Trace Metal Contamination Characteristics and Health Risks Assessment of Commelina africana L. and Psammitic Sandflats in the Niger Delta, Nigeria

Table 3

Pollution indicators for trace metals in sandflats from Douglas Creek.

Pollution indices		Sample sites
		DC-V	DC-W	DC-X	DC-Y	DC-Z
Cf	Zn	0.77	0.78	0.82	0.80	0.75
	Pb	0.001	0.001	0.001	0.001	0.001
	Cd	2.34	2.33	2.31	2.67	3.00
	Ni	0.03	0.03	0.04	0.03	0.04
	Cr	0.09	0.08	0.07	0.09	0.07
	Zn	0.512	0.520	0.546	0.535	0.508
	Pb	0.001	0.001	0.001	0.001	0.001
	Cd	1.558	1.556	1.544	1.778	2.000
	Ni	0.017	0.021	0.025	0.023	0.025
	Cr	0.059	0.059	0.051	0.060	0.045
Cd		3.219	3.234	3.251	3.595	3.859
mCD		0.644	0.647	0.650	0.719	0.772