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Tree species affect soil metal redistribution: implications for phytoremediation

Lotte Van Nevel (UGent) , Jan Mertens (UGent) , Filip Tack (UGent) and Kris Verheyen (UGent)
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Abstract
Phytostabilization is a promising technique, aiming at reducing metal mobility and thus metal dispersion in the ecosystem. Tree species effects on metal redistribution were investigated on 2 metal polluted sites, differing in soil characteristics as well as pollution source and forest age. On the one hand we investigated the redistribution of soil metals under 4 tree species on a dredged sediment disposal site with 33-year-old trees (poplar, oak, ash and maple). On the other hand we investigated the effects of 6 different tree species on Cd and Zn compartmentalization after 10 years of tree growth on a sandy soil near a former zinc smelter (aspen, oak, silver birch, black locust, Scots pine and Douglas fir). The contrasting soil characteristics of the 2 sites might give rise to other dynamics in metal fluxes. The dredged sediment site had a high pH (~ 7.7) and a high CEC, while the sandy site had a low pH (~ 4.7) and a typical low CEC. Both studies revealed a clear metal redistribution in the soil profile, dependent on the tree species. These redistributions were more pronounced on the oldest site. Poplar and aspen took up high amounts of Cd and Zn and this was associated with increased Cd and Zn concentrations in the topsoil. Silver birch took up Zn in its leaves, which was reflected in a slight accumulation of Zn in the topsoil. The other tree species contained normal metal concentrations in their tissues and caused no metal accumulation in the topsoil. Oak acidified the soil more than the other species and caused a decrease in the concentration of metals in the topsoil. Hence, in order to minimize the risk of metal dispersion in the ecosystem, poplar and aspen should be excluded in further afforestations and the acidifying species should be mixed with other species.

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MLA
Van Nevel, Lotte, et al. “Tree Species Affect Soil Metal Redistribution: Implications for Phytoremediation.” SETAC Europe 20th Annual Meeting : Abstract Book, 2010.
APA
Van Nevel, L., Mertens, J., Tack, F., & Verheyen, K. (2010). Tree species affect soil metal redistribution: implications for phytoremediation. SETAC Europe 20th Annual Meeting : Abstract Book. Presented at the SETAC Europe 20th annual meeting : Science and Technology for Environmental Protection, Sevilla, Spain.
Chicago author-date
Van Nevel, Lotte, Jan Mertens, Filip Tack, and Kris Verheyen. 2010. “Tree Species Affect Soil Metal Redistribution: Implications for Phytoremediation.” In SETAC Europe 20th Annual Meeting : Abstract Book.
Chicago author-date (all authors)
Van Nevel, Lotte, Jan Mertens, Filip Tack, and Kris Verheyen. 2010. “Tree Species Affect Soil Metal Redistribution: Implications for Phytoremediation.” In SETAC Europe 20th Annual Meeting : Abstract Book.
Vancouver
1.
Van Nevel L, Mertens J, Tack F, Verheyen K. Tree species affect soil metal redistribution: implications for phytoremediation. In: SETAC Europe 20th annual meeting : abstract book. 2010.
IEEE
[1]
L. Van Nevel, J. Mertens, F. Tack, and K. Verheyen, “Tree species affect soil metal redistribution: implications for phytoremediation,” in SETAC Europe 20th annual meeting : abstract book, Sevilla, Spain, 2010.
@inproceedings{1889519,
  abstract     = {{Phytostabilization is a promising technique, aiming at reducing metal mobility and thus metal dispersion in the ecosystem. Tree species effects on metal redistribution were investigated on 2 metal polluted sites, differing in soil characteristics as well as pollution source and forest age. On the one hand we investigated the redistribution of soil metals under 4 tree species on a dredged sediment disposal site with 33-year-old trees (poplar, oak, ash and maple). On the other hand we investigated the effects of 6 different tree species on Cd and Zn compartmentalization after 10 years of tree growth on a sandy soil near a former zinc smelter (aspen, oak, silver birch, black locust, Scots pine and Douglas fir). The contrasting soil characteristics of the 2 sites might give rise to other dynamics in metal fluxes. The dredged sediment site had a high pH (~ 7.7) and a high CEC, while the sandy site had a low pH (~ 4.7) and a typical low CEC. Both studies revealed a clear metal redistribution in the soil profile, dependent on the tree species. These redistributions were more pronounced on the oldest site. Poplar and aspen took up high amounts of Cd and Zn and this was associated with increased Cd and Zn concentrations in the topsoil. Silver birch took up Zn in its leaves, which was reflected in a slight accumulation of Zn in the topsoil. The other tree species contained normal metal concentrations in their tissues and caused no metal accumulation in the topsoil. Oak acidified the soil more than the other species and caused a decrease in the concentration of metals in the topsoil. Hence, in order to minimize the risk of metal dispersion in the ecosystem, poplar and aspen should be excluded in further afforestations and the acidifying species should be mixed with other species.}},
  author       = {{Van Nevel, Lotte and Mertens, Jan and Tack, Filip and Verheyen, Kris}},
  booktitle    = {{SETAC Europe 20th annual meeting : abstract book}},
  language     = {{eng}},
  location     = {{Sevilla, Spain}},
  title        = {{Tree species affect soil metal redistribution: implications for phytoremediation}},
  year         = {{2010}},
}