Heavy Metals Content in Several Imported Rice Crops (Oryza sativa) from the Local Markets


Abstract- Rice crop may be subjected to several heavy metals contaminationdue to various causes such as contaminated irrigating water, fertilizerscontaining certain heavy metals and other agricultural applications. This workwas designed to examine several heavy metals (Lead, Chromium, Arsenic andCopper) in rice crop imported from India, USA, Brazil, Thailand, Paraguayand Uruguay in addition to locally cultivated rice. Rice samples werecollected from local markets and subjected to the examination of above heavymetal content using acidic digestive method and heavy metal ions weredetermined by Atomic Absorption Spectrophotometer. It has been found thatthese examined rice crops have shown significant variations in terms of heavymetal content and importing countries where in case of Lead ion, Iraqi ricehad the highest mean (19.27 ± 0.25 mg/kg ) content while India 1 showed thelowest (9.51 ± 0.08 mg/kg) mean value. For rice Chromium content, it wasfound that USA rice gave the highest (4.02 ± 0.51 mg/kg) mean value and thelowest mean content (0.15 ± 0.02 mg/kg) was detected in the Iraqi rice.Regarding rice Arsenic content, all examined rice crops had As contentvarying from minimum mean value of 0.2 ± 0.012 mg/kg in India2 to amaximum value of 0.37 ± 0.021 mg/kg in India1. For Copper rice content, thisstudy has found the Iraqi crop had the highest (4.50 ± 0.07 mg/kg) mean valuewhile Thailand gave the lowest mean value of 2.66 ± 0.25 mg/kg