نوع مقاله : مقاله پژوهشی
نویسندگان
بخش تحقیقات خاک و آب، مرکز تحقیقات و آموزش کشاورزی و منابع طبیعی استان اصفهان، سازمان تحقیقات، آموزش و ترویج کشاورزی، اصفهان، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Important environmental and health problems can be caused by heavy metals. Contamination of rice with cadmium is a serious risk for the quality and safety of this product. The objective of this study was to investigate the possibility of soil and rice grain contamination of some paddy fields of Isfahan Provence with heavy metals. A number of 105 soil samples were collected from 6 rice growing areas and the concentration of zinc, copper, iron, cadmium, and lead was measured. Contamination factor (CF) was used to determine soil contamination with heavy metals. Cadmium concentration was measured in the root, stem and grain of rice. The indices of hazard coefficient (HQ), bioaccumulation factor (BAF), and translocation factor (TF) of cadmium were calculated. The concentration of copper, zinc, and lead in the studied stations was lower than the permissible limit provided by the Iranian Environmental Organization for agricultural soils while the concentration of cadmium was higher than the permissible limit in about 21% of the studied samples. The trend of CF-Cd>CF-Fe>CF-Pb>CF-Cu>CF-Zn was observed. The rice grain cadmium concentration was lower than the national standard number 12968 in 36.4% of the samples. The value of HQ for adults and children was less than the permissible limit (HQ=1) in 54.5% and 18.2% of the studied samples, respectively. The average BAF was calculated as 0.03. According to the results, cadmium does not accumulate in the rice grain, but, it can threaten the health of both groups of adults and especially children in the near future.
کلیدواژهها [English]
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