(RfD) (mg/ Kg/ day) for elements reported in literature:

Fe (0.700 ), Mn (0.014), Zn (0.300), Cu( 0.040), Ni (0.020) ,

Cd( 0.001), Pb (0.0035).

 Find attached Table:6 of the following reference

Chemistry Central Journal

December 2011, 5:64

Heavy metals health risk assessment for population via consumption of vegetables grown in old mining area; a case study: Banat County, Romania

·                            Monica Harmanescu, Liana Maria Alda, Despina Maria Bordean, Ioan Gogoasa,Iosif Gergen

Many thanks Manohar,,that was really useful

Marwa

No problem!

Here is the reference dose for iron = 9.00E−03

Please see Table 6.9 which is entitled "Chemical reference doses and slope factors."

You can get this Table from the following reference:

 http://web.ornl.gov/sci/env_rpt/aser95/tb-6-9.pdf

Hope this helps answer your question.

Professor Yehia Khalil

Yale University

USA

Thanks a lot pro. Yehia. It really helped.

Now,, I have one more question in regard to the slope factor? why there is no SF value for the same heavy metals provided in the table despite their cancer risk evidence?

I searched the IRIS website and couldn't find any?

Many thanks again.

Because some elements are not classified as cercinogenic.