Applied and Environmental Soil Science / 2016 / Article / Tab 6

Research Article

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

Table 6

PCA factor loadings of the concentrations of trace metals for sandflat soil and C. africana L. samples.

Factor components
123

SandflatZn−0.4770.8300.207
Pb0.880−0.2230.212
Cd0.923−0.1070.308
Ni0.6630.7240.038
Cr0.837−0.2510.475
Eigenvalue2.9941.3380.410
Variability (%)59.87926.7558.207
Cumulative %59.87986.63494.841

C. africana L.Zn0.833−0.4700.037
Pb0.8490.516−0.021
Cd−0.6900.3040.637
Ni−0.7240.430−0.500
Cr0.7910.6000.083
Eigenvalue3.0421.1240.664
Variability (%)60.83822.48313.285
Cumulative %60.83883.32196.606

High factor loadings for each principle component are highlighted with bold type.

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