Levels and Health Risk Assessment of Heavy Metals in Soil, Water, and Vegetables of Dar es Salaam, Tanzania

Table 3

Percentage of moisture content and mean (± standard deviation) of heavy metal levels (mg/100 g) in the four vegetables ( = 6).

Scientific name	% of moisture content	Pb	Zn	Cu	Fe
I. batatas	78.59	2.46 (0.36)	8.84 (1.21)	1.04 (0.16)	13.64 (1.92)
A. hybridus	86.96	1.39 (0.06)	5.76 (0.26)	0.98 (0.02)	10.61 (0.40)
A. esculentus	87.85	0.33 (0.08)	2.64 (0.17)	0.68 (0.01)	4.84 (0.37)
S. melongena	91.04	0.32 (0.05)	10.29 (0.64)	0.55 (0.10)	5.65 (0.44)
FAO/WHO		0.03	6.0	4.0	42.5

Different letters down columns within the same heavy metal represent significant differences at ; FAO/WHO maximum permissible limits [35, 36].