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The Potential of Eleocharis acicularis for Phytoremediation: Case Study at an Abandoned Mine Site
Phytoremediation, a plant‐based and cost‐effective technology for the cleanup of contaminated soil and water, is receiving increasing attention. In this study, the aquatic macrophyteEleocharis aciculariswas examined for its ability to take up multiple heavy metals and its potential application for phytoremediation at an abandoned mining area in Hokkaido, Japan. Elemental concentrations were measured in samples ofE. acicularis, water, and soil collected from areas of mine tailing and drainage. The results reveal that Pb, Fe, Cr, Cu, Ni, and Mn accumulation in the plants increased over the course of the experiment, exceeding their initial concentrations by factors of 930, 430, 60, 25, 10, and 6, respectively. The highest concentrations of Fe, Pb, Zn, Mn, Cr, Cu, and Ni within the plants were 59500, 1120, 964, 388, 265, 235, and 47.4 mg/kg dry wt., respectively, for plants growing in mine drainage after 11 months of the experiment. These results indicate thatE. acicularisis a hyperaccumulator of Pb. We also found high Si concentrations inE. acicularis(2.08%). It is likely that heavy metals exist in opal‐A within cells of the plant. The bioconcentration factors (BCF: ratio of metal concentration in the plant shoots to that in the soil) obtained for Cr, Cu, Zn, Ni, Mn, and Pb were 3.27, 1.65, 1.29, 1.26, 1.11, and 0.82, respectively. The existence of heavy metals as sulphides is thought to have restricted the metal‐uptake efficiency of E. acicularis at the mine site. The results of this study indicate thatE. acicularisshows great potential in the phytoremediation of mine tailing and drainage rich in heavy metals.
The Potential of Eleocharis acicularis for Phytoremediation: Case Study at an Abandoned Mine Site
Phytoremediation, a plant‐based and cost‐effective technology for the cleanup of contaminated soil and water, is receiving increasing attention. In this study, the aquatic macrophyteEleocharis aciculariswas examined for its ability to take up multiple heavy metals and its potential application for phytoremediation at an abandoned mining area in Hokkaido, Japan. Elemental concentrations were measured in samples ofE. acicularis, water, and soil collected from areas of mine tailing and drainage. The results reveal that Pb, Fe, Cr, Cu, Ni, and Mn accumulation in the plants increased over the course of the experiment, exceeding their initial concentrations by factors of 930, 430, 60, 25, 10, and 6, respectively. The highest concentrations of Fe, Pb, Zn, Mn, Cr, Cu, and Ni within the plants were 59500, 1120, 964, 388, 265, 235, and 47.4 mg/kg dry wt., respectively, for plants growing in mine drainage after 11 months of the experiment. These results indicate thatE. acicularisis a hyperaccumulator of Pb. We also found high Si concentrations inE. acicularis(2.08%). It is likely that heavy metals exist in opal‐A within cells of the plant. The bioconcentration factors (BCF: ratio of metal concentration in the plant shoots to that in the soil) obtained for Cr, Cu, Zn, Ni, Mn, and Pb were 3.27, 1.65, 1.29, 1.26, 1.11, and 0.82, respectively. The existence of heavy metals as sulphides is thought to have restricted the metal‐uptake efficiency of E. acicularis at the mine site. The results of this study indicate thatE. acicularisshows great potential in the phytoremediation of mine tailing and drainage rich in heavy metals.
The Potential of Eleocharis acicularis for Phytoremediation: Case Study at an Abandoned Mine Site
Hoang Ha, Nguyen Thi (author) / Sakakibara, Masayuki (author) / Sano, Sakae (author) / Hori, Rie S. (author) / Sera, Koichiro (author)
CLEAN – Soil, Air, Water ; 37 ; 203-208
2009-03-01
6 pages
Article (Journal)
Electronic Resource
English
The Potential of Eleocharis acicularis for Phytoremediation: Case Study at an Abandoned Mine Site
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