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

Table 12

Values of the pollution index (P_i) and comprehensive pollution index (P_ij) for single-factor heavy metal pollution in various living organisms.

Living organism	PCu	PZn	PAs	PCd	PHg	PPb	AvePi	Pij
Oyster	7.32	11.70	3.14	3.74	0.50	3.61	5.00	9.00
Clam	0.15	0.54	2.41	0.16	0.16	1.89	0.88	1.82
Fish	0.01	0.14	0.48	—	0.14	0.05	0.14	0.35
Shrimp	0.08	0.17	0.15	—	0.08	0.03	0.08	0.13
Average value	1.89	3.14	1.54	0.97	0.22	1.40	1.53	2.82