Phytoremediation of heavy metal‐contaminated water and sediment by Eleocharis acicularis

Wiley - Tập 39 Số 8 - Trang 735-741 - 2011
Masayuki Sakakibara1, Yuko Ohmori1,2, Nguyen Thi Hoang Ha1, Sakae Sano3, K. Sera4
1Graduate School of Science and Engineering, Ehime University, Matsuyama, Japan
2Taisei Kiso Sekkei Co., Ltd., Tokyo, Japan
3Faculty of Education, Ehime University, Matsuyama, Japan
4Cyclotron Center, Iwate Medical University, Takizawa-mura, Japan

Tóm tắt

AbstractPhytoremediation is an environmental remediation technique that takes advantage of plant physiology and metabolism. The unique property of heavy metal hyperaccumulation by the macrophyte Eleocharis acicularis is of great significance in the phytoremediation of water and sediments contaminated by heavy metals at mine sites. In this study, a field cultivation experiment was performed to examine the applicability of E. acicularis to the remediation of water contaminated by heavy metals. The highest concentrations of heavy metals in the shoots of E. acicularis were 20 200 mg Cu/kg, 14 200 mg Zn/kg, 1740 mg As/kg, 894 mg Pb/kg, and 239 mg Cd/kg. The concentrations of Cu, Zn, As, Cd, and Pb in the shoots correlate with their concentrations in the soil in a log‐linear fashion. The bioconcentration factor for these elements decreases log‐linearly with increasing concentration in the soil. The results indicate the ability of E. acicularis to hyperaccumulate Cu, Zn, As, and Cd under natural conditions, making it a good candidate species for the phytoremediation of water contaminated by heavy metals.

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Wiley

Tập 39 Số 8

735-741

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