The high levels of heavy metal accumulation in cultivated rice from the Tajan river basin: Health and ecological risk assessment
| Autor: | Zarrin Es’haghi, Amir Mohammad Malvandi, Nahid Vatanpour, Laura Scesi, Hossein Hedayati Talouki, Javad Feizy |
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| Rok vydání: | 2019 |
| Předmět: |
Crops
Agricultural China Environmental Engineering Health Toxicology and Mutagenesis 0208 environmental biotechnology Population Drainage basin 02 engineering and technology 010501 environmental sciences Iran 01 natural sciences Risk Assessment Metal Toxicology Dietary Exposure Rivers Risk Factors Metals Heavy Environmental Chemistry Humans Soil Pollutants education 0105 earth and related environmental sciences education.field_of_study geography geography.geographical_feature_category Ecology Transfer factor Public Health Environmental and Occupational Health Heavy metals Oryza General Medicine General Chemistry Contamination Pollution Hazard quotient 020801 environmental engineering visual_art visual_art.visual_art_medium Environmental science Surface water Environmental Monitoring |
| Zdroj: | Chemosphere. 245 |
| ISSN: | 1879-1298 |
| Popis: | Consumption of food crops contaminated with heavy metals (HMs) is a significant risk factor for human health and safety. We evaluated the health risks of HMs in contaminated food crops irrigated with surface water. Results showed there is a substantial buildup of HMs in rice, collected from the Tajan river basin, Iran. The transfer factor (TF) value for toxic elements Cd (3.6-12.4) and Pb (4.9-23.6) were significantly high and exceeded the permissible limits for crops set by WHO. The principal component analysis was used to analyze the relevance of different metals and identify the primary sources. The results showed that two factors dominated the metals variability (94.10% of total variance) that Cr, Fe, Cd, and Pb were dominated by PC1 whereas another factor charged Zn and Cu. The average total hazard quotient (THQ) values for Pb, Fe, Cr, and Cd were 13.8, 7.7, 5.5, and 1.5, respectively, that suggest a considerable risk to the health of regular rice consumers. The high hazard index (HI) value (29.2) demonstrated that the exposure concentration was very high compared to the effective threshold, and it may have potentially harmful implications for human health. To sum up, these results proved that rice from this basin could be a serious dietary source of Pb and Cd exposure to the consumer population. |
| Databáze: | OpenAIRE |
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