tabubil Papua New Guinea
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Abstract

The uptake of Al, Cd, Fe, Mn, Mo, Pb and Zn by 23 aquatic macrophytes species from mine-impacted sediments from the Fly River flood plain in Papua New Guinea was investigated by analysis of sediment, water and plant samples. Increased metal concentrations in aquatic plants were observed at sites contaminated by mine-derived sediment. The study also showed that the plant metals were primarily derived from the sediment, except molybdenum, which was also correlated to it dissolved species. The factor increase ranges for Cd (2-9), Fe (2-95), Mn (2-174), Pb (2-10), Zn (2-79, Al (2-7) and Mo (2-29) were calculated relative to background concentrations. These factors increased with the degree of impact from mire-derived sediment. Based on analysis of the data presented in this study the monocots L. Hexandra, H. Acutigluma and I. Polystachium could be targeted for further study. Only I. Polystachium appear to be the best choice for monitoring of the impact of mine-derived sediment on aquatic plant species in the Fly River. Leaves generally have higher metal concentration than stems in monocots. Of the two dicots which were compared, L. Hyssopifolia displayed a trend common to all sites, where metal concentrations decrease in the following pattern seeds
How to Cite: Yaru, B.T., Buckley, R.T. and Rau, M.T., 2010. Plant-metal (Al, Cd, Fe, Mn, Mo, Pb, Zn) interactions in contaminated freshwater sediments of the Fly River Floodplain, Papua New Guinea.. Wetlands Australia, 20(1), pp.1–27. DOI: http://doi.org/10.31646/wa.245
Published on 08 Jan 2010.
Peer Reviewed

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