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A selective sequential extraction method developed by Tessier et al was used to study the speciation of heavy metal elements, Cr, Cu, Zn, and Pb, in soils taken from six different functional areas in Urumqi. The results showed that the contents of Pb, Zn, Cr, and Cu were significantly above their average background values, as high as 3.6 times, 2.3 times, 2.1 times, and 1.9 times, respectively. In...
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