Risk assessment and hotspots identification of heavy metals in rice: A case study in Longyan of Fujian province, China
| Autor: | Xinyu Zheng, Qingtie Xiao, Ruiyu Lin, Huanhuan Wen, Qixin Lü, Yujie Wang, Bolun Han |
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| Rok vydání: | 2021 |
| Předmět: |
Adult
Pollution China Environmental Engineering Environmental remediation Health Toxicology and Mutagenesis media_common.quotation_subject 0208 environmental biotechnology Rice intake 02 engineering and technology 010501 environmental sciences Risk Assessment 01 natural sciences Toxicology Soil Metals Heavy Humans Soil Pollutants Environmental Chemistry Health risk Child 0105 earth and related environmental sciences media_common Public Health Environmental and Occupational Health Oryza Heavy metals General Medicine General Chemistry Hazard quotient 020801 environmental engineering Environmental science Risk assessment Environmental Monitoring |
| Zdroj: | Chemosphere. 270:128626 |
| ISSN: | 0045-6535 |
| Popis: | The potential threats of heavy metals in rice have attracted increasing attention worldwide. In this study, we assessed the pollution status and health risk of rice collected from Longyan in Fujian, China. Meanwhile, we explored the spatial pattern and hotspots of those metals. The results showed that the average concentrations of Cd, Hg, As, Pb, Cr, Ni, Cu, and Zn in rice were 0.064, 0.002, 0.464, 0.072, 0.138, 0.106, 10.819, and 23.788 mg kg−1, respectively. Among them, As and Cu remarkably accumulated with the exceeding ratio of 50.30% and 55.12%, respectively. Furthermore, the values of the target hazard quotient in rice ranked as As > Cu > Zn > Cd > Pd > Ni > Hg > Cr, which As and Cu was greater than 1.0. And the carcinogenic risk values were in the order of As > Cd > Ni > Cr, which all exceeded the tolerance level (1 × 10−4). Risk assessment indicated that both children and adults were posed the non-carcinogenic and carcinogenic risk from rice intake, and As had the largest contribution rate for them. Comparison found that the spatial patterns of heavy metals distribution were consistent with the hotspots. The hotspots for As and Zn located in the western part (Changting and Wuping), Cd and Cu in the eastern part (Xinluo and Yongding), Cr and Ni were simultaneously found in the northeast (Zhangping), while Hg and Pb were mainly located in the central region (Shanghang). Overall, combining the pollution status, risk assessment, and hotspot distribution in rice, the western region (Changting and Wuping) were identified as priority areas for remediation. |
| Databáze: | OpenAIRE |
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