Field evaluation of Cd and Zn phytoextraction potential by the hyperaccumulators Thlaspi caerulescens and Arabidopsis halleri
, Lombi, E., Gray, C. W., Caille, N., Dunham, Sarah and Zhao, Fangjie
(2006)
Field evaluation of Cd and Zn phytoextraction potential by the hyperaccumulators Thlaspi caerulescens and Arabidopsis halleri.
Environmental Pollution, 141 (1).
pp. 115-125.
10.1016/j.envpol.2005.08.022
Field trials were undertaken to investigate the effect of the application of metal mobilizing agents, different sowing strategies and length ofgrowing season on the extraction of Cd and Zn from soils byThlaspi caerulescensandArabidopsis halleri. None of the mobilizing agents usedenhanced metal accumulation byT. caerulescens. Between 1998 and 2000, on average across plots where Cd or Zn exceeded allowable limits,T. caerulescensremoved 1.3 and 0.3% of the total soil Cd and Zn. In one season whenT. caerulescenswas grown for 14 months, 21.7 and 4.4%of the total soil Cd and Zn was removed. This was larger than values found whenT. caerulescenswas grown for 4 months.A. halleriaccumu-lated similar concentrations of Zn, but lower Cd concentrations thanT.caerulescens. The results indicate that metal phytoextraction usingT. caerulescenscan be used to clean up soils moderately contaminated by Cd.
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