Spatial Variations and Potential Risks of Heavy Metals in Seawater, Sediments, and Living Organisms in Jiuzhen Bay, China

Table 3

Heavy metal contents in seawater layers of Jiuzhen Bay (μg/L).

Heavy metal type	Total average value (range)	Average value at the surface layer (range)	Average value at the bottom layer (range)
Cu	4.82 (3.37∼6.33)	4.74 (3.37∼5.88)	4.94 (4.05∼6.33)
Zn	22.0 (8.9∼123)	16.7 (11.5∼29.2)	30.1 (8.9∼123)
As	27.0 (20.3∼31.5)	26.3 (20.3∼29.8)	27.9 (25.0∼31.5)
Cd	0.34 (0.24∼0.50)	0.34 (0.24∼0.50)	0.32 (0.29∼0.35)
Hg	0.46 (0.26∼0.72)	0.44 (0.26∼0.72)	0.50 (0.39∼0.67)
Pb	0.37 (0.25∼0.54)	0.37 (0.25∼0.45)	0.36 (0.25∼0.54)