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Table 2 Table showing reference oral dose for metals

From: Heavy metals in vegetables: screening health risks involved in cultivation along wastewater drain and irrigating with wastewater

S. no.

Metal

Reference oral dose (mg/kg/day)

Reference

1.

Cadmium

0.001

US EPA (2015)

2.

Copper

0.04

US EPA (2015)

3.

Cobalt

0.043

Food and Nutrition Board (2004)

4.

Lead

0.004

US EPA (1997)

5.

Iron

0.7

US EPA (2015)