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

Table 2

Summary statistics of trace metal concentrations (mg/kg) in sandflats and Commelina africana L. from the sandy beaches of Douglas Creek.

Trace metals		Min.	Max.	Mean	Std. deviation	CV%
Soil	Zn	71.43	77.850	74.51	2.553	3.42
	Pb	0.019	0.030	0.024	0.004	16.67
	Cd	0.695	0.900	0.759	0.090	11.84
	Ni	1.750	2.600	2.278	0.346	14.91
	Cr	6.100	8.120	7.392	0.875	11.77
C. africana L.	Zn	225.90	252.2	239.26	11.801	4.93
	Pb	0.050	0.080	0.058	0.013	22.41
	Cd	0.150	0.750	0.304	0.250	82.24
	Ni	10.65	26.750	19.152	7.289	38.07
	Cr	7.879	13.824	9.642	2.383	24.69