Evaluation of estimated daily intake (EDI) of cadmium and lead for rice (Oryza sativa L.) in calcareous soils

Journal of Environmental Health Science Engineering

Alireza Jahangiri²  Abdolamir Moezzi¹  Gholamabbas Sayyad¹  Ali Chamannejadian¹ 

[1] Department of Soil Science, College of Agriculture, Shahid Chamran University of Ahvaz, Ahvaz, Khuzestan province, Iran;Nanotechnology Research Center and Department of Medicinal Chemistry, School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran

关键词: Calcareous soils;    Rice;    EDI;    Lead;    Cadmium;   

Others  :  820812
DOI  :  10.1186/1735-2746-10-28

 received in 2012-09-04, accepted in 2013-03-03,  发布年份 2013

【 摘 要 】

The excessive amounts of cadmium and lead in food chain can cause health problems for humans and ecosystem. Rice is an important food in human diet. Therefore this study was conducted in order to investigate cadmium and Lead concentrations in seed rice (Oryza saliva) of paddy fields in southwest of Iran. A total of 70 rice seed samples were collected from paddy fields in five regions of Khuzestan province, Southwest Iran, during harvesting time. In the samples cadmium and Lead concentrations were measured. To assess the daily intake of Cadmium and Lead by rice, daily consumption of rice was calculated. The results showed that average concentrations of Cadmium and Lead in rice seeds were 273.6 and 121.8 μg/kg, respectively. Less than 72% of rice seed samples had Cadmium concentrations above 200 μg/kg (i.e. Guide value for cadmium); and less than 3% had Lead concentrations above 150 μg/kg (i.e. Guide value for Lead). The estimated daily intakes of cadmium by the local population was calculated to 0.59 μg/day kg bw, which corresponds to 59% of the tolerable daily intakes (i.e. 1 μg/day kg bw). Eleven out of 70 samples (15.71%) exceed the tolerable daily intakes. The dietary intakes for Lead in the local population ranged from 0.22 to 0.47 μg/day kg bw. Tolerable daily intakes for Lead is 3.6 μg/day kg bw. As a whole, long term consumption of the local rice may bear high risk of heavy metal exposure to the consumer in the study region.

【 授权许可】

   
2013 Chamannejadian et al.; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

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