The Concentration of Heavy Metals Zn, Pb and Cd in Rice Supplied in the Consumer Market in Hamadan

Considering the significance of the issue, this research was performed to study the elements of Zn, Pb and Cd in the rice products available in the markets of Hamedan in 1394.

Accordingly, ten types of that rice were sampled through a standard method. After passing the preparation stages of the samples by acidic digestion method, the concentration of elements was read in Atomic Emission Device. Spss was applied to process the statistical data.

The results indicated that the minimum and maximum average of element concentration in rice samples (according to mlg/kg) were as the following: for Zink with 0.0862±0.0002 and 1.02±0.00781 in B rice and C respectively, for Lead with 0.226±0.00529 and 4.894±0.00529 in A and H rice, and for Cadmium with 0.006±0.001 and 0.043±0.00436 in H and A. The results also showed meaningful, statistical deviation of accumulated concentration average of heavy metals in rice samples available in the markets of Hamedan through WHO. Concentration averages of Zinc and Cadmium are less while concentration average of Lead is more than permissible level.

Finally, it can be stated that the rice product which is being consumed in Hamedan is exposed to Lead pollution which is more than permissible level and it can cause psychological and behavioral problems and health consequences which cannot be compensated.