Fluoride levels in Soil and Crops of Tomato and Onion Farms of Zanjan
2016
Hassan Hassanzadazar (Department of Food Safety and Hygiene, School of Public Health, Zanjan University of Medical Sciences, Zanjan, Iran) | Mohammad Reza Mehrasbi (Department of Environmental Health Engineering, School of Public Health, Zanjan University of Medical Sciences, Zanjan ,Iran.) | Khalilollah Moeinian (Department of Environmental Health Environmental Health Engineering, School of Public Health, Semnan University of Medical Sciences, Semnan, Iran.) | Elaheh Rabiei (Department of Public Health Food Safety Health, Zanjan University of Medical Sciences, Iran.) | Koorosh Kamali (Department of Public Health, School of Public Health, Zanjan University of Medical Sciences, Zanjan, Iran.)
Background; Fluoride is an essential nutrient for the human body. The major routes of fluoride intake include food and drinking water, though the absorption of fluoride from food is much easier. The aim of this study was to evaluate the amount of fluoride in the soil and tomato and onion crops on farms of Zanjan.Methods; Three farms of each crop (tomato and onion) were selected randomly. Each farm was divided into 10 sections, and one sample of soil and crop of each section was taken which means 120 samples in total. Fluoride concentrations in the soil and crops were measured using the Ion Selective Electrode (ISE) and repeated 3 times.Results; The mean concentration of fluoride in soil samples from studied farms in Zanjan was 0.83 ± 0.17 mg/kg. The mean concentrations of fluoride in tomatoes and onions of Zanjan were observed 2.10 ± 0.80 and 2.23 ± 0.64 mg/kg, respectively.Conclusion;There was no significant difference between fluoride concentration in tomatoes and onions, although there was a significant difference between the amount of fluoride in the soils of studied farms (Pv < 0.024). No significant correlation was observed between the fluoride levels of soils and the fluoride levels of tomatoes (R2 = 0.126) and onions (R2 = 0.008).
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