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

Table 4

Soil-vegetable transfer coefficients (%) of heavy metals.

Scientific name	Pb	Zn	Cu	Fe	Efficacy
I. batatas	1.08	2.88	5.82	0.49	2.57
A. hybridus	0.61	1.87	5.48	0.38	2.09
A. esculentus	0.15	0.86	3.84	0.17	1.26
S. melongena	0.14	3.35	3.07	0.20	1.69
Average	0.50	2.24	4.55	0.31