Environmental Systems Research

Table 5 Transfer factor and pollution indices from the agricultural farm across the study sites

From: Appraisal of lead (Pb) contamination and potential exposure risk associated with agricultural soils and some cultivated plants in gold mines

Sites/Subsites	Samples		Soil
Sites/Subsites	BCF		Depth(cm)	Indexes
Abare	Spinach	Maize	Depth(cm)	SPI	NCPI
1	0.03	0.01	0–20	0.91
2	0.03	0.01	21–40	0.45
3	0.02	0.01	61–60	0.34
4	0.02	0.01			0.52
Bagega
1	0.05	0.03	0–20	0.18
2	0.04	0.04	21–40	0.15
3	0.04	0.03	61–60	0.11
4	0.04	0.03			0.36
Dareta
1	0.03	0.07	0–20	0.06
2	0.01	0.01	21–40	0.05
3	0.01	0.02	61–60	0.04
4	0.02	0.02			0.27

SPI-Single pollution index, NCPI-Nemerow composite pollution index; data are mean ± SD (n = 3); SPI and NCPI < 1 = Safe, SPI and NCPI > 1 = Pollution critical limit thus, unsafe; BCF = Transfer factor

Back to article page