Phalaris aquatica and Trifolium subterraneum grown on a tailings-storage facility(control) and tailings-storage treated with either topsoil or biosolids in a gold'copper mine were analysed for Al, Cu, Fe, and Mo contents. Soil samples fromthe treatments were also tested for these metals and soil properties. Resultsindicated that higher levels of metals occurred in T. subterraneum than inP. aquatica; metal contents in both taxa were significantly greater in the control,and higher metal contents occurred in plants tested in May 2008 (autumn)compared with October 2008 (spring). A strong relationship existed between Cu,Fe, and Mo contents in T. subterraneum and Al content in the tested soils. Asignificant relationship was also observed between Al content in T. subterraneumand K, Na, and SO4 levels in the soils. We recommend that tailings soil beamended with either topsoil or biosolids before grazing livestock to reduce therisk of either mineral deficiencies or toxicities.
|Number of pages||11|
|Journal||International Journal of Mining, Reclamation and Environment|
|Publication status||Published - Sep 2010|