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Mangrove sediments were sampled form 14 main mangrove reserves of China. Concentrations of Cu, Pb, Zn, Cr and Cd were analyzed with a PE ICP-MS, and physical and physicochemical factors such as particle size distribution, pH, salinity and Total Organic Matter (TOM) were also determined. In the mangrove sediments of China, the average contents of heavy metals decreased in the order of Zn > Pb > Cu > Cr > Cd. The average contents of heavy metals were: Cu = 22.8 ± 16.46 mg/kg, Pb = 76.1 ± 52.33 mg/kg, Zn = 86.3 ± 42.65 mg/kg, Cr = 18.4 ± 5.83 mg/kg and Cd = 0.21 ± 0.25 mg/kg. Compared with previous studies, levels of heavy metals increased greatly.

Concentrations of Cu, Pb, Zn, Cr and Cd in Surficial Sediments from Mangrove Wetlands of China