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| Effects of changes in rice-and vegetable-based dietary structure on health risk from cadmium intake for rural residents: A case study of Doumen District, Zhuhai City, China |
| Received:January 28, 2019 |
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| KeyWord:dietary structure;health risk;cadmium;rural areas;rice;vegetables |
| Author Name | Affiliation | E-mail | | TONG Gui-jie | School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China | | | CHEN Dong-xiang | Dongfang College, Zhejiang University of Finance & Economics, Haining 314408, China | | | WU Shao-hua | Institute of Land and Urban-rural Development, Zhejiang University of Finance & Economics, Hangzhou 310018, China | shaohua@zufe.edu.cn | | YAN Dao-hao | School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China | | | YUAN Yu-jie | School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China | | | LI Fu-fu | School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China | | | WANG Yuan-min | School of Geographic and Oceanographic Sciences, Nanjing University, Nanjing 210023, China | |
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| Abstract: |
| To identify the effects of changes in the dietary structure (rice and vegetables) on the health risk from cadmium (Cd) intake for rural residents, the Doumen District of Zhuhai City was selected as the study area. The existing situation with respect to Cd pollution in rice and vegetables in the study area was analyzed, the trend of Cd content and dietary structure changes since 2000 were determined, and the target hazard coefficient (THQ) method was used to evaluate the health risk from Cd intake for rural residents in the study area. The results showed that the risk from Cd pollution in rice was higher than that for vegetables; a few rice samples exceeded the standard while no vegetables did. From 2000 to 2017, the Cd content in rice grains fluctuated around 0.1 mg·kg-1 and decreased gradually in the edible parts of vegetables. In the dietary structure, the proportion of rice decreased by 8.7% and annual consumption decreased by 27%, while the proportion and annual consumption of vegetables remained relatively stable. Under the dual effects of the changes in Cd content and dietary structure, the annual intake of Cd decreased by 49% and the health risk from Cd presence decreased by 56% from 2002 to 2017. Further, the contribution rate of the change in dietary structure to the reduction in health risk was 47%. The results showed that the change in dietary structure (rice and vegetables) was an important factor affecting the health risk from Cd intake for rural residents. |
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