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Concentrations of selected heavy metals (Cr, Cu, Zn, As, Cd, Hg and Pb) in surface sediments from 18 sites were examined in Zhangjiang Estuary Mangrove National Natural Reserve (ZEMNNR), which is the largest natural mangrove forest north of the Tropic of Cancer in China. The ranges of heavy metals expressed in mug/g sediment dry weight were as follows: Cr (48.14 to 110.01), Cu (18.15 to 43.18), Zn...
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