the influence of different growth stages and dosage of edta on cd uptake and accumulation in cd.pdf

Bull Environ Contam Toxicol (2009) 82:348–353 DOI 10.1007/s00128-008-9592-5 The Influence of Different Growth Stages and Dosage of EDTA on Cd Uptake and Accumulation in Cd-Hyperaccumulator (Solanum Nigrum L.) Yuebing Sun Æ Qixing Zhou Æ Lin Wang Æ Weitao Liu Received: 22 December 2007 / Accepted: 9 October 2008 / Published online: 11 November 2008 Springer Science+Business Media, LLC 2008 Abstract Application of synthetic chelates such as eth- Keywords Solanum nigrum L Cd-hyperaccumulator ylene diamine tetraacetic acid (EDTA) has been proposed EDTA Phytoremediation as an alternative technology for phytoextraction of con- taminated soils. In a pot experiment, the effects of EDTA application at three growing stages on growth and Cd uptake and accumulation of Solanum nigrum L. were Cadmium (Cd) is a major anthropogenic pollutant which investigated. The results showed that the 0.1 g/kg EDTA has been released into the environmental since the indus- treatment was the most effective treatment, in which the trial revolution (Zhou and Huang 2000), the primary concentrations of Cd in stems and leaves increased sig- sources of this pollutant are agricultural and industrial nificantly compared with the control (Cd only), and the practices such as application of pesticides and fertilizers, accumulation of Cd in shoots increased by 51.6%, 61.1% waste water irrigation, and smelter wastes and residues and 35.9% at the seedling, flowering and mature stages, from the mining and smelting of metalliferous ores respectively. Moreover, at the flowering stage, the height, (McGrath et al. 2001; Boisson et al. 1999; Zhou and Huang dry shoot biomass and Cd accumulation in the plants 2000). Scie