Health Risk Assessment and Levels of Heavy Metals in Farmed Nile Tilapia (Oreochromis niloticus) from the Volta Basin of Ghana

Table 5

Estimates of average daily dose (mg/kg/day) of heavy metals in tilapia for children and adults for noncarcinogenic risk.

	Fish farm A		Fish farm B		Fish farm C		Control
Metal	Children	Adults	Children	Adults	Children	Adults	Children	Adults
Zn	2.76E − 05	2.96E − 06	2.84E − 05	3.05E − 06	2.43E − 05	2.60E − 06	1.29E − 05	1.39E − 06
Fe	7.72E − 09	5.33E − 05	6.68E − 04	7.17E − 05	5.27E − 04	5.66E − 05	1.48E − 04	1.58E − 05
Mn	4.55E − 05	4.88E − 06	2.34E − 05	2.52E − 06	3.28E − 05	3.52E − 06	1.03E − 05	1.10E − 06
Ni	2.16E − 05	2.32E − 06	3.65E − 05	3.92E − 06	2.67E − 05	2.86E − 06	8.67E − 06	9.29E − 07
Cr	4.13E − 06	4.43E − 07	—	—	4.39E − 06	4.72E − 07	1.33E − 06	1.43E − 07
As	—	—	—	—	—	—	3.07E − 06	3.29E − 07