Influence of amendments and aided phytostabilization on metal availability and mobility in Pb/Zn mine tailings
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Miscanthus sinensis is a species of flowering plant in the grass family Poaceae, native to eastern Asia throughout most of China, Japan, Taiwan and Korea. It is an herbaceous perennial grass, growing to 0.8–2 m (3–7 ft) tall, rarely 4 m (13 ft), forming dense clumps from an underground rhizome. The leaves are 18–75 cm (7–30 in) tall and 0.3–2 cm broad.
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J Environ Manage. 2014 Jun 15;139:15-21. doi: 10.1016/j.jenvman.2014.02.019. Epub 2014 Mar 27.
Influence of amendments and aided phytostabilization on metal availability and mobility in Pb/Zn mine tailings.
Lee SH1, Ji W2, Lee WS3, Koo N4, Koh IH5, Kim MS6, Park JS5.
- 1Soil Remediation Team, Mine Reclamation Corporation, Seoul 110-727, Republic of Korea. Electronic address: email@example.com.
- 2Soil Remediation Team, Mine Reclamation Corporation, Seoul 110-727, Republic of Korea.
- 3National Institute of Environmental Research, Incheon 404-708, Republic of Korea.
- 4Department of Forest Conservation, Korea Forest Research Institute, 57 Hoegiro, Dongdaemun-gu, Seoul, Republic of Korea.
- 5Research Institute for Environmental Technology & Sustainable Development, Environmental Analysis Center, Korea University, Seoul, Republic of Korea.
- 6Division of Environmental Science and Ecological Engineering, Korea University, Seoul 136-713, Republic of Korea.
A greenhouse experiment was conducted to evaluate the effect of four different amendments:
- bone mill,
- bottom ash,
- furnace slag, and
- red mud,
as immobilizing agents and the plant species Miscanthus sinensis and Pteridium aquilinum in aided phytostabilization of Pb/Zn mine tailings.
The effects of amendments and plants on the availability and mobility of heavy metals were evaluated using single extraction, sequential extraction, pore-water analysis, and determination of heavy metal concentrations in plants.
The application of Fe-rich amendments significantly reduced the amount of soluble and extractable heavy metals in the tailings (p < 0.05).
- Furnace slag and M. sinensis reduced CaCl2-extractable heavy metals by 56-91%,
- red mud and P. aquilinum treatment was the most effective at decreasing bioaccessible Pb, reducing it to 34% of the total Pb.
Compared to control, water soluble Cd, Cu, Pb, and Zn were reduced by 99, 99, 98, and 99%, respectively, in the red mud and P. aquilinum tailings.
M. sinensis accumulated heavy metals mainly in the root, and had lower translocation factors compared with P. aquilinum.
The results of this study suggest that M. sinensis can be used in aided phytostabilization for these types of mine tailings and Fe-rich amendments are effective for the in situ immobilization of metals.
Copyright © 2014 Elsevier Ltd. All rights reserved.
Amendments; Availability; Mine tailings; Mobility; Phytostabilization
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